/* For user documentation see docs/_writing-tests/idlharness.md */
/**
* Notes for people who want to edit this file (not just use it as a library):
*
* Most of the interesting stuff happens in the derived classes of IdlObject,
* especially IdlInterface. The entry point for all IdlObjects is .test(),
* which is called by IdlArray.test(). An IdlObject is conceptually just
* "thing we want to run tests on", and an IdlArray is an array of IdlObjects
* with some additional data thrown in.
*
* The object model is based on what WebIDLParser.js produces, which is in turn
* based on its pegjs grammar. If you want to figure out what properties an
* object will have from WebIDLParser.js, the best way is to look at the
* grammar:
*
* https://github.com/darobin/webidl.js/blob/master/lib/grammar.peg
*
* So for instance:
*
* // interface definition
* interface
* = extAttrs:extendedAttributeList? S? "interface" S name:identifier w herit:ifInheritance? w "{" w mem:ifMember* w "}" w ";" w
* { return { type: "interface", name: name, inheritance: herit, members: mem, extAttrs: extAttrs }; }
*
* This means that an "interface" object will have a .type property equal to
* the string "interface", a .name property equal to the identifier that the
* parser found, an .inheritance property equal to either null or the result of
* the "ifInheritance" production found elsewhere in the grammar, and so on.
* After each grammatical production is a JavaScript function in curly braces
* that gets called with suitable arguments and returns some JavaScript value.
*
* (Note that the version of WebIDLParser.js we use might sometimes be
* out-of-date or forked.)
*
* The members and methods of the classes defined by this file are all at least
* briefly documented, hopefully.
*/
(function(){
"use strict";
// Support subsetTestByKey from /common/subset-tests-by-key.js, but make it optional
if (!('subsetTestByKey' in self)) {
self.subsetTestByKey = function(key, callback, ...args) {
return callback(...args);
}
self.shouldRunSubTest = () => true;
}
/// Helpers ///
function constValue (cnt)
{
if (cnt.type === "null") return null;
if (cnt.type === "NaN") return NaN;
if (cnt.type === "Infinity") return cnt.negative ? -Infinity : Infinity;
if (cnt.type === "number") return +cnt.value;
return cnt.value;
}
function minOverloadLength(overloads)
{
// "The value of the Function object’s “length” property is
// a Number determined as follows:
// ". . .
// "Return the length of the shortest argument list of the
// entries in S."
if (!overloads.length) {
return 0;
}
return overloads.map(function(attr) {
return attr.arguments ? attr.arguments.filter(function(arg) {
return !arg.optional && !arg.variadic;
}).length : 0;
})
.reduce(function(m, n) { return Math.min(m, n); });
}
// A helper to get the global of a Function object. This is needed to determine
// which global exceptions the function throws will come from.
function globalOf(func)
{
try {
// Use the fact that .constructor for a Function object is normally the
// Function constructor, which can be used to mint a new function in the
// right global.
return func.constructor("return this;")();
} catch (e) {
}
// If the above fails, because someone gave us a non-function, or a function
// with a weird proto chain or weird .constructor property, just fall back
// to 'self'.
return self;
}
// https://esdiscuss.org/topic/isconstructor#content-11
function isConstructor(o) {
try {
new (new Proxy(o, {construct: () => ({})}));
return true;
} catch(e) {
return false;
}
}
function throwOrReject(a_test, operation, fn, obj, args, message, cb)
{
if (operation.idlType.generic !== "Promise") {
assert_throws_js(globalOf(fn).TypeError, function() {
fn.apply(obj, args);
}, message);
cb();
} else {
try {
promise_rejects_js(a_test, TypeError, fn.apply(obj, args), message).then(cb, cb);
} catch (e){
a_test.step(function() {
assert_unreached("Throws \"" + e + "\" instead of rejecting promise");
cb();
});
}
}
}
function awaitNCallbacks(n, cb, ctx)
{
var counter = 0;
return function() {
counter++;
if (counter >= n) {
cb();
}
};
}
/// IdlHarnessError ///
// Entry point
self.IdlHarnessError = function(message)
{
/**
* Message to be printed as the error's toString invocation.
*/
this.message = message;
};
IdlHarnessError.prototype = Object.create(Error.prototype);
IdlHarnessError.prototype.toString = function()
{
return this.message;
};
/// IdlArray ///
// Entry point
self.IdlArray = function()
{
/**
* A map from strings to the corresponding named IdlObject, such as
* IdlInterface or IdlException. These are the things that test() will run
* tests on.
*/
this.members = {};
/**
* A map from strings to arrays of strings. The keys are interface or
* exception names, and are expected to also exist as keys in this.members
* (otherwise they'll be ignored). This is populated by add_objects() --
* see documentation at the start of the file. The actual tests will be
* run by calling this.members[name].test_object(obj) for each obj in
* this.objects[name]. obj is a string that will be eval'd to produce a
* JavaScript value, which is supposed to be an object implementing the
* given IdlObject (interface, exception, etc.).
*/
this.objects = {};
/**
* When adding multiple collections of IDLs one at a time, an earlier one
* might contain a partial interface or includes statement that depends
* on a later one. Save these up and handle them right before we run
* tests.
*
* Both this.partials and this.includes will be the objects as parsed by
* WebIDLParser.js, not wrapped in IdlInterface or similar.
*/
this.partials = [];
this.includes = [];
/**
* Record of skipped IDL items, in case we later realize that they are a
* dependency (to retroactively process them).
*/
this.skipped = new Map();
};
IdlArray.prototype.add_idls = function(raw_idls, options)
{
/** Entry point. See documentation at beginning of file. */
this.internal_add_idls(WebIDL2.parse(raw_idls), options);
};
IdlArray.prototype.add_untested_idls = function(raw_idls, options)
{
/** Entry point. See documentation at beginning of file. */
var parsed_idls = WebIDL2.parse(raw_idls);
this.mark_as_untested(parsed_idls);
this.internal_add_idls(parsed_idls, options);
};
IdlArray.prototype.mark_as_untested = function (parsed_idls)
{
for (var i = 0; i < parsed_idls.length; i++) {
parsed_idls[i].untested = true;
if ("members" in parsed_idls[i]) {
for (var j = 0; j < parsed_idls[i].members.length; j++) {
parsed_idls[i].members[j].untested = true;
}
}
}
};
IdlArray.prototype.is_excluded_by_options = function (name, options)
{
return options &&
(options.except && options.except.includes(name)
|| options.only && !options.only.includes(name));
};
IdlArray.prototype.add_dependency_idls = function(raw_idls, options)
{
return this.internal_add_dependency_idls(WebIDL2.parse(raw_idls), options);
};
IdlArray.prototype.internal_add_dependency_idls = function(parsed_idls, options)
{
const new_options = { only: [] }
const all_deps = new Set();
Object.values(this.members).forEach(v => {
if (v.base) {
all_deps.add(v.base);
}
});
// Add both 'A' and 'B' for each 'A includes B' entry.
this.includes.forEach(i => {
all_deps.add(i.target);
all_deps.add(i.includes);
});
this.partials.forEach(p => all_deps.add(p.name));
// Add 'TypeOfType' for each "typedef TypeOfType MyType;" entry.
Object.entries(this.members).forEach(([k, v]) => {
if (v instanceof IdlTypedef) {
let defs = v.idlType.union
? v.idlType.idlType.map(t => t.idlType)
: [v.idlType.idlType];
defs.forEach(d => all_deps.add(d));
}
});
// Add the attribute idlTypes of all the nested members of idls.
const attrDeps = parsedIdls => {
return parsedIdls.reduce((deps, parsed) => {
if (parsed.members) {
for (const attr of Object.values(parsed.members).filter(m => m.type === 'attribute')) {
let attrType = attr.idlType;
// Check for generic members (e.g. FrozenArray<MyType>)
if (attrType.generic) {
deps.add(attrType.generic);
attrType = attrType.idlType;
}
deps.add(attrType.idlType);
}
}
if (parsed.base in this.members) {
attrDeps([this.members[parsed.base]]).forEach(dep => deps.add(dep));
}
return deps;
}, new Set());
};
const testedMembers = Object.values(this.members).filter(m => !m.untested && m.members);
attrDeps(testedMembers).forEach(dep => all_deps.add(dep));
const testedPartials = this.partials.filter(m => !m.untested && m.members);
attrDeps(testedPartials).forEach(dep => all_deps.add(dep));
if (options && options.except && options.only) {
throw new IdlHarnessError("The only and except options can't be used together.");
}
const defined_or_untested = name => {
// NOTE: Deps are untested, so we're lenient, and skip re-encountered definitions.
// e.g. for 'idl' containing A:B, B:C, C:D
// array.add_idls(idl, {only: ['A','B']}).
// array.add_dependency_idls(idl);
// B would be encountered as tested, and encountered as a dep, so we ignore.
return name in this.members
|| this.is_excluded_by_options(name, options);
}
// Maps name -> [parsed_idl, ...]
const process = function(parsed) {
var deps = [];
if (parsed.name) {
deps.push(parsed.name);
} else if (parsed.type === "includes") {
deps.push(parsed.target);
deps.push(parsed.includes);
}
deps = deps.filter(function(name) {
if (!name
|| name === parsed.name && defined_or_untested(name)
|| !all_deps.has(name)) {
// Flag as skipped, if it's not already processed, so we can
// come back to it later if we retrospectively call it a dep.
if (name && !(name in this.members)) {
this.skipped.has(name)
? this.skipped.get(name).push(parsed)
: this.skipped.set(name, [parsed]);
}
return false;
}
return true;
}.bind(this));
deps.forEach(function(name) {
if (!new_options.only.includes(name)) {
new_options.only.push(name);
}
const follow_up = new Set();
for (const dep_type of ["inheritance", "includes"]) {
if (parsed[dep_type]) {
const inheriting = parsed[dep_type];
const inheritor = parsed.name || parsed.target;
const deps = [inheriting];
// For A includes B, we can ignore A, unless B (or some of its
// members) is being tested.
if (dep_type !== "includes"
|| inheriting in this.members && !this.members[inheriting].untested
|| this.partials.some(function(p) {
return p.name === inheriting;
})) {
deps.push(inheritor);
}
for (const dep of deps) {
if (!new_options.only.includes(dep)) {
new_options.only.push(dep);
}
all_deps.add(dep);
follow_up.add(dep);
}
}
}
for (const deferred of follow_up) {
if (this.skipped.has(deferred)) {
const next = this.skipped.get(deferred);
this.skipped.delete(deferred);
next.forEach(process);
}
}
}.bind(this));
}.bind(this);
for (let parsed of parsed_idls) {
process(parsed);
}
this.mark_as_untested(parsed_idls);
if (new_options.only.length) {
this.internal_add_idls(parsed_idls, new_options);
}
}
IdlArray.prototype.internal_add_idls = function(parsed_idls, options)
{
/**
* Internal helper called by add_idls() and add_untested_idls().
*
* parsed_idls is an array of objects that come from WebIDLParser.js's
* "definitions" production. The add_untested_idls() entry point
* additionally sets an .untested property on each object (and its
* .members) so that they'll be skipped by test() -- they'll only be
* used for base interfaces of tested interfaces, return types, etc.
*
* options is a dictionary that can have an only or except member which are
* arrays. If only is given then only members, partials and interface
* targets listed will be added, and if except is given only those that
* aren't listed will be added. Only one of only and except can be used.
*/
if (options && options.only && options.except)
{
throw new IdlHarnessError("The only and except options can't be used together.");
}
var should_skip = name => {
return this.is_excluded_by_options(name, options);
}
parsed_idls.forEach(function(parsed_idl)
{
var partial_types = [
"interface",
"interface mixin",
"dictionary",
"namespace",
];
if (parsed_idl.partial && partial_types.includes(parsed_idl.type))
{
if (should_skip(parsed_idl.name))
{
return;
}
this.partials.push(parsed_idl);
return;
}
if (parsed_idl.type == "includes")
{
if (should_skip(parsed_idl.target))
{
return;
}
this.includes.push(parsed_idl);
return;
}
parsed_idl.array = this;
if (should_skip(parsed_idl.name))
{
return;
}
if (parsed_idl.name in this.members)
{
throw new IdlHarnessError("Duplicate identifier " + parsed_idl.name);
}
switch(parsed_idl.type)
{
case "interface":
this.members[parsed_idl.name] =
new IdlInterface(parsed_idl, /* is_callback = */ false, /* is_mixin = */ false);
break;
case "interface mixin":
this.members[parsed_idl.name] =
new IdlInterface(parsed_idl, /* is_callback = */ false, /* is_mixin = */ true);
break;
case "dictionary":
// Nothing to test, but we need the dictionary info around for type
// checks
this.members[parsed_idl.name] = new IdlDictionary(parsed_idl);
break;
case "typedef":
this.members[parsed_idl.name] = new IdlTypedef(parsed_idl);
break;
case "callback":
this.members[parsed_idl.name] = new IdlCallback(parsed_idl);
break;
case "enum":
this.members[parsed_idl.name] = new IdlEnum(parsed_idl);
break;
case "callback interface":
this.members[parsed_idl.name] =
new IdlInterface(parsed_idl, /* is_callback = */ true, /* is_mixin = */ false);
break;
case "namespace":
this.members[parsed_idl.name] = new IdlNamespace(parsed_idl);
break;
default:
throw parsed_idl.name + ": " + parsed_idl.type + " not yet supported";
}
}.bind(this));
};
IdlArray.prototype.add_objects = function(dict)
{
/** Entry point. See documentation at beginning of file. */
for (var k in dict)
{
if (k in this.objects)
{
this.objects[k] = this.objects[k].concat(dict[k]);
}
else
{
this.objects[k] = dict[k];
}
}
};
IdlArray.prototype.prevent_multiple_testing = function(name)
{
/** Entry point. See documentation at beginning of file. */
this.members[name].prevent_multiple_testing = true;
};
IdlArray.prototype.is_json_type = function(type)
{
/**
* Checks whether type is a JSON type as per
* https://webidl.spec.whatwg.org/#dfn-json-types
*/
var idlType = type.idlType;
if (type.generic == "Promise") { return false; }
// nullable and annotated types don't need to be handled separately,
// as webidl2 doesn't represent them wrapped-up (as they're described
// in WebIDL).
