// Feature test to avoid timeouts
function assert_permissions_policy_supported() {
assert_true("allow" in HTMLIFrameElement.prototype, 'permissions policy is supported');
}
// Tests whether a feature that is enabled/disabled by permissions policy works
// as expected.
// Arguments:
// feature_descriptionOrObject: either and object, containing the following
// properties, or a string describing what feature is being tested.
// Examples: "usb.GetDevices()", "PaymentRequest()".
// test: test created by testharness. Examples: async_test, promise_test.
// src: URL where a feature's availability is checked. Examples:
// "/permissions-policy/resources/permissions-policy-payment.html",
// "/permissions-policy/resources/permissions-policy-usb.html".
// expect_feature_available: a callback(data, feature_description) to
// verify if a feature is available or unavailable as expected.
// The file under the path "src" defines what "data" is sent back via
// postMessage with type: 'availability-result'.
// Inside the callback, some tests (e.g., EXPECT_EQ, EXPECT_TRUE, etc)
// are run accordingly to test a feature's availability.
// Example: expect_feature_available_default(data, feature_description).
// feature_name: Optional argument, only provided when testing iframe allow
// attribute. "feature_name" is the feature name of a policy controlled
// feature (https://w3c.github.io/webappsec-permissions-policy/#features).
// See examples at:
// https://github.com/w3c/webappsec-permissions-policy/blob/main/features.md
// allowfullscreen: Optional argument, only used for testing fullscreen
// by passing "allowfullscreen".
// is_promise_test: Optional argument, true if this call should return a
// promise. Used by test_feature_availability_with_post_message_result()
function test_feature_availability(
feature_descriptionOrObject, test, src, expect_feature_available, feature_name,
allowfullscreen, is_promise_test = false, needs_focus = false) {
if (feature_descriptionOrObject && feature_descriptionOrObject instanceof Object) {
const {
feature_description,
test,
src,
expect_feature_available,
feature_name,
allowfullscreen,
is_promise_test,
needs_focus,
} = feature_descriptionOrObject;
return test_feature_availability(
feature_description,
test,
src,
expect_feature_available,
feature_name,
allowfullscreen,
is_promise_test,
needs_focus,
);
}
const feature_description = feature_descriptionOrObject;
let frame = document.createElement('iframe');
frame.src = src;
if (typeof feature_name !== 'undefined') {
frame.allow = frame.allow.concat(";" + feature_name);
}
if (typeof allowfullscreen !== 'undefined') {
frame.setAttribute(allowfullscreen, true);
}
function expectFeatureAvailable(evt) {
if (evt.source === frame.contentWindow &&
evt.data.type === 'availability-result') {
expect_feature_available(evt.data, feature_description);
document.body.removeChild(frame);
test.done();
}
}
if (!is_promise_test) {
window.addEventListener('message', test.step_func(expectFeatureAvailable));
document.body.appendChild(frame);
return;
}
const promise = new Promise((resolve) => {
window.addEventListener('message', resolve);
}).then(expectFeatureAvailable);
document.body.appendChild(frame);
if (needs_focus) {
frame.focus();
}
return promise;
}
// Default helper functions to test a feature's availability:
function expect_feature_available_default(data, feature_description) {
assert_true(data.enabled, feature_description);
}
function expect_feature_unavailable_default(data, feature_description) {
assert_false(data.enabled, feature_description);
}
// This is the same as test_feature_availability() but instead of passing in a
// function to check the result of the message sent back from an iframe, instead
// just compares the result to an expected result passed in.
// Arguments:
// test: test created by testharness. Examples: async_test, promise_test.
// src: the URL to load in an iframe in which to test the feature.
// expected_result: the expected value to compare to the data passed back
// from the src page by postMessage.
// allow_attribute: Optional argument, only provided when an allow
// attribute should be specified on the iframe.
function test_feature_availability_with_post_message_result(
test, src, expected_result, allow_attribute) {
const test_result = ({ name, message }, feature_description) => {
assert_equals(name, expected_result, message + '.');
};
return test_feature_availability(
null, test, src, test_result, allow_attribute, undefined, true);
}
// If this page is intended to test the named feature (according to the URL),
// tests the feature availability and posts the result back to the parent.
// Otherwise, does nothing.
async function test_feature_in_iframe(feature_name, feature_promise_factory) {
if (location.hash.endsWith(`#${feature_name}`)) {
let message = 'Available';
let name = '#OK';
try {
await feature_promise_factory();
} catch (e) {
({ name, message } = e);
}
window.parent.postMessage(
{ type: 'availability-result', name, message }, '*');
}
}
// Returns true