// union and record types
if (type.union || type.generic == "record") {
return idlType.every(this.is_json_type, this);
}
// sequence types
if (type.generic == "sequence" || type.generic == "FrozenArray") {
return this.is_json_type(idlType[0]);
}
if (typeof idlType != "string") { throw new Error("Unexpected type " + JSON.stringify(idlType)); }
switch (idlType)
{
// Numeric types
case "byte":
case "octet":
case "short":
case "unsigned short":
case "long":
case "unsigned long":
case "long long":
case "unsigned long long":
case "float":
case "double":
case "unrestricted float":
case "unrestricted double":
// boolean
case "boolean":
// string types
case "DOMString":
case "ByteString":
case "USVString":
// object type
case "object":
return true;
case "Error":
case "DOMException":
case "Int8Array":
case "Int16Array":
case "Int32Array":
case "Uint8Array":
case "Uint16Array":
case "Uint32Array":
case "Uint8ClampedArray":
case "BigInt64Array":
case "BigUint64Array":
case "Float16Array":
case "Float32Array":
case "Float64Array":
case "ArrayBuffer":
case "DataView":
case "any":
return false;
default:
var thing = this.members[idlType];
if (!thing) { throw new Error("Type " + idlType + " not found"); }
if (thing instanceof IdlEnum) { return true; }
if (thing instanceof IdlTypedef) {
return this.is_json_type(thing.idlType);
}
// dictionaries where all of their members are JSON types
if (thing instanceof IdlDictionary) {
const map = new Map();
for (const dict of thing.get_reverse_inheritance_stack()) {
for (const m of dict.members) {
map.set(m.name, m.idlType);
}
}
return Array.from(map.values()).every(this.is_json_type, this);
}
// interface types that have a toJSON operation declared on themselves or
// one of their inherited interfaces.
if (thing instanceof IdlInterface) {
var base;
while (thing)
{
if (thing.has_to_json_regular_operation()) { return true; }
var mixins = this.includes[thing.name];
if (mixins) {
mixins = mixins.map(function(id) {
var mixin = this.members[id];
if (!mixin) {
throw new Error("Interface " + id + " not found (implemented by " + thing.name + ")");
}
return mixin;
}, this);
if (mixins.some(function(m) { return m.has_to_json_regular_operation() } )) { return true; }
}
if (!thing.base) { return false; }
base = this.members[thing.base];
if (!base) {
throw new Error("Interface " + thing.base + " not found (inherited by " + thing.name + ")");
}
thing = base;
}
return false;
}
return false;
}
};
function exposure_set(object, default_set) {
var exposed = object.extAttrs && object.extAttrs.filter(a => a.name === "Exposed");
if (exposed && exposed.length > 1) {
throw new IdlHarnessError(
`Multiple 'Exposed' extended attributes on ${object.name}`);
}
let result = default_set || ["Window"];
if (result && !(result instanceof Set)) {
result = new Set(result);
}
if (exposed && exposed.length) {
const { rhs } = exposed[0];
// Could be a list or a string.
const set =
rhs.type === "*" ?
[ "*" ] :
rhs.type === "identifier-list" ?
rhs.value.map(id => id.value) :
[ rhs.value ];
result = new Set(set);
}
if (result && result.has("*")) {
return "*";
}
if (result && result.has("Worker")) {
result.delete("Worker");
result.add("DedicatedWorker");
result.add("ServiceWorker");
result.add("SharedWorker");
}
return result;
}
function exposed_in(globals) {
if (globals === "*") {
return true;
}
if ('Window' in self) {
return globals.has("Window");
}
if ('DedicatedWorkerGlobalScope' in self &&
self instanceof DedicatedWorkerGlobalScope) {
return globals.has("DedicatedWorker");
}
if ('SharedWorkerGlobalScope' in self &&
self instanceof SharedWorkerGlobalScope) {
return globals.has("SharedWorker");
}
if ('ServiceWorkerGlobalScope' in self &&
self instanceof ServiceWorkerGlobalScope) {
return globals.has("ServiceWorker");
}
if (Object.getPrototypeOf(self) === Object.prototype) {
// ShadowRealm - only exposed with `"*"`.
return false;
}
throw new IdlHarnessError("Unexpected global object");
}
/**
* Asserts that the given error message is thrown for the given function.
* @param {string|IdlHarnessError} error Expected Error message.
* @param {Function} idlArrayFunc Function operating on an IdlArray that should throw.
*/
IdlArray.prototype.assert_throws = function(error, idlArrayFunc)
{
try {
idlArrayFunc.call(this, this);
} catch (e) {
if (e instanceof AssertionError) {
throw e;
}
// Assertions for behaviour of the idlharness.js engine.
if (error instanceof IdlHarnessError) {
error = error.message;
}
if (e.message !== error) {
throw new IdlHarnessError(`${idlArrayFunc} threw "${e}", not the expected IdlHarnessError "${error}"`);
}
return;
}
throw new IdlHarnessError(`${idlArrayFunc} did not throw the expected IdlHarnessError`);
}
IdlArray.prototype.test = function()
{
/** Entry point. See documentation at beginning of file. */
// First merge in all partial definitions and interface mixins.
this.merge_partials();
this.merge_mixins();
// Assert B defined for A : B
for (const member of Object.values(this.members).filter(m => m.base)) {
const lhs = member.name;
const rhs = member.base;
if (!(rhs in this.members)) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${rhs} is undefined.`);
const lhs_is_interface = this.members[lhs] instanceof IdlInterface;
const rhs_is_interface = this.members[rhs] instanceof IdlInterface;
if (rhs_is_interface != lhs_is_interface) {
if (!lhs_is_interface) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${lhs} is not an interface.`);
if (!rhs_is_interface) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${rhs} is not an interface.`);
}
// Check for circular dependencies.
member.get_reverse_inheritance_stack();
}
Object.getOwnPropertyNames(this.members).forEach(function(memberName) {
var member = this.members[memberName];
if (!(member instanceof IdlInterface)) {
return;
}
var globals = exposure_set(member);
member.exposed = exposed_in(globals);
member.exposureSet = globals;
}.bind(this));
// Now run test() on every member, and test_object() for every object.
for (var name in this.members)
{
this.members[name].test();
if (name in this.objects)
{
const objects = this.objects[name];
if (!objects || !Array.isArray(objects)) {
throw new IdlHarnessError(`Invalid or empty objects for member ${name}`);
}
objects.forEach(function(str)
{
if (!this.members[name] || !(this.members[name] instanceof IdlInterface)) {
throw new IdlHarnessError(`Invalid object member name ${name}`);
}
this.members[name].test_object(str);
}.bind(this));
}
}
};
IdlArray.prototype.merge_partials = function()
{
const testedPartials = new Map();
this.partials.forEach(function(parsed_idl)
{
const originalExists = parsed_idl.name in this.members
&& (this.members[parsed_idl.name] instanceof IdlInterface
|| this.members[parsed_idl.name] instanceof IdlDictionary
|| this.members[parsed_idl.name] instanceof IdlNamespace);
// Ensure unique test name in case of multiple partials.
let partialTestName = parsed_idl.name;
let partialTestCount = 1;
if (testedPartials.has(parsed_idl.name)) {
partialTestCount += testedPartials.get(parsed_idl.name);
partialTestName = `${partialTestName}[${partialTestCount}]`;
}
testedPartials.set(parsed_idl.name, partialTestCount);
if (!parsed_idl.untested) {
test(function () {
assert_true(originalExists, `Original ${parsed_idl.type} should be defined`);
var expected;
switch (parsed_idl.type) {
case 'dictionary': expected = IdlDictionary; break;
case 'namespace': expected = IdlNamespace; break;
case 'interface':
case 'interface mixin':
default:
expected = IdlInterface; break;
}
assert_true(
expected.prototype.isPrototypeOf(this.members[parsed_idl.name]),
`Original ${parsed_idl.name} definition should have type ${parsed_idl.type}`);
}.bind(this), `Partial ${parsed_idl.type} ${partialTestName}: original ${parsed_idl.type} defined`);
}
if (!originalExists) {
// Not good.. but keep calm and carry on.
return;
}
if (parsed_idl.extAttrs)
{
// Special-case "Exposed". Must be a subset of original interface's exposure.
// Exposed on a partial is the equivalent of having the same Exposed on all nested members.
// See https://github.com/heycam/webidl/issues/154 for discrepency between Exposed and
// other extended attributes on partial interfaces.
const exposureAttr = parsed_idl.extAttrs.find(a => a.name === "Exposed");
if (exposureAttr) {
if (!parsed_idl.untested) {
test(function () {
const partialExposure = exposure_set(parsed_idl);
const memberExposure = exposure_set(this.members[parsed_idl.name]);
if (memberExposure === "*") {
return;
}
if (partialExposure === "*") {
throw new IdlHarnessError(
`Partial ${parsed_idl.name} ${parsed_idl.type} is exposed everywhere, the original ${parsed_idl.type} is not.`);
}
partialExposure.forEach(name => {
if (!memberExposure || !memberExposure.has(name)) {
throw new IdlHarnessError(
`Partial ${parsed_idl.name} ${parsed_idl.type} is exposed to '${name}', the original ${parsed_idl.type} is not.`);
}
});
}.bind(this), `Partial ${parsed_idl.type} ${partialTestName}: valid exposure set`);
}
parsed_idl.members.forEach(function (member) {
member.extAttrs.push(exposureAttr);
}.bind(this));
}
parsed_idl.extAttrs.forEach(function(extAttr)
{
// "Exposed" already handled above.
if (extAttr.name === "Exposed") {
return;
}
this.members[parsed_idl.name].extAttrs.push(extAttr);
}.bind(this));
}
if (parsed_idl.members.length) {
test(function () {
var clash = parsed_idl.members.find(function(member) {
return this.members[parsed_idl.name].members.find(function(m) {
return this.are_duplicate_members(m, member);
}.bind(this));
}.bind(this));
parsed_idl.members.forEach(function(member)
{
this.members[parsed_idl.name].members.push(new IdlInterfaceMember(member));
}.bind(this));
assert_true(!clash, "member " + (clash && clash.name) + " is unique");
}.bind(this), `Partial ${parsed_idl.type} ${partialTestName}: member names are unique`);
}
}.bind(this));
this.partials = [];
}
IdlArray.prototype.merge_mixins = function()
{
for (const parsed_idl of this.includes)
{
const lhs = parsed_idl.target;
const rhs = parsed_idl.includes;
var errStr = lhs + " includes " + rhs + ", but ";
if (!(lhs in this.members)) throw errStr + lhs + " is undefined.";
if (!(this.members[lhs] instanceof IdlInterface)) throw errStr + lhs + " is not an interface.";
if (!(rhs in this.members)) throw errStr + rhs + " is undefined.";
if (!(this.members[rhs] instanceof IdlInterface)) throw errStr + rhs + " is not an interface.";
if (this.members[rhs].members.length) {
test(function () {
var clash = this.members[rhs].members.find(function(member) {
return this.members[lhs].members.find(function(m) {
return this.are_duplicate_members(m, member);
}.bind(this));
}.bind(this));
this.members[rhs].members.forEach(function(member) {
assert_true(
this.members[lhs].members.every(m => !this.are_duplicate_members(m, member)),
"member " + member.name + " is unique");
this.members[lhs].members.push(new IdlInterfaceMember(member));
}.bind(this));
assert_true(!clash, "member " + (clash && clash.name) + " is unique");
}.bind(this), lhs + " includes " + rhs + ": member names are unique");
}
}
this.includes = [];
}
IdlArray.prototype.are_duplicate_members = function(m1, m2) {
if (m1.name !== m2.name) {
return false;
}
if (m1.type === 'operation' && m2.type === 'operation'
&& m1.arguments.length !== m2.arguments.length) {
// Method overload. TODO: Deep comparison of arguments.
return false;
}
return true;
}
IdlArray.prototype.assert_type_is = function(value, type)
{
if (type.idlType in this.members
&& this.members[type.idlType] instanceof IdlTypedef) {
this.assert_type_is(value, this.members[type.idlType].idlType);
return;
}
if (type.nullable && value === null)
{
// This is fine
return;
}
if (type.union) {
for (var i = 0; i < type.idlType.length; i++) {
try {
this.assert_type_is(value, type.idlType[i]);
// No AssertionError, so we match one type in the union
return;
} catch(e) {
if (e instanceof AssertionError) {
// We didn't match this type, let's try some others
continue;
}
throw e;
}
}
// TODO: Is there a nice way to list the union's types in the message?
assert_true(false, "Attribute has value " + format_value(value)
+ " which doesn't match any of the types in the union");
}
/**
* Helper function that tests that value is an instance of type according
* to the rules of WebIDL. value is any JavaScript value, and type is an
* object produced by WebIDLParser.js' "type" production. That production
* is fairly elaborate due to the complexity of WebIDL's types, so it's
* best to look at the grammar to figure out what properties it might have.
*/
if (type.idlType == "any")
{
// No assertions to make
return;
}
if (type.array)
{
// TODO: not supported yet
return;
}
if (type.generic === "sequence" || type.generic == "ObservableArray")
{
assert_true(Array.isArray(value), "should be an Array");
if (!value.length)
{
// Nothing we can do.
return;
}
this.assert_type_is(value[0], type.idlType[0]);
return;
}
if (type.generic === "Promise") {
assert_true("then" in value, "Attribute with a Promise type should have a then property");
// TODO: Ideally, we would check on project fulfillment
// that we get the right type
// but that would require making the type check async
return;
}
if (type.generic === "FrozenArray") {
assert_true(Array.isArray(value), "Value should be array");
assert_true(Object.isFrozen(value), "Value should be frozen");
if (!value.length)
{
// Nothing we can do.
return;
}
this.assert_type_is(value[0], type.idlType[0]);
return;
}
type = Array.isArray(type.idlType) ? type.idlType[0] : type.idlType;
switch(type)
{
case "undefined":
assert_equals(value, undefined);
return;
case "boolean":
assert_equals(typeof value, "boolean");
return;
case "byte":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "should be an integer");
assert_true(-128 <= value && value <= 127, "byte " + value + " should be in range [-128, 127]");
return;
case "octet":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "should be an integer");
assert_true(0 <= value && value <= 255, "octet " + value + " should be in range [0, 255]");
return;
case "short":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "should be an integer");
assert_true(-32768 <= value && value <= 32767, "short " + value + " should be in range [-32768, 32767]");
return;
case "unsigned short":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "should be an integer");
assert_true(0 <= value && value <= 65535, "unsigned short " + value + " should be in range [0, 65535]");
return;
case "long":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "should be an integer");
assert_true(-2147483648 <= value && value <= 2147483647, "long " + value + " should be in range [-2147483648, 2147483647]");
return;
case "unsigned long":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "should be an integer");
assert_true(0 <= value && value <= 4294967295, "unsigned long " + value + " should be in range [0, 4294967295]");
return;
case "long long":
assert_equals(typeof value, "number");
return;
case "unsigned long long":
case "DOMTimeStamp":
assert_equals(typeof value, "number");
assert_true(0 <= value, "unsigned long long should be positive");
return;
case "float":
assert_equals(typeof value, "number");
assert_equals(value, Math.fround(value), "float rounded to 32-bit float should be itself");
assert_not_equals(value, Infinity);
assert_not_equals(value, -Infinity);
assert_not_equals(value, NaN);
return;
case "DOMHighResTimeStamp":
case "double":
assert_equals(typeof value, "number");
assert_not_equals(value, Infinity);
assert_not_equals(value, -Infinity);
assert_not_equals(value, NaN);
return;
case "unrestricted float":
assert_equals(typeof value, "number");
assert_equals(value, Math.fround(value), "unrestricted float rounded to 32-bit float should be itself");
return;
case "unrestricted double":
assert_equals(typeof value, "number");
return;
case "DOMString":
assert_equals(typeof value, "string");
return;
case "ByteString":
assert_equals(typeof value, "string");
assert_regexp_match(value, /^[\x00-\x7F]*$/);
return;
case "USVString":
assert_equals(typeof value, "string");
assert_regexp_match(value, /^([\x00-\ud7ff\ue000-\uffff]|[\ud800-\udbff][\udc00-\udfff])*$/);
return;
case "ArrayBufferView":
assert_true(ArrayBuffer.isView(value));
return;
case "object":
assert_in_array(typeof value, ["object", "function"], "wrong type: not object or function");
return;
}
// This is a catch-all for any IDL type name which follows JS class
// semantics. This includes some non-interface IDL types (e.g. Int8Array,
// Function, ...), as well as any interface types that are not in the IDL
// that is fed to the harness. If an IDL type does not follow JS class
// semantics then it should go in the switch statement above. If an IDL
// type needs full checking, then the test should include it in the IDL it
// feeds to the harness.
if (!(type in this.members))
{
assert_true(value instanceof self[type], "wrong type: not a " + type);
return;
}
if (this.members[type] instanceof IdlInterface)
{
// We don't want to run the full
// IdlInterface.prototype.test_instance_of, because that could result
// in an infinite loop. TODO: This means we don't have tests for
// LegacyNoInterfaceObject interfaces, and we also can't test objects
// that come from another self.
assert_in_array(typeof value, ["object", "function"], "wrong type: not object or function");
if (value instanceof Object
&& !this.members[type].has_extended_attribute("LegacyNoInterfaceObject")
&& type in self)
{
assert_true(value instanceof self[type], "instanceof " + type);
}
}
else if (this.members[type] instanceof IdlEnum)
{
assert_equals(typeof value, "string");
}
else if (this.members[type] instanceof IdlDictionary)
{
// TODO: Test when we actually have something to test this on
}
else if (this.members[type] instanceof IdlCallback)
{
assert_equals(typeof value, "function");
}
else
{
throw new IdlHarnessError("Type " + type + " isn't an interface, callback or dictionary");
}
};
/// IdlObject ///
function IdlObject() {}
IdlObject.prototype.test = function()
{
/**
* By default, this does nothing, so no actual tests are run for IdlObjects
* that don't define any (e.g., IdlDictionary at the time of this writing).
*/
};
IdlObject.prototype.has_extended_attribute = function(name)
{
/**
* This is only meaningful for things that support extended attributes,
* such as interfaces, exceptions, and members.
*/
return this.extAttrs.some(function(o)
{
return o.name == name;
});
};
/// IdlDictionary ///
// Used for IdlArray.prototype.assert_type_is
function IdlDictionary(obj)
{
/**
* obj is an object produced by the WebIDLParser.js "dictionary"
* production.
*/
/** Self-explanatory. */
this.name = obj.name;
/** A back-reference to our IdlArray. */
this.array = obj.array;
/** An array of objects produced by the "dictionaryMember" production. */
this.members = obj.members;
/**
* The name (as a string) of the dictionary type we inherit from, or null
* if there is none.
*/
this.base = obj.inheritance;
}
IdlDictionary.prototype = Object.create(IdlObject.prototype);
IdlDictionary.prototype.get_reverse_inheritance_stack = function() {
return IdlInterface.prototype.get_reverse_inheritance_stack.call(this);
};
/// IdlInterface ///
function IdlInterface(obj, is_callback, is_mixin)
{
/**
* obj is an object produced by the WebIDLParser.js "interface" production.
*/
/** Self-explanatory. */
this.name = obj.name;
/** A back-reference to our IdlArray. */
this.array = obj.array;
/**
* An indicator of whether we should run tests on the interface object and
* interface prototype object. Tests on members are controlled by .untested
* on each member, not this.
*/
this.untested = obj.untested;
/** An array of objects produced by the "ExtAttr" production. */
this.extAttrs = obj.extAttrs;
/** An array of IdlInterfaceMembers. */
this.members = obj.members.map(function(m){return new IdlInterfaceMember(m); });
if (this.has_extended_attribute("LegacyUnforgeable")) {
this.members
.filter(function(m) { return m.special !== "static" && (m.type == "attribute" || m.type == "operation"); })
.forEach(function(m) { return m.isUnforgeable = true; });
}
/**
* The name (as a string) of the type we inherit from, or null if there is
* none.
*/
this.base = obj.inheritance;
this._is_callback = is_callback;
this._is_mixin = is_mixin;
}
IdlInterface.prototype = Object.create(IdlObject.prototype);
IdlInterface.prototype.is_callback = function()
{
return this._is_callback;
};
IdlInterface.prototype.is_mixin = function()
{
return this._is_mixin;
};
IdlInterface.prototype.has_constants = function()
{
return this.members.some(function(member) {
return member.type === "const";
});
};
IdlInterface.prototype.get_unscopables = function()
{
return this.members.filter(function(member) {
return member.isUnscopable;
});
};
IdlInterface.prototype.is_global = function()
{
return this.extAttrs.some(function(attribute) {
return attribute.name === "Global";
});
};
/**
* Value of the LegacyNamespace extended attribute, if any.
*
* https://webidl.spec.whatwg.org/#LegacyNamespace
*/
IdlInterface.prototype.get_legacy_namespace = function()
{
var legacyNamespace = this.extAttrs.find(function(attribute) {
return attribute.name === "LegacyNamespace";
});
return legacyNamespace ? legacyNamespace.rhs.value : undefined;
};
IdlInterface.prototype.get_interface_object_owner = function()
{
var legacyNamespace = this.get_legacy_namespace();
return legacyNamespace ? self[legacyNamespace] : self;
};
IdlInterface.prototype.should_have_interface_object = function()
{
// "For every interface that is exposed in a given ECMAScript global
// environment and:
// * is a callback interface that has constants declared on it, or
// * is a non-callback interface that is not declared with the
// [LegacyNoInterfaceObject] extended attribute,
// a corresponding property MUST exist on the ECMAScript global object.
return this.is_callback() ? this.has_constants() : !this.has_extended_attribute("LegacyNoInterfaceObject");
};
IdlInterface.prototype.assert_interface_object_exists = function()
{
var owner = this.get_legacy_namespace() || "self";
assert_own_property(self[owner], this.name, owner + " does not have own property " + format_value(this.name));
};
IdlInterface.prototype.get_interface_object = function() {
if (!this.should_have_interface_object()) {
var reason = this.is_callback() ? "lack of declared constants" : "declared [LegacyNoInterfaceObject] attribute";
throw new IdlHarnessError(this.name + " has no interface object due to " + reason);
}
return this.get_interface_object_owner()[this.name];
};
IdlInterface.prototype.get_qualified_name = function() {
// https://webidl.spec.whatwg.org/#qualified-name
var legacyNamespace = this.get_legacy_namespace();
if (legacyNamespace) {
return legacyNamespace + "." + this.name;
}
return this.name;
};
IdlInterface.prototype.has_to_json_regular_operation = function() {
return this.members.some(function(m) {
return m.is_to_json_regular_operation();
});
};
IdlInterface.prototype.has_default_to_json_regular_operation = function() {
return this.members.some(function(m) {
return m.is_to_json_regular_operation() && m.has_extended_attribute("Default");
});
};
/**
* Implementation of https://webidl.spec.whatwg.org/#create-an-inheritance-stack
* with the order reversed.
*
* The order is reversed so that the base class comes first in the list, because
* this is what all call sites need.
*
* So given:
*
* A : B {};
* B : C {};
* C {};
*
* then A.get_reverse_inheritance_stack() returns [C, B, A],
* and B.get_reverse_inheritance_stack() returns [C, B].
*
* Note: as dictionary inheritance is expressed identically by the AST,
* this works just as well for getting a stack of inherited dictionaries.
*/
IdlInterface.prototype.get_reverse_inheritance_stack = function() {
const stack = [this];
let idl_interface = this;
while (idl_interface.base) {
const base = this.array.members[idl_interface.base];
if (!base) {
throw new Error(idl_interface.type + " " + idl_interface.base + " not found (inherited by " + idl_interface.name + ")");
} else if (stack.indexOf(base) > -1) {
stack.unshift(base);
const dep_chain = stack.map(i => i.name).join(',');
throw new IdlHarnessError(`${this.name} has a circular dependency: ${dep_chain}`);
}
idl_interface = base;
stack.unshift(idl_interface);
}
return stack;
};
/**
* Implementation of
* https://webidl.spec.whatwg.org/#default-tojson-operation
* for testing purposes.
*
* Collects the IDL types of the attributes that meet the criteria
* for inclusion in the default toJSON operation for easy
* comparison with actual value
*/
IdlInterface.prototype.default_to_json_operation = function() {
const map = new Map()
let isDefault = false;
for (const I of this.get_reverse_inheritance_stack()) {
if (I.has_default_to_json_regular_operation()) {
isDefault = true;
for (const m of I.members) {
if (m.special !== "static" && m.type == "attribute" && I.array.is_json_type(m.idlType)) {
map.set(m.name, m.idlType);
}
}
} else if (I.has_to_json_regular_operation()) {
isDefault = false;
}
}
return isDefault ? map : null;
};
IdlInterface.prototype.test = function()
{
if (this.has_extended_attribute("LegacyNoInterfaceObject") || this.is_mixin())
{
// No tests to do without an instance. TODO: We should still be able
// to run tests on the prototype object, if we obtain one through some
// other means.
return;
}
// If the interface object is not exposed, only test that. Members can't be
// tested either, but objects could still be tested in |test_object|.
if (!this.exposed)
{
if (!this.untested)
{
subsetTestByKey(this.name, test, function() {
assert_false(this.name in self);
}.bind(this), this.name + " interface: existence and properties of interface object");
}
return;
}
if (!this.untested)
{
// First test things to do with the exception/interface object and
// exception/interface prototype object.
this.test_self();
}
// Then test things to do with its members (constants, fields, attributes,
// operations, . . .). These are run even if .untested is true, because
// members might themselves be marked as .untested. This might happen to
// interfaces if the interface itself is untested but a partial interface
// that extends it is tested -- then the interface itself and its initial
// members will be marked as untested, but the members added by the partial
// interface are still tested.
this.test_members();
};
IdlInterface.prototype.constructors = function()
{
return this.members
.filter(function(m) { return m.type == "constructor"; });
}
IdlInterface.prototype.test_self = function()
{
subsetTestByKey(this.name, test, function()
{
if (!this.should_have_interface_object()) {
return;
}
// The name of the property is the identifier of the interface, and its
// value is an object called the interface object.
// The property has the attributes { [[Writable]]: true,
// [[Enumerable]]: false, [[Configurable]]: true }."
// TODO: Should we test here that the property is actually writable
// etc., or trust getOwnPropertyDescriptor?
this.assert_interface_object_exists();
var desc = Object.getOwnPropertyDescriptor(this.get_interface_object_owner(), this.name);
assert_false("get" in desc, "self's property " + format_value(this.name) + " should not have a getter");
assert_false("set" in desc, "self's property " + format_value(this.name) + " should not have a setter");
assert_true(desc.writable, "self's property " + format_value(this.name) + " should be writable");
assert_false(desc.enumerable, "self's property " + format_value(this.name) + " should not be enumerable");
assert_true(desc.configurable, "self's property " + format_value(this.name) + " should be configurable");
if (this.is_callback()) {
// "The internal [[Prototype]] property of an interface object for
// a callback interface must be the Function.prototype object."
assert_equals(Object.getPrototypeOf(this.get_interface_object()), Function.prototype,
"prototype of self's property " + format_value(this.name) + " is not Object.prototype");
return;
}
// "The interface object for a given non-callback interface is a
// function object."
// "If an object is defined to be a function object, then it has
// characteristics as follows:"
// Its [[Prototype]] internal property is otherwise specified (see
// below).
// "* Its [[Get]] internal property is set as described in ECMA-262
// section 9.1.8."
// Not much to test for this.
// "* Its [[Construct]] internal property is set as described in
// ECMA-262 section 19.2.2.3."
// "* Its @@hasInstance property is set as described in ECMA-262
// section 19.2.3.8, unless otherwise specified."
// TODO
// ES6 (rev 30) 19.1.3.6:
// "Else, if O has a [[Call]] internal method, then let builtinTag be
// "Function"."
assert_class_string(this.get_interface_object(), "Function", "class string of " + this.name);
// "The [[Prototype]] internal property of an interface object for a
// non-callback interface is determined as follows:"
var prototype = Object.getPrototypeOf(this.get_interface_object());
if (this.base) {
// "* If the interface inherits from some other interface, the
// value of [[Prototype]] is the interface object for that other
// interface."
var inherited_interface = this.array.members[this.base];
if (!inherited_interface.has_extended_attribute("LegacyNoInterfaceObject")) {
inherited_interface.assert_interface_object_exists();
assert_equals(prototype, inherited_interface.get_interface_object(),
'prototype of ' + this.name + ' is not ' +
this.base);
}
} else {
// "If the interface doesn't inherit from any other interface, the
// value of [[Prototype]] is %FunctionPrototype% ([ECMA-262],
// section 6.1.7.4)."
assert_equals(prototype, Function.prototype,
"prototype of self's property " + format_value(this.name) + " is not Function.prototype");
}
// Always test for [[Construct]]:
// https://github.com/heycam/webidl/issues/698
assert_true(isConstructor(this.get_interface_object()), "interface object must pass IsConstructor check");
var interface_object = this.get_interface_object();
assert_throws_js(globalOf(interface_object).TypeError, function() {
interface_object();
}, "interface object didn't throw TypeError when called as a function");
if (!this.constructors().length) {
assert_throws_js(globalOf(interface_object).TypeError, function() {
new interface_object();
}, "interface object didn't throw TypeError when called as a constructor");
}
}.bind(this), this.name + " interface: existence and properties of interface object");
if (this.should_have_interface_object() && !this.is_callback()) {
subsetTestByKey(this.name, test, function() {
// This function tests WebIDL as of 2014-10-25.
// https://webidl.spec.whatwg.org/#es-interface-call
this.assert_interface_object_exists();
// "Interface objects for non-callback interfaces MUST have a
// property named “length” with attributes { [[Writable]]: false,
// [[Enumerable]]: false, [[Configurable]]: true } whose value is
// a Number."
assert_own_property(this.get_interface_object(), "length");
var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), "length");
assert_false("get" in desc, this.name + ".length should not have a getter");
assert_false("set" in desc, this.name + ".length should not have a setter");
assert_false(desc.writable, this.name + ".length should not be writable");
assert_false(desc.enumerable, this.name + ".length should not be enumerable");
assert_true(desc.configurable, this.name + ".length should be configurable");
var constructors = this.constructors();
var expected_length = minOverloadLength(constructors);
assert_equals(this.get_interface_object().length, expected_length, "wrong value for " + this.name + ".length");
}.bind(this), this.name + " interface object length");
}
if (this.should_have_interface_object()) {
subsetTestByKey(this.name, test, function() {
// This function tests WebIDL as of 2015-11-17.
// https://webidl.spec.whatwg.org/#interface-object
this.assert_interface_object_exists();
// "All interface objects must have a property named “name” with
// attributes { [[Writable]]: false, [[Enumerable]]: false,
// [[Configurable]]: true } whose value is the identifier of the
// corresponding interface."
assert_own_property(this.get_interface_object(), "name");
var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), "name");
assert_false("get" in desc, this.name + ".name should not have a getter");
assert_false("set" in desc, this.name + ".name should not have a setter");
assert_false(desc.writable, this.name + ".name should not be writable");
assert_false(desc.enumerable, this.name + ".name should not be enumerable");
assert_true(desc.configurable, this.name + ".name should be configurable");
assert_equals(this.get_interface_object().name, this.name, "wrong value for " + this.name + ".name");
}.bind(this), this.name + " interface object name");
}
if (this.has_extended_attribute("LegacyWindowAlias")) {
subsetTestByKey(this.name, test, function()
{
var aliasAttrs = this.extAttrs.filter(function(o) { return o.name === "LegacyWindowAlias"; });
if (aliasAttrs.length > 1) {
throw new IdlHarnessError("Invalid IDL: multiple LegacyWindowAlias extended attributes on " + this.name);
}
if (this.is_callback()) {
throw new IdlHarnessError("Invalid IDL: LegacyWindowAlias extended attribute on non-interface " + this.name);
}
if (!(this.exposureSet === "*" || this.exposureSet.has("Window"))) {
throw new IdlHarnessError("Invalid IDL: LegacyWindowAlias extended attribute on " + this.name + " which is not exposed in Window");
}
// TODO: when testing of [LegacyNoInterfaceObject] interfaces is supported,
// check that it's not specified together with LegacyWindowAlias.
// TODO: maybe check that [LegacyWindowAlias] is not specified on a partial interface.
var rhs = aliasAttrs[0].rhs;
if (!rhs) {
throw new IdlHarnessError("Invalid IDL: LegacyWindowAlias extended attribute on " + this.name + " without identifier");
}
var aliases;
if (rhs.type === "identifier-list") {
aliases = rhs.value.map(id => id.value);
} else { // rhs.type === identifier
aliases = [ rhs.value ];
}
// OK now actually check the aliases...
var alias;
if (exposed_in(exposure_set(this, this.exposureSet)) && 'document' in self) {
for (alias of aliases) {
assert_true(alias in self, alias + " should exist");
assert_equals(self[alias], this.get_interface_object(), "self." + alias + " should be the same value as self." + this.get_qualified_name());
var desc = Object.getOwnPropertyDescriptor(self, alias);
assert_equals(desc.value, this.get_interface_object(), "wrong value in " + alias + " property descriptor");
assert_true(desc.writable, alias + " should be writable");
assert_false(desc.enumerable, alias + " should not be enumerable");
assert_true(desc.configurable, alias + " should be configurable");
assert_false('get' in desc, alias + " should not have a getter");
assert_false('set' in desc, alias + " should not have a setter");
}
} else {
for (alias of aliases) {
assert_false(alias in self, alias + " should not exist");
}
}
}.bind(this), this.name + " interface: legacy window alias");
}
if (this.has_extended_attribute("LegacyFactoryFunction")) {
var constructors = this.extAttrs
.filter(function(attr) { return attr.name == "LegacyFactoryFunction"; });
if (constructors.length !== 1) {
throw new IdlHarnessError("Internal error: missing support for multiple LegacyFactoryFunction extended attributes");
}
var constructor = constructors[0];
var min_length = minOverloadLength([constructor]);
subsetTestByKey(this.name, test, function()
{
// This function tests WebIDL as of 2019-01-14.
// "for every [LegacyFactoryFunction] extended attribute on an exposed
// interface, a corresponding property must exist on the ECMAScript
// global object. The name of the property is the
// [LegacyFactoryFunction]'s identifier, and its value is an object
// called a named constructor, ... . The property has the attributes
// { [[Writable]]: true, [[Enumerable]]: false,
// [[Configurable]]: true }."
var name = constructor.rhs.value;
assert_own_property(self, name);
var desc = Object.getOwnPropertyDescriptor(self, name);
assert_equals(desc.value, self[name], "wrong value in " + name + " property descriptor");
assert_true(desc.writable, name + " should be writable");
assert_false(desc.enumerable, name + " should not be enumerable");
assert_true(desc.configurable, name + " should be configurable");
assert_false("get" in desc, name + " should not have a getter");
assert_false("set" in desc, name + " should not have a setter");
}.bind(this), this.name + " interface: named constructor");
subsetTestByKey(this.name, test, function()
{
// This function tests WebIDL as of 2019-01-14.
// "2. Let F be ! CreateBuiltinFunction(realm, steps,
// realm.[[Intrinsics]].[[%FunctionPrototype%]])."
var name = constructor.rhs.value;
var value = self[name];
assert_equals(typeof value, "function", "type of value in " + name + " property descriptor");
assert_not_equals(value, this.get_interface_object(), "wrong value in " + name + " property descriptor");
assert_equals(Object.getPrototypeOf(value), Function.prototype, "wrong value for " + name + "'s prototype");
}.bind(this), this.name + " interface: named constructor object");
subsetTestByKey(this.name, test, function()
{
// This function tests WebIDL as of 2019-01-14.
// "7. Let proto be the interface prototype object of interface I
// in realm.
// "8. Perform ! DefinePropertyOrThrow(F, "prototype",
// PropertyDescriptor{
// [[Value]]: proto, [[Writable]]: false,
// [[Enumerable]]: false, [[Configurable]]: false
// })."
var name = constructor.rhs.value;
var expected = this.get_interface_object().prototype;
var desc = Object.getOwnPropertyDescriptor(self[name], "prototype");
assert_equals(desc.value, expected, "wrong value for " + name + ".prototype");
assert_false(desc.writable, "prototype should not be writable");
assert_false(desc.enumerable, "prototype should not be enumerable");
assert_false(desc.configurable, "prototype should not be configurable");
assert_false("get" in desc, "prototype should not have a getter");
assert_false("set" in desc, "prototype should not have a setter");
}.bind(this), this.name + " interface: named constructor prototype property");
subsetTestByKey(this.name, test, function()
{
// This function tests WebIDL as of 2019-01-14.
// "3. Perform ! SetFunctionName(F, id)."
var name = constructor.rhs.value;
var desc = Object.getOwnPropertyDescriptor(self[name], "name");
assert_equals(desc.value, name, "wrong value for " + name + ".name");
assert_false(desc.writable, "name should not be writable");
assert_false(desc.enumerable, "name should not be enumerable");
assert_true(desc.configurable, "name should be configurable");
assert_false("get" in desc, "name should not have a getter");
assert_false("set" in desc, "name should not have a setter");
}.bind(this), this.name + " interface: named constructor name");
subsetTestByKey(this.name, test, function()
{
// This function tests WebIDL as of 2019-01-14.
// "4. Initialize S to the effective overload set for constructors
// with identifier id on interface I and with argument count 0.
// "5. Let length be the length of the shortest argument list of
// the entries in S.
// "6. Perform ! SetFunctionLength(F, length)."
var name = constructor.rhs.value;
var desc = Object.getOwnPropertyDescriptor(self[name], "length");
assert_equals(desc.value, min_length, "wrong value for " + name + ".length");
assert_false(desc.writable, "length should not be writable");
assert_false(desc.enumerable, "length should not be enumerable");
assert_true(desc.configurable, "length should be configurable");
assert_false("get" in desc, "length should not have a getter");
assert_false("set" in desc, "length should not have a setter");
}.bind(this), this.name + " interface: named constructor length");
subsetTestByKey(this.name, test, function()
{
// This function tests WebIDL as of 2019-01-14.
// "1. Let steps be the following steps:
// " 1. If NewTarget is undefined, then throw a TypeError."
var name = constructor.rhs.value;
var args = constructor.arguments.map(function(arg) {
return create_suitable_object(arg.idlType);
});
assert_throws_js(globalOf(self[name]).TypeError, function() {
self[name](...args);
}.bind(this));
}.bind(this), this.name + " interface: named constructor without 'new'");
}
subsetTestByKey(this.name, test, function()
{
// This function tests WebIDL as of 2015-01-21.
// https://webidl.spec.whatwg.org/#interface-object
if (!this.should_have_interface_object()) {
return;
}
this.assert_interface_object_exists();
if (this.is_callback()) {
assert_false("prototype" in this.get_interface_object(),
this.name + ' should not have a "prototype" property');
return;
}
// "An interface object for a non-callback interface must have a
// property named “prototype” with attributes { [[Writable]]: false,
// [[Enumerable]]: false, [[Configurable]]: false } whose value is an
// object called the interface prototype object. This object has
// properties that correspond to the regular attributes and regular
// operations defined on the interface, and is described in more detail
// in section 4.5.4 below."
assert_own_property(this.get_interface_object(), "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), "prototype");
assert_false("get" in desc, this.name + ".prototype should not have a getter");
assert_false("set" in desc, this.name + ".prototype should not have a setter");
assert_false(desc.writable, this.name + ".prototype should not be writable");
assert_false(desc.enumerable, this.name + ".prototype should not be enumerable");
assert_false(desc.configurable, this.name + ".prototype should not be configurable");
// Next, test that the [[Prototype]] of the interface prototype object
// is correct. (This is made somewhat difficult by the existence of
// [LegacyNoInterfaceObject].)
// TODO: Aryeh thinks there's at least other place in this file where
// we try to figure out if an interface prototype object is
// correct. Consolidate that code.
// "The interface prototype object for a given interface A must have an
// internal [[Prototype]] property whose value is returned from the
// following steps:
// "If A is declared with the [Global] extended
// attribute, and A supports named properties, then return the named
// properties object for A, as defined in §3.6.4 Named properties
// object.
// "Otherwise, if A is declared to inherit from another interface, then
// return the interface prototype object for the inherited interface.
// "Otherwise, return %ObjectPrototype%.
//
// "In the ECMAScript binding, the DOMException type has some additional
// requirements:
//
// "Unlike normal interface types, the interface prototype object
// for DOMException must have as its [[Prototype]] the intrinsic
// object %ErrorPrototype%."
//
if (this.name === "Window") {
assert_class_string(Object.getPrototypeOf(this.get_interface_object().prototype),
'WindowProperties',
'Class name for prototype of Window' +
'.prototype is not "WindowProperties"');
} else {
var inherit_interface, inherit_interface_interface_object;
if (this.base) {
inherit_interface = this.base;
var parent = this.array.members[inherit_interface];
if (!parent.has_extended_attribute("LegacyNoInterfaceObject")) {
parent.assert_interface_object_exists();
inherit_interface_interface_object = parent.get_interface_object();
}
} else if (this.name === "DOMException") {
inherit_interface = 'Error';
inherit_interface_interface_object = self.Error;
} else {
inherit_interface = 'Object';
inherit_interface_interface_object = self.Object;
}
if (inherit_interface_interface_object) {
assert_not_equals(inherit_interface_interface_object, undefined,
'should inherit from ' + inherit_interface + ', but there is no such property');
assert_own_property(inherit_interface_interface_object, 'prototype',
'should inherit from ' + inherit_interface + ', but that object has no "prototype" property');
assert_equals(Object.getPrototypeOf(this.get_interface_object().prototype),
inherit_interface_interface_object.prototype,
'prototype of ' + this.name + '.prototype is not ' + inherit_interface + '.prototype');
} else {
// We can't test that we get the correct object, because this is the
// only way to get our hands on it. We only test that its class
// string, at least, is correct.
assert_class_string(Object.getPrototypeOf(this.get_interface_object().prototype),
inherit_interface + 'Prototype',
'Class name for prototype of ' + this.name +
'.prototype is not "' + inherit_interface + 'Prototype"');
}
}
// "The class string of an interface prototype object is the
// concatenation of the interface’s qualified identifier and the string
// “Prototype”."
// Skip these tests for now due to a specification issue about
// prototype name.
// https://www.w3.org/Bugs/Public/show_bug.cgi?id=28244
// assert_class_string(this.get_interface_object().prototype, this.get_qualified_name() + "Prototype",
// "class string of " + this.name + ".prototype");
// String() should end up calling {}.toString if nothing defines a
// stringifier.
if (!this.has_stringifier()) {
// assert_equals(String(this.get_interface_object().prototype), "[object " + this.get_qualified_name() + "Prototype]",
// "String(" + this.name + ".prototype)");
}
}.bind(this), this.name + " interface: existence and properties of interface prototype object");
// "If the interface is declared with the [Global]
// extended attribute, or the interface is in the set of inherited
// interfaces for any other interface that is declared with one of these
// attributes, then the interface prototype object must be an immutable
// prototype exotic object."
// https://webidl.spec.whatwg.org/#interface-prototype-object
if (this.is_global()) {
this.test_immutable_prototype("interface prototype object", this.get_interface_object().prototype);
}
subsetTestByKey(this.name, test, function()
{
if (!this.should_have_interface_object()) {
return;
}
this.assert_interface_object_exists();
if (this.is_callback()) {
assert_false("prototype" in this.get_interface_object(),
this.name + ' should not have a "prototype" property');
return;
}
assert_own_property(this.get_interface_object(), "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "If the [LegacyNoInterfaceObject] extended attribute was not specified
// on the interface, then the interface prototype object must also have a
// property named “constructor” with attributes { [[Writable]]: true,
// [[Enumerable]]: false, [[Configurable]]: true } whose value is a
// reference to the interface object for the interface."
assert_own_property(this.get_interface_object().prototype, "constructor",
this.name + '.prototype does not have own property "constructor"');
var desc = Object.getOwnPropertyDescriptor(this.get_interface_object().prototype, "constructor");
assert_false("get" in desc, this.name + ".prototype.constructor should not have a getter");
assert_false("set" in desc, this.name + ".prototype.constructor should not have a setter");
assert_true(desc.writable, this.name + ".prototype.constructor should be writable");
assert_false(desc.enumerable, this.name + ".prototype.constructor should not be enumerable");
assert_true(desc.configurable, this.name + ".prototype.constructor should be configurable");
assert_equals(this.get_interface_object().prototype.constructor, this.get_interface_object(),
this.name + '.prototype.constructor is not the same object as ' + this.name);
}.bind(this), this.name + ' interface: existence and properties of interface prototype object\'s "constructor" property');
subsetTestByKey(this.name, test, function()
{
if (!this.should_have_interface_object()) {
return;
}
this.assert_interface_object_exists();
if (this.is_callback()) {
assert_false("prototype" in this.get_interface_object(),
this.name + ' should not have a "prototype" property');
return;
}
assert_own_property(this.get_interface_object(), "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// If the interface has any member declared with the [Unscopable] extended
// attribute, then there must be a property on the interface prototype object
// whose name is the @@unscopables symbol, which has the attributes
// { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true },
// and whose value is an object created as follows...
var unscopables = this.get_unscopables().map(m => m.name);
var proto = this.get_interface_object().prototype;
if (unscopables.length != 0) {
assert_own_property(
proto, Symbol.unscopables,
this.name + '.prototype should have an @@unscopables property');
var desc = Object.getOwnPropertyDescriptor(proto, Symbol.unscopables);
assert_false("get" in desc,
this.name + ".prototype[Symbol.unscopables] should not have a getter");
assert_false("set" in desc, this.name + ".prototype[Symbol.unscopables] should not have a setter");
assert_false(desc.writable, this.name + ".prototype[Symbol.unscopables] should not be writable");
assert_false(desc.enumerable, this.name + ".prototype[Symbol.unscopables] should not be enumerable");
assert_true(desc.configurable, this.name + ".prototype[Symbol.unscopables] should be configurable");
assert_equals(desc.value, proto[Symbol.unscopables],
this.name + '.prototype[Symbol.unscopables] should be in the descriptor');
assert_equals(typeof desc.value, "object",
this.name + '.prototype[Symbol.unscopables] should be an object');
assert_equals(Object.getPrototypeOf(desc.value), null,
this.name + '.prototype[Symbol.unscopables] should have a null prototype');
assert_equals(Object.getOwnPropertySymbols(desc.value).length,
0,
this.name + '.prototype[Symbol.unscopables] should have the right number of symbol-named properties');
// Check that we do not have _extra_ unscopables. Checking that we
// have all the ones we should will happen in the per-member tests.
var observed = Object.getOwnPropertyNames(desc.value);
for (var prop of observed) {
assert_not_equals(unscopables.indexOf(prop),
-1,
this.name + '.prototype[Symbol.unscopables] has unexpected property "' + prop + '"');
}
} else {
assert_equals(Object.getOwnPropertyDescriptor(this.get_interface_object().prototype, Symbol.unscopables),
undefined,
this.name + '.prototype should not have @@unscopables');
}
}.bind(this), this.name + ' interface: existence and properties of interface prototype object\'s @@unscopables property');
};
IdlInterface.prototype.test_immutable_prototype = function(type, obj)
{
if (typeof Object.setPrototypeOf !== "function") {
return;
}
subsetTestByKey(this.name, test, function(t) {
var originalValue = Object.getPrototypeOf(obj);
var newValue = Object.create(null);
t.add_cleanup(function() {
try {
Object.setPrototypeOf(obj, originalValue);
} catch (err) {}
});
assert_throws_js(TypeError, function() {
Object.setPrototypeOf(obj, newValue);
});
assert_equals(
Object.getPrototypeOf(obj),
originalValue,
"original value not modified"
);
}.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " +
"of " + type + " - setting to a new value via Object.setPrototypeOf " +
"should throw a TypeError");
subsetTestByKey(this.name, test, function(t) {
var originalValue = Object.getPrototypeOf(obj);
var newValue = Object.create(null);
t.add_cleanup(function() {
let setter = Object.getOwnPropertyDescriptor(
Object.prototype, '__proto__'
).set;
try {
setter.call(obj, originalValue);
} catch (err) {}
});
// We need to find the actual setter for the '__proto__' property, so we
// can determine the right global for it. Walk up the prototype chain
// looking for that property until we find it.
let setter;
{
let cur = obj;
while (cur) {
const desc = Object.getOwnPropertyDescriptor(cur, "__proto__");
if (desc) {
setter = desc.set;
break;
}
cur = Object.getPrototypeOf(cur);
}
}
assert_throws_js(globalOf(setter).TypeError, function() {
obj.__proto__ = newValue;
});
assert_equals(
Object.getPrototypeOf(obj),
originalValue,
"original value not modified"
);
}.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " +
"of " + type + " - setting to a new value via __proto__ " +
"should throw a TypeError");
subsetTestByKey(this.name, test, function(t) {
var originalValue = Object.getPrototypeOf(obj);
var newValue = Object.create(null);
t.add_cleanup(function() {
try {
Reflect.setPrototypeOf(obj, originalValue);
} catch (err) {}
});
assert_false(Reflect.setPrototypeOf(obj, newValue));
assert_equals(
Object.getPrototypeOf(obj),
originalValue,
"original value not modified"
);
}.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " +
"of " + type + " - setting to a new value via Reflect.setPrototypeOf " +
"should return false");
subsetTestByKey(this.name, test, function() {
var originalValue = Object.getPrototypeOf(obj);
Object.setPrototypeOf(obj, originalValue);
}.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " +
"of " + type + " - setting to its original value via Object.setPrototypeOf " +
"should not throw");
subsetTestByKey(this.name, test, function() {
var originalValue = Object.getPrototypeOf(obj);
obj.__proto__ = originalValue;
}.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " +
"of " + type + " - setting to its original value via __proto__ " +
"should not throw");
subsetTestByKey(this.name, test, function() {
var originalValue = Object.getPrototypeOf(obj);
assert_true(Reflect.setPrototypeOf(obj, originalValue));
}.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " +
"of " + type + " - setting to its original value via Reflect.setPrototypeOf " +
"should return true");
};
IdlInterface.prototype.test_member_const = function(member)
{
if (!this.has_constants()) {
throw new IdlHarnessError("Internal error: test_member_const called without any constants");
}
subsetTestByKey(this.name, test, function()
{
this.assert_interface_object_exists();
// "For each constant defined on an interface A, there must be
// a corresponding property on the interface object, if it
// exists."
assert_own_property(this.get_interface_object(), member.name);
// "The value of the property is that which is obtained by
// converting the constant’s IDL value to an ECMAScript
// value."
assert_equals(this.get_interface_object()[member.name], constValue(member.value),
"property has wrong value");
// "The property has attributes { [[Writable]]: false,
// [[Enumerable]]: true, [[Configurable]]: false }."
var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), member.name);
assert_false("get" in desc, "property should not have a getter");
assert_false("set" in desc, "property should not have a setter");
assert_false(desc.writable, "property should not be writable");
assert_true(desc.enumerable, "property should be enumerable");
assert_false(desc.configurable, "property should not be configurable");
}.bind(this), this.name + " interface: constant " + member.name + " on interface object");
// "In addition, a property with the same characteristics must
// exist on the interface prototype object."
subsetTestByKey(this.name, test, function()
{
this.assert_interface_object_exists();
if (this.is_callback()) {
assert_false("prototype" in this.get_interface_object(),
this.name + ' should not have a "prototype" property');
return;
}
assert_own_property(this.get_interface_object(), "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
assert_own_property(this.get_interface_object().prototype, member.name);
assert_equals(this.get_interface_object().prototype[member.name], constValue(member.value),
"property has wrong value");
var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), member.name);
assert_false("get" in desc, "property should not have a getter");
assert_false("set" in desc, "property should not have a setter");
assert_false(desc.writable, "property should not be writable");
assert_true(desc.enumerable, "property should be enumerable");
assert_false(desc.configurable, "property should not be configurable");
}.bind(this), this.name + " interface: constant " + member.name + " on interface prototype object");
};
IdlInterface.prototype.test_member_attribute = function(member)
{
if (!shouldRunSubTest(this.name)) {
return;
}
var a_test = subsetTestByKey(this.name, async_test, this.name + " interface: attribute " + member.name);
a_test.step(function()
{
if (!this.should_have_interface_object()) {
a_test.done();
return;
}
this.assert_interface_object_exists();
assert_own_property(this.get_interface_object(), "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
if (member.special === "static") {
assert_own_property(this.get_interface_object(), member.name,
"The interface object must have a property " +
format_value(member.name));
a_test.done();
return;
}
this.do_member_unscopable_asserts(member);
if (this.is_global()) {
assert_own_property(self, member.name,
"The global object must have a property " +
format_value(member.name));
assert_false(member.name in this.get_interface_object().prototype,
"The prototype object should not have a property " +
format_value(member.name));
var getter = Object.getOwnPropertyDescriptor(self, member.name).get;
assert_equals(typeof(getter), "function",
format_value(member.name) + " must have a getter");
// Try/catch around the get here, since it can legitimately throw.
// If it does, we obviously can't check for equality with direct
// invocation of the getter.
var gotValue;
var propVal;
try {
propVal = self[member.name];
gotValue = true;
} catch (e) {
gotValue = false;
}
if (gotValue) {
assert_equals(propVal, getter.call(undefined),
"Gets on a global should not require an explicit this");
}
// do_interface_attribute_asserts must be the last thing we do,
// since it will call done() on a_test.
this.do_interface_attribute_asserts(self, member, a_test);
} else {
assert_true(member.name in this.get_interface_object().prototype,
"The prototype object must have a property " +
format_value(member.name));
if (!member.has_extended_attribute("LegacyLenientThis")) {
if (member.idlType.generic !== "Promise") {
// this.get_interface_object() returns a thing in our global
assert_throws_js(TypeError, function() {
this.get_interface_object().prototype[member.name];
}.bind(this), "getting property on prototype object must throw TypeError");
// do_interface_attribute_asserts must be the last thing we
// do, since it will call done() on a_test.
this.do_interface_attribute_asserts(this.get_interface_object().prototype, member, a_test);
} else {
promise_rejects_js(a_test, TypeError,
this.get_interface_object().prototype[member.name])
.then(a_test.step_func(function() {
// do_interface_attribute_asserts must be the last
// thing we do, since it will call done() on a_test.
this.do_interface_attribute_asserts(this.get_interface_object().prototype,
member, a_test);
}.bind(this)));
}
} else {
assert_equals(this.get_interface_object().prototype[member.name], undefined,
"getting property on prototype object must return undefined");
// do_interface_attribute_asserts must be the last thing we do,
// since it will call done() on a_test.
this.do_interface_attribute_asserts(this.get_interface_object().prototype, member, a_test);
}
}
}.bind(this));
};
IdlInterface.prototype.test_member_operation = function(member)
{
if (!shouldRunSubTest(this.name)) {
return;
}
var a_test = subsetTestByKey(this.name, async_test, this.name + " interface: operation " + member);
a_test.step(function()
{
// This function tests WebIDL as of 2015-12-29.
// https://webidl.spec.whatwg.org/#es-operations
if (!this.should_have_interface_object()) {
a_test.done();
return;
}
this.assert_interface_object_exists();
if (this.is_callback()) {
assert_false("prototype" in this.get_interface_object(),
this.name + ' should not have a "prototype" property');
a_test.done();
return;
}
assert_own_property(this.get_interface_object(), "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "For each unique identifier of an exposed operation defined on the
// interface, there must exist a corresponding property, unless the
// effective overload set for that identifier and operation and with an
// argument count of 0 has no entries."
// TODO: Consider [Exposed].
// "The location of the property is determined as follows:"
var memberHolderObject;
// "* If the operation is static, then the property exists on the
// interface object."
if (member.special === "static") {
assert_own_property(this.get_interface_object(), member.name,
"interface object missing static operation");
memberHolderObject = this.get_interface_object();
// "* Otherwise, [...] if the interface was declared with the [Global]
// extended attribute, then the property exists
// on every object that implements the interface."
} else if (this.is_global()) {
assert_own_property(self, member.name,
"global object missing non-static operation");
memberHolderObject = self;
// "* Otherwise, the property exists solely on the interface’s
// interface prototype object."
} else {
assert_own_property(this.get_interface_object().prototype, member.name,
"interface prototype object missing non-static operation");
memberHolderObject = this.get_interface_object().prototype;
}
this.do_member_unscopable_asserts(member);
this.do_member_operation_asserts(memberHolderObject, member, a_test);
}.bind(this));
};
IdlInterface.prototype.do_member_unscopable_asserts = function(member)
{
// Check that if the member is unscopable then it's in the
// @@unscopables object properly.
if (!member.isUnscopable) {
return;
}
var unscopables = this.get_interface_object().prototype[Symbol.unscopables];
var prop = member.name;
var propDesc = Object.getOwnPropertyDescriptor(unscopables, prop);
assert_equals(typeof propDesc, "object",
this.name + '.prototype[Symbol.unscopables].' + prop + ' must exist')
assert_false("get" in propDesc,
this.name + '.prototype[Symbol.unscopables].' + prop + ' must have no getter');
assert_false("set" in propDesc,
this.name + '.prototype[Symbol.unscopables].' + prop + ' must have no setter');
assert_true(propDesc.writable,
this.name + '.prototype[Symbol.unscopables].' + prop + ' must be writable');
assert_true(propDesc.enumerable,
this.name + '.prototype[Symbol.unscopables].' + prop + ' must be enumerable');
assert_true(propDesc.configurable,
this.name + '.prototype[Symbol.unscopables].' + prop + ' must be configurable');
assert_equals(propDesc.value, true,
this.name + '.prototype[Symbol.unscopables].' + prop + ' must have the value `true`');
};
IdlInterface.prototype.do_member_operation_asserts = function(memberHolderObject, member, a_test)
{
var done = a_test.done.bind(a_test);
var operationUnforgeable = member.isUnforgeable;
var desc = Object.getOwnPropertyDescriptor(memberHolderObject, member.name);
// "The property has attributes { [[Writable]]: B,
// [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the
// operation is unforgeable on the interface, and true otherwise".
assert_false("get" in desc, "property should not have a getter");
assert_false("set" in desc, "property should not have a setter");
assert_equals(desc.writable, !operationUnforgeable,
"property should be writable if and only if not unforgeable");
assert_true(desc.enumerable, "property should be enumerable");
assert_equals(desc.configurable, !operationUnforgeable,
"property should be configurable if and only if not unforgeable");
// "The value of the property is a Function object whose
// behavior is as follows . . ."
assert_equals(typeof memberHolderObject[member.name], "function",
"property must be a function");
const operationOverloads = this.members.filter(function(m) {
return m.type == "operation" && m.name == member.name &&
(m.special === "static") === (member.special === "static");
});
assert_equals(
memberHolderObject[member.name].length,
minOverloadLength(operationOverloads),
"property has wrong .length");
assert_equals(
memberHolderObject[member.name].name,
member.name,
"property has wrong .name");
// Make some suitable arguments
var args = member.arguments.map(function(arg) {
return create_suitable_object(arg.idlType);
});
// "Let O be a value determined as follows:
// ". . .
// "Otherwise, throw a TypeError."
// This should be hit if the operation is not static, there is
// no [ImplicitThis] attribute, and the this value is null.
//
// TODO: We currently ignore the [ImplicitThis] case. Except we manually
// check for globals, since otherwise we'll invoke window.close(). And we
// have to skip this test for anything that on the proto chain of "self",
// since that does in fact have implicit-this behavior.
if (member.special !== "static") {
var cb;
if (!this.is_global() &&
memberHolderObject[member.name] != self[member.name])
{
cb = awaitNCallbacks(2, done);
throwOrReject(a_test, member, memberHolderObject[member.name], null, args,
"calling operation with this = null didn't throw TypeError", cb);
} else {
cb = awaitNCallbacks(1, done);
}
// ". . . If O is not null and is also not a platform object
// that implements interface I, throw a TypeError."
//
// TODO: Test a platform object that implements some other
// interface. (Have to be sure to get inheritance right.)
throwOrReject(a_test, member, memberHolderObject[member.name], {}, args,
"calling operation with this = {} didn't throw TypeError", cb);
} else {
done();
}
}
IdlInterface.prototype.test_to_json_operation = function(desc, memberHolderObject, member) {
var instanceName = memberHolderObject && memberHolderObject.constructor.name
|| member.name + " object";
if (member.has_extended_attribute("Default")) {
subsetTestByKey(this.name, test, function() {
var map = this.default_to_json_operation();
var json = memberHolderObject.toJSON();
map.forEach(function(type, k) {
assert_true(k in json, "property " + JSON.stringify(k) + " should be present in the output of " + this.name + ".prototype.toJSON()");
var descriptor = Object.getOwnPropertyDescriptor(json, k);
assert_true(descriptor.writable, "property " + k + " should be writable");
assert_true(descriptor.configurable, "property " + k + " should be configurable");
assert_true(descriptor.enumerable, "property " + k + " should be enumerable");
this.array.assert_type_is(json[k], type);
delete json[k];
}, this);
}.bind(this), this.name + " interface: default toJSON operation on " + desc);
} else {
subsetTestByKey(this.name, test, function() {
assert_true(this.array.is_json_type(member.idlType), JSON.stringify(member.idlType) + " is not an appropriate return value for the toJSON operation of " + instanceName);
this.array.assert_type_is(memberHolderObject.toJSON(), member.idlType);
}.bind(this), this.name + " interface: toJSON operation on " + desc);
}
};
IdlInterface.prototype.test_member_maplike = function(member) {
subsetTestByKey(this.name, test, () => {
const proto = this.get_interface_object().prototype;
const methods = [
["entries", 0],
["keys", 0],
["values", 0],
["forEach", 1],
["get", 1],
["has", 1]
];
if (!member.readonly) {
methods.push(
["set", 2],
["delete", 1],
["clear", 0]
);
}
for (const [name, length] of methods) {
const desc = Object.getOwnPropertyDescriptor(proto, name);
assert_equals(typeof desc.value, "function", `${name} should be a function`);
assert_equals(desc.enumerable, true, `${name} enumerable`);
assert_equals(desc.configurable, true, `${name} configurable`);
assert_equals(desc.writable, true, `${name} writable`);
assert_equals(desc.value.length, length, `${name} function object length should be ${length}`);
assert_equals(desc.value.name, name, `${name} function object should have the right name`);
}
const iteratorDesc = Object.getOwnPropertyDescriptor(proto, Symbol.iterator);
assert_equals(iteratorDesc.value, proto.entries, `@@iterator should equal entries`);
assert_equals(iteratorDesc.enumerable, false, `@@iterator enumerable`);
assert_equals(iteratorDesc.configurable, true, `@@iterator configurable`);
assert_equals(iteratorDesc.writable, true, `@@iterator writable`);
const sizeDesc = Object.getOwnPropertyDescriptor(proto, "size");
assert_equals(typeof sizeDesc.get, "function", `size getter should be a function`);
assert_equals(sizeDesc.set, undefined, `size should not have a setter`);
assert_equals(sizeDesc.enumerable, true, `size enumerable`);
assert_equals(sizeDesc.configurable, true, `size configurable`);
assert_equals(sizeDesc.get.length, 0, `size getter length`);
assert_equals(sizeDesc.get.name, "get size", `size getter name`);
}, `${this.name} interface: maplike<${member.idlType.map(t => t.idlType).join(", ")}>`);
};
IdlInterface.prototype.test_member_setlike = function(member) {
subsetTestByKey(this.name, test, () => {
const proto = this.get_interface_object().prototype;
const methods = [
["entries", 0],
["keys", 0],
["values", 0],
["forEach", 1],
["has", 1]
];
if (!member.readonly) {
methods.push(
["add", 1],
["delete", 1],
["clear", 0]
);
}
for (const [name, length] of methods) {
const desc = Object.getOwnPropertyDescriptor(proto, name);
assert_equals(typeof desc.value, "function", `${name} should be a function`);
assert_equals(desc.enumerable, true, `${name} enumerable`);
assert_equals(desc.configurable, true, `${name} configurable`);
assert_equals(desc.writable, true, `${name} writable`);
assert_equals(desc.value.length, length, `${name} function object length should be ${length}`);
assert_equals(desc.value.name, name, `${name} function object should have the right name`);
}
const iteratorDesc = Object.getOwnPropertyDescriptor(proto, Symbol.iterator);
assert_equals(iteratorDesc.value, proto.values, `@@iterator should equal values`);
assert_equals(iteratorDesc.enumerable, false, `@@iterator enumerable`);
assert_equals(iteratorDesc.configurable, true, `@@iterator configurable`);
assert_equals(iteratorDesc.writable, true, `@@iterator writable`);
const sizeDesc = Object.getOwnPropertyDescriptor(proto, "size");
assert_equals(typeof sizeDesc.get, "function", `size getter should be a function`);
assert_equals(sizeDesc.set, undefined, `size should not have a setter`);
assert_equals(sizeDesc.enumerable, true, `size enumerable`);
assert_equals(sizeDesc.configurable, true, `size configurable`);
assert_equals(sizeDesc.get.length, 0, `size getter length`);
assert_equals(sizeDesc.get.name, "get size", `size getter name`);
}, `${this.name} interface: setlike<${member.idlType.map(t => t.idlType).join(", ")}>`);
};
IdlInterface.prototype.test_member_iterable = function(member) {
subsetTestByKey(this.name, test, () => {
const isPairIterator = member.idlType.length === 2;
const proto = this.get_interface_object().prototype;
const methods = [
["entries", 0],
["keys", 0],
["values", 0],
["forEach", 1]
];
for (const [name, length] of methods) {
const desc = Object.getOwnPropertyDescriptor(proto, name);
assert_equals(typeof desc.value, "function", `${name} should be a function`);
assert_equals(desc.enumerable, true, `${name} enumerable`);
assert_equals(desc.configurable, true, `${name} configurable`);
assert_equals(desc.writable, true, `${name} writable`);
assert_equals(desc.value.length, length, `${name} function object length should be ${length}`);
assert_equals(desc.value.name, name, `${name} function object should have the right name`);
if (!isPairIterator) {
assert_equals(desc.value, Array.prototype[name], `${name} equality with Array.prototype version`);
}
}
const iteratorDesc = Object.getOwnPropertyDescriptor(proto, Symbol.iterator);
assert_equals(iteratorDesc.enumerable, false, `@@iterator enumerable`);
assert_equals(iteratorDesc.configurable, true, `@@iterator configurable`);
assert_equals(iteratorDesc.writable, true, `@@iterator writable`);
if (isPairIterator) {
assert_equals(iteratorDesc.value, proto.entries, `@@iterator equality with entries`);
} else {
assert_equals(iteratorDesc.value, Array.prototype[Symbol.iterator], `@@iterator equality with Array.prototype version`);
}
}, `${this.name} interface: iterable<${member.idlType.map(t => t.idlType).join(", ")}>`);
};
IdlInterface.prototype.test_member_async_iterable = function(member) {
subsetTestByKey(this.name, test, () => {
const isPairIterator = member.idlType.length === 2;
const proto = this.get_interface_object().prototype;
// Note that although the spec allows arguments, which will be passed to the @@asyncIterator
// method (which is either values or entries), those arguments must always be optional. So
// length of 0 is still correct for values and entries.
const methods = [
["values", 0],
];
if (isPairIterator) {
methods.push(
["entries", 0],
["keys", 0]
);
}
for (const [name, length] of methods) {
const desc = Object.getOwnPropertyDescriptor(proto, name);
assert_equals(typeof desc.value, "function", `${name} should be a function`);
assert_equals(desc.enumerable, true, `${name} enumerable`);
assert_equals(desc.configurable, true, `${name} configurable`);
assert_equals(desc.writable, true, `${name} writable`);
assert_equals(desc.value.length, length, `${name} function object length should be ${length}`);
assert_equals(desc.value.name, name, `${name} function object should have the right name`);
}
const iteratorDesc = Object.getOwnPropertyDescriptor(proto, Symbol.asyncIterator);
assert_equals(iteratorDesc.enumerable, false, `@@iterator enumerable`);
assert_equals(iteratorDesc.configurable, true, `@@iterator configurable`);
assert_equals(iteratorDesc.writable, true, `@@iterator writable`);
if (isPairIterator) {
assert_equals(iteratorDesc.value, proto.entries, `@@iterator equality with entries`);
} else {
assert_equals(iteratorDesc.value, proto.values, `@@iterator equality with values`);
}
}, `${this.name} interface: async iterable<${member.idlType.map(t => t.idlType).join(", ")}>`);
};
IdlInterface.prototype.test_member_stringifier = function(member)
{
subsetTestByKey(this.name, test, function()
{
if (!this.should_have_interface_object()) {
return;
}
this.assert_interface_object_exists();
if (this.is_callback()) {
assert_false("prototype" in this.get_interface_object(),
this.name + ' should not have a "prototype" property');
return;
}
assert_own_property(this.get_interface_object(), "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// ". . . the property exists on the interface prototype object."
var interfacePrototypeObject = this.get_interface_object().prototype;
assert_own_property(interfacePrototypeObject, "toString",
"interface prototype object missing non-static operation");
var stringifierUnforgeable = member.isUnforgeable;
var desc = Object.getOwnPropertyDescriptor(interfacePrototypeObject, "toString");
// "The property has attributes { [[Writable]]: B,
// [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the
// stringifier is unforgeable on the interface, and true otherwise."
assert_false("get" in desc, "property should not have a getter");
assert_false("set" in desc, "property should not have a setter");
assert_equals(desc.writable, !stringifierUnforgeable,
"property should be writable if and only if not unforgeable");
assert_true(desc.enumerable, "property should be enumerable");
assert_equals(desc.configurable, !stringifierUnforgeable,
"property should be configurable if and only if not unforgeable");
// "The value of the property is a Function object, which behaves as
// follows . . ."
assert_equals(typeof interfacePrototypeObject.toString, "function",
"property must be a function");
// "The value of the Function object’s “length” property is the Number
// value 0."
assert_equals(interfacePrototypeObject.toString.length, 0,
"property has wrong .length");
// "Let O be the result of calling ToObject on the this value."
assert_throws_js(globalOf(interfacePrototypeObject.toString).TypeError, function() {
interfacePrototypeObject.toString.apply(null, []);
}, "calling stringifier with this = null didn't throw TypeError");
// "If O is not an object that implements the interface on which the
// stringifier was declared, then throw a TypeError."
//
// TODO: Test a platform object that implements some other
// interface. (Have to be sure to get inheritance right.)
assert_throws_js(globalOf(interfacePrototypeObject.toString).TypeError, function() {
interfacePrototypeObject.toString.apply({}, []);
}, "calling stringifier with this = {} didn't throw TypeError");
}.bind(this), this.name + " interface: stringifier");
};
IdlInterface.prototype.test_members = function()
{
var unexposed_members = new Set();
for (var i = 0; i < this.members.length; i++)
{
var member = this.members[i];
if (member.untested) {
continue;
}
if (!exposed_in(exposure_set(member, this.exposureSet))) {
if (!unexposed_members.has(member.name)) {
unexposed_members.add(member.name);
subsetTestByKey(this.name, test, function() {
// It's not exposed, so we shouldn't find it anywhere.
assert_false(member.name in this.get_interface_object(),
"The interface object must not have a property " +
format_value(member.name));
assert_false(member.name in this.get_interface_object().prototype,
"The prototype object must not have a property " +
format_value(member.name));
}.bind(this), this.name + " interface: member " + member.name);
}
continue;
}
switch (member.type) {
case "const":
this.test_member_const(member);
break;
case "attribute":
// For unforgeable attributes, we do the checks in
// test_interface_of instead.
if (!member.isUnforgeable)
{
this.test_member_attribute(member);
}
if (member.special === "stringifier") {
this.test_member_stringifier(member);
}
break;
case "operation":
// TODO: Need to correctly handle multiple operations with the same
// identifier.
// For unforgeable operations, we do the checks in
// test_interface_of instead.
if (member.name) {
if (!member.isUnforgeable)
{
this.test_member_operation(member);
}
} else if (member.special === "stringifier") {
this.test_member_stringifier(member);
}
break;
case "iterable":
if (member.async) {
this.test_member_async_iterable(member);
} else {
this.test_member_iterable(member);
}
break;
case "maplike":
this.test_member_maplike(member);
break;
case "setlike":
this.test_member_setlike(member);
break;
default:
// TODO: check more member types.
break;
}
}
};
IdlInterface.prototype.test_object = function(desc)
{
var obj, exception = null;
try
{
obj = eval(desc);
}
catch(e)
{
exception = e;
}
var expected_typeof;
if (this.name == "HTMLAllCollection")
{
// Result of [[IsHTMLDDA]] slot
expected_typeof = "undefined";
}
else
{
expected_typeof = "object";
}
if (this.is_callback()) {
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
} else {
this.test_primary_interface_of(desc, obj, exception, expected_typeof);
var current_interface = this;
while (current_interface)
{
if (!(current_interface.name in this.array.members))
{
throw new IdlHarnessError("Interface " + current_interface.name + " not found (inherited by " + this.name + ")");
}
if (current_interface.prevent_multiple_testing && current_interface.already_tested)
{
return;
}
current_interface.test_interface_of(desc, obj, exception, expected_typeof);
current_interface = this.array.members[current_interface.base];
}
}
};
IdlInterface.prototype.test_primary_interface_of = function(desc, obj, exception, expected_typeof)
{
// Only the object itself, not its members, are tested here, so if the
// interface is untested, there is nothing to do.
if (this.untested)
{
return;
}
// "The internal [[SetPrototypeOf]] method of every platform object that
// implements an interface with the [Global] extended
// attribute must execute the same algorithm as is defined for the
// [[SetPrototypeOf]] internal method of an immutable prototype exotic
// object."
// https://webidl.spec.whatwg.org/#platform-object-setprototypeof
if (this.is_global())
{
this.test_immutable_prototype("global platform object", obj);
}
// We can't easily test that its prototype is correct if there's no
// interface object, or the object is from a different global environment
// (not instanceof Object). TODO: test in this case that its prototype at
// least looks correct, even if we can't test that it's actually correct.
if (this.should_have_interface_object()
&& (typeof obj != expected_typeof || obj instanceof Object))
{
subsetTestByKey(this.name, test, function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
this.assert_interface_object_exists();
assert_own_property(this.get_interface_object(), "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "The value of the internal [[Prototype]] property of the
// platform object is the interface prototype object of the primary
// interface from the platform object’s associated global
// environment."
assert_equals(Object.getPrototypeOf(obj),
this.get_interface_object().prototype,
desc + "'s prototype is not " + this.name + ".prototype");
}.bind(this), this.name + " must be primary interface of " + desc);
}
// "The class string of a platform object that implements one or more
// interfaces must be the qualified name of the primary interface of the
// platform object."
subsetTestByKey(this.name, test, function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
assert_class_string(obj, this.get_qualified_name(), "class string of " + desc);
if (!this.has_stringifier())
{
assert_equals(String(obj), "[object " + this.get_qualified_name() + "]", "String(" + desc + ")");
}
}.bind(this), "Stringification of " + desc);
};
IdlInterface.prototype.test_interface_of = function(desc, obj, exception, expected_typeof)
{
// TODO: Indexed and named properties, more checks on interface members
this.already_tested = true;
if (!shouldRunSubTest(this.name)) {
return;
}
var unexposed_properties = new Set();
for (var i = 0; i < this.members.length; i++)
{
var member = this.members[i];
if (member.untested) {
continue;
}
if (!exposed_in(exposure_set(member, this.exposureSet)))
{
if (!unexposed_properties.has(member.name))
{
unexposed_properties.add(member.name);
subsetTestByKey(this.name, test, function() {
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_false(member.name in obj);
}.bind(this), this.name + " interface: " + desc + ' must not have property "' + member.name + '"');
}
continue;
}
if (member.type == "attribute" && member.isUnforgeable)
{
var a_test = subsetTestByKey(this.name, async_test, this.name + " interface: " + desc + ' must have own property "' + member.name + '"');
a_test.step(function() {
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
// Call do_interface_attribute_asserts last, since it will call a_test.done()
this.do_interface_attribute_asserts(obj, member, a_test);
}.bind(this));
}
else if (member.type == "operation" &&
member.name &&
member.isUnforgeable)
{
var a_test = subsetTestByKey(this.name, async_test, this.name + " interface: " + desc + ' must have own property "' + member.name + '"');
a_test.step(function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
assert_own_property(obj, member.name,
"Doesn't have the unforgeable operation property");
this.do_member_operation_asserts(obj, member, a_test);
}.bind(this));
}
else if ((member.type == "const"
|| member.type == "attribute"
|| member.type == "operation")
&& member.name)
{
subsetTestByKey(this.name, test, function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
if (member.special !== "static") {
if (!this.is_global()) {
assert_inherits(obj, member.name);
} else {
assert_own_property(obj, member.name);
}
if (member.type == "const")
{
assert_equals(obj[member.name], constValue(member.value));
}
if (member.type == "attribute")
{
// Attributes are accessor properties, so they might
// legitimately throw an exception rather than returning
// anything.
var property, thrown = false;
try
{
property = obj[member.name];
}
catch (e)
{
thrown = true;
}
if (!thrown)
{
if (this.name == "Document" && member.name == "all")
{
// Result of [[IsHTMLDDA]] slot
assert_equals(typeof property, "undefined");
}
else
{
this.array.assert_type_is(property, member.idlType);
}
}
}
if (member.type == "operation")
{
assert_equals(typeof obj[member.name], "function");
}
}
}.bind(this), this.name + " interface: " + desc + ' must inherit property "' + member + '" with the proper type');
}
// TODO: This is wrong if there are multiple operations with the same
// identifier.
// TODO: Test passing arguments of the wrong type.
if (member.type == "operation" && member.name && member.arguments.length)
{
var description =
this.name + " interface: calling " + member + " on " + desc +
" with too few arguments must throw TypeError";
var a_test = subsetTestByKey(this.name, async_test, description);
a_test.step(function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
var fn;
if (member.special !== "static") {
if (!this.is_global() && !member.isUnforgeable) {
assert_inherits(obj, member.name);
} else {
assert_own_property(obj, member.name);
}
fn = obj[member.name];
}
else
{
assert_own_property(obj.constructor, member.name, "interface object must have static operation as own property");
fn = obj.constructor[member.name];
}
var minLength = minOverloadLength(this.members.filter(function(m) {
return m.type == "operation" && m.name == member.name;
}));
var args = [];
var cb = awaitNCallbacks(minLength, a_test.done.bind(a_test));
for (var i = 0; i < minLength; i++) {
throwOrReject(a_test, member, fn, obj, args, "Called with " + i + " arguments", cb);
args.push(create_suitable_object(member.arguments[i].idlType));
}
if (minLength === 0) {
cb();
}
}.bind(this));
}
if (member.is_to_json_regular_operation()) {
this.test_to_json_operation(desc, obj, member);
}
}
};
IdlInterface.prototype.has_stringifier = function()
{
if (this.name === "DOMException") {
// toString is inherited from Error, so don't assume we have the
// default stringifer
return true;
}
if (this.members.some(function(member) { return member.special === "stringifier"; })) {
return true;
}
if (this.base &&
this.array.members[this.base].has_stringifier()) {
return true;
}
return false;
};
IdlInterface.prototype.do_interface_attribute_asserts = function(obj, member, a_test)
{
// This function tests WebIDL as of 2015-01-27.
// TODO: Consider [Exposed].
// This is called by test_member_attribute() with the prototype as obj if
// it is not a global, and the global otherwise, and by test_interface_of()
// with the object as obj.
var pendingPromises = [];
// "The name of the property is the identifier of the attribute."
assert_own_property(obj, member.name);
// "The property has attributes { [[Get]]: G, [[Set]]: S, [[Enumerable]]:
// true, [[Configurable]]: configurable }, where:
// "configurable is false if the attribute was declared with the
// [LegacyUnforgeable] extended attribute and true otherwise;
// "G is the attribute getter, defined below; and
// "S is the attribute setter, also defined below."
var desc = Object.getOwnPropertyDescriptor(obj, member.name);
assert_false("value" in desc, 'property descriptor should not have a "value" field');
assert_false("writable" in desc, 'property descriptor should not have a "writable" field');
assert_true(desc.enumerable, "property should be enumerable");
if (member.isUnforgeable)
{
assert_false(desc.configurable, "[LegacyUnforgeable] property must not be configurable");
}
else
{
assert_true(desc.configurable, "property must be configurable");
}
// "The attribute getter is a Function object whose behavior when invoked
// is as follows:"
assert_equals(typeof desc.get, "function", "getter must be Function");
// "If the attribute is a regular attribute, then:"
if (member.special !== "static") {
// "If O is not a platform object that implements I, then:
// "If the attribute was specified with the [LegacyLenientThis] extended
// attribute, then return undefined.
// "Otherwise, throw a TypeError."
if (!member.has_extended_attribute("LegacyLenientThis")) {
if (member.idlType.generic !== "Promise") {
assert_throws_js(globalOf(desc.get).TypeError, function() {
desc.get.call({});
}.bind(this), "calling getter on wrong object type must throw TypeError");
} else {
pendingPromises.push(
promise_rejects_js(a_test, TypeError, desc.get.call({}),
"calling getter on wrong object type must reject the return promise with TypeError"));
}
} else {
assert_equals(desc.get.call({}), undefined,
"calling getter on wrong object type must return undefined");
}
}
// "The value of the Function object’s “length” property is the Number
// value 0."
assert_equals(desc.get.length, 0, "getter length must be 0");
// "Let name be the string "get " prepended to attribute’s identifier."
// "Perform ! SetFunctionName(F, name)."
assert_equals(desc.get.name, "get " + member.name,
"getter must have the name 'get " + member.name + "'");
// TODO: Test calling setter on the interface prototype (should throw
// TypeError in most cases).
if (member.readonly
&& !member.has_extended_attribute("LegacyLenientSetter")
&& !member.has_extended_attribute("PutForwards")
&& !member.has_extended_attribute("Replaceable"))
{
// "The attribute setter is undefined if the attribute is declared
// readonly and has neither a [PutForwards] nor a [Replaceable]
// extended attribute declared on it."
assert_equals(desc.set, undefined, "setter must be undefined for readonly attributes");
}
else
{
// "Otherwise, it is a Function object whose behavior when
// invoked is as follows:"
assert_equals(typeof desc.set, "function", "setter must be function for PutForwards, Replaceable, or non-readonly attributes");
// "If the attribute is a regular attribute, then:"
if (member.special !== "static") {
// "If /validThis/ is false and the attribute was not specified
// with the [LegacyLenientThis] extended attribute, then throw a
// TypeError."
// "If the attribute is declared with a [Replaceable] extended
// attribute, then: ..."
// "If validThis is false, then return."
if (!member.has_extended_attribute("LegacyLenientThis")) {
assert_throws_js(globalOf(desc.set).TypeError, function() {
desc.set.call({});
}.bind(this), "calling setter on wrong object type must throw TypeError");
} else {
assert_equals(desc.set.call({}), undefined,
"calling setter on wrong object type must return undefined");
}
}
// "The value of the Function object’s “length” property is the Number
// value 1."
assert_equals(desc.set.length, 1, "setter length must be 1");
// "Let name be the string "set " prepended to id."
// "Perform ! SetFunctionName(F, name)."
assert_equals(desc.set.name, "set " + member.name,
"The attribute setter must have the name 'set " + member.name + "'");
}
Promise.all(pendingPromises).then(a_test.done.bind(a_test));
}
/// IdlInterfaceMember ///
function IdlInterfaceMember(obj)
{
/**
* obj is an object produced by the WebIDLParser.js "ifMember" production.
* We just forward all properties to this object without modification,
* except for special extAttrs handling.
*/
for (var k in obj.toJSON())
{
this[k] = obj[k];
}
if (!("extAttrs" in this))
{
this.extAttrs = [];
}
this.isUnforgeable = this.has_extended_attribute("LegacyUnforgeable");
this.isUnscopable = this.has_extended_attribute("Unscopable");
}
IdlInterfaceMember.prototype = Object.create(IdlObject.prototype);
IdlInterfaceMember.prototype.toJSON = function() {
return this;
};
IdlInterfaceMember.prototype.is_to_json_regular_operation = function() {
return this.type == "operation" && this.special !== "static" && this.name == "toJSON";
};
IdlInterfaceMember.prototype.toString = function() {
function formatType(type) {
var result;
if (type.generic) {
result = type.generic + "<" + type.idlType.map(formatType).join(", ") + ">";
} else if (type.union) {
result = "(" + type.subtype.map(formatType).join(" or ") + ")";
} else {
result = type.idlType;
}
if (type.nullable) {
result += "?"
}
return result;
}
if (this.type === "operation") {
var args = this.arguments.map(function(m) {
return [
m.optional ? "optional " : "",
formatType(m.idlType),
m.variadic ? "..." : "",
].join("");
}).join(", ");
return this.name + "(" + args + ")";
}
return this.name;
}
/// Internal helper functions ///
function create_suitable_object(type)
{
/**
* type is an object produced by the WebIDLParser.js "type" production. We
* return a JavaScript value that matches the type, if we can figure out
* how.
*/
if (type.nullable)
{
return null;
}
switch (type.idlType)
{
case "any":
case "boolean":
return true;
case "byte": case "octet": case "short": case "unsigned short":
case "long": case "unsigned long": case "long long":
case "unsigned long long": case "float": case "double":
case "unrestricted float": case "unrestricted double":
return 7;
case "DOMString":
case "ByteString":
case "USVString":
return "foo";
case "object":
return {a: "b"};
case "Node":
return document.createTextNode("abc");
}
return null;
}
/// IdlEnum ///
// Used for IdlArray.prototype.assert_type_is
function IdlEnum(obj)
{
/**
* obj is an object produced by the WebIDLParser.js "dictionary"
* production.
*/
/** Self-explanatory. */
this.name = obj.name;
/** An array of values produced by the "enum" production. */
this.values = obj.values;
}
IdlEnum.prototype = Object.create(IdlObject.prototype);
/// IdlCallback ///
// Used for IdlArray.prototype.assert_type_is
function IdlCallback(obj)
{
/**
* obj is an object produced by the WebIDLParser.js "callback"
* production.
*/
/** Self-explanatory. */
this.name = obj.name;
/** Arguments for the callback. */
this.arguments = obj.arguments;
}
IdlCallback.prototype = Object.create(IdlObject.prototype);
/// IdlTypedef ///
// Used for IdlArray.prototype.assert_type_is
function IdlTypedef(obj)
{
/**
* obj is an object produced by the WebIDLParser.js "typedef"
* production.
*/
/** Self-explanatory. */
this.name = obj.name;
/** The idlType that we are supposed to be typedeffing to. */
this.idlType = obj.idlType;
}
IdlTypedef.prototype = Object.create(IdlObject.prototype);
/// IdlNamespace ///
function IdlNamespace(obj)
{
this.name = obj.name;
this.extAttrs = obj.extAttrs;
this.untested = obj.untested;
/** A back-reference to our IdlArray. */
this.array = obj.array;
/** An array of IdlInterfaceMembers. */
this.members = obj.members.map(m => new IdlInterfaceMember(m));
}
IdlNamespace.prototype = Object.create(IdlObject.prototype);
IdlNamespace.prototype.do_member_operation_asserts = function (memberHolderObject, member, a_test)
{
var desc = Object.getOwnPropertyDescriptor(memberHolderObject, member.name);
assert_false("get" in desc, "property should not have a getter");
assert_false("set" in desc, "property should not have a setter");
assert_equals(
desc.writable,
!member.isUnforgeable,
"property should be writable if and only if not unforgeable");
assert_true(desc.enumerable, "property should be enumerable");
assert_equals(
desc.configurable,
!member.isUnforgeable,
"property should be configurable if and only if not unforgeable");
assert_equals(
typeof memberHolderObject[member.name],
"function",
"property must be a function");
assert_equals(
memberHolderObject[member.name].length,
minOverloadLength(this.members.filter(function(m) {
return m.type == "operation" && m.name == member.name;
})),
"operation has wrong .length");
a_test.done();
}
IdlNamespace.prototype.test_member_operation = function(member)
{
if (!shouldRunSubTest(this.name)) {
return;
}
var a_test = subsetTestByKey(
this.name,
async_test,
this.name + ' namespace: operation ' + member);
a_test.step(function() {
assert_own_property(
self[this.name],
member.name,
'namespace object missing operation ' + format_value(member.name));
this.do_member_operation_asserts(self[this.name], member, a_test);
}.bind(this));
};
IdlNamespace.prototype.test_member_attribute = function (member)
{
if (!shouldRunSubTest(this.name)) {
return;
}
var a_test = subsetTestByKey(
this.name,
async_test,
this.name + ' namespace: attribute ' + member.name);
a_test.step(function()
{
assert_own_property(
self[this.name],
member.name,
this.name + ' does not have property ' + format_value(member.name));
var desc = Object.getOwnPropertyDescriptor(self[this.name], member.name);
assert_equals(desc.set, undefined, "setter must be undefined for namespace members");
a_test.done();
}.bind(this));
};
IdlNamespace.prototype.test_self = function ()
{
/**
* TODO(lukebjerring): Assert:
* - "Note that unlike interfaces or dictionaries, namespaces do not create types."
*/
subsetTestByKey(this.name, test, () => {
assert_true(this.extAttrs.every(o => o.name === "Exposed" || o.name === "SecureContext"),
"Only the [Exposed] and [SecureContext] extended attributes are applicable to namespaces");
assert_true(this.has_extended_attribute("Exposed"),
"Namespaces must be annotated with the [Exposed] extended attribute");
}, `${this.name} namespace: extended attributes`);
const namespaceObject = self[this.name];
subsetTestByKey(this.name, test, () => {
const desc = Object.getOwnPropertyDescriptor(self, this.name);
assert_equals(desc.value, namespaceObject, `wrong value for ${this.name} namespace object`);
assert_true(desc.writable, "namespace object should be writable");
assert_false(desc.enumerable, "namespace object should not be enumerable");
assert_true(desc.configurable, "namespace object should be configurable");
assert_false("get" in desc, "namespace object should not have a getter");
assert_false("set" in desc, "namespace object should not have a setter");
}, `${this.name} namespace: property descriptor`);
subsetTestByKey(this.name, test, () => {
assert_true(Object.isExtensible(namespaceObject));
}, `${this.name} namespace: [[Extensible]] is true`);
subsetTestByKey(this.name, test, () => {
assert_true(namespaceObject instanceof Object);
if (this.name === "console") {
// https://console.spec.whatwg.org/#console-namespace
const namespacePrototype = Object.getPrototypeOf(namespaceObject);
assert_equals(Reflect.ownKeys(namespacePrototype).length, 0);
assert_equals(Object.getPrototypeOf(namespacePrototype), Object.prototype);
} else {
assert_equals(Object.getPrototypeOf(namespaceObject), Object.prototype);
}
}, `${this.name} namespace: [[Prototype]] is Object.prototype`);
subsetTestByKey(this.name, test, () => {
assert_equals(typeof namespaceObject, "object");
}, `${this.name} namespace: typeof is "object"`);
subsetTestByKey(this.name, test, () => {
assert_equals(
Object.getOwnPropertyDescriptor(namespaceObject, "length"),
undefined,
"length property must be undefined"
);
}, `${this.name} namespace: has no length property`);
subsetTestByKey(this.name, test, () => {
assert_equals(
Object.getOwnPropertyDescriptor(namespaceObject, "name"),
undefined,
"name property must be undefined"
);
}, `${this.name} namespace: has no name property`);
};
IdlNamespace.prototype.test = function ()
{
if (!this.untested) {
this.test_self();
}
for (const v of Object.values(this.members)) {
switch (v.type) {
case 'operation':
this.test_member_operation(v);
break;
case 'attribute':
this.test_member_attribute(v);
break;
default:
throw 'Invalid namespace member ' + v.name + ': ' + v.type + ' not supported';
}
};
};
}());
/**
* idl_test is a promise_test wrapper that handles the fetching of the IDL,
* avoiding repetitive boilerplate.
*
* @param {String[]} srcs Spec name(s) for source idl files (fetched from
* /interfaces/{name}.idl).
* @param {String[]} deps Spec name(s) for dependency idl files (fetched
* from /interfaces/{name}.idl). Order is important - dependencies from
* each source will only be included if they're already know to be a
* dependency (i.e. have already been seen).
* @param {Function} setup_func Function for extra setup of the idl_array, such
* as adding objects. Do not call idl_array.test() in the setup; it is
* called by this function (idl_test).
*/
function idl_test(srcs, deps, idl_setup_func) {
return promise_test(function (t) {
var idl_array = new IdlArray();
var setup_error = null;
const validationIgnored = [
"constructor-member",
"dict-arg-default",
"require-exposed"
];
return Promise.all(
srcs.concat(deps).map(fetch_spec))
.then(function(results) {
const astArray = results.map(result =>
WebIDL2.parse(result.idl, { sourceName: result.spec })
);
test(() => {
const validations = WebIDL2.validate(astArray)
.filter(v => !validationIgnored.includes(v.ruleName));
if (validations.length) {
const message = validations.map(v => v.message).join("\n\n");
throw new Error(message);
}
}, "idl_test validation");
for (var i = 0; i < srcs.length; i++) {
idl_array.internal_add_idls(astArray[i]);
}
for (var i = srcs.length; i < srcs.length + deps.length; i++) {
idl_array.internal_add_dependency_idls(astArray[i]);
}
})
.then(function() {
if (idl_setup_func) {
return idl_setup_func(idl_array, t);
}
})
.catch(function(e) { setup_error = e || 'IDL setup failed.'; })
.then(function () {
var error = setup_error;
try {
idl_array.test(); // Test what we can.
} catch (e) {
// If testing fails hard here, the original setup error
// is more likely to be the real cause.
error = error || e;
}
if (error) {
throw error;
}
});
}, 'idl_test setup');
}
/**
* fetch_spec is a shorthand for a Promise that fetches the spec's content.
*/
function fetch_spec(spec) {
var url = '/interfaces/' + spec + '.idl';
return fetch(url).then(function (r) {
if (!r.ok) {
throw new IdlHarnessError("Error fetching " + url + ".");
}
return r.text();
}).then(idl => ({ spec, idl }));
}
// vim: set expandtab shiftwidth=4 tabstop=4 foldmarker=@{,@} foldmethod=marker:
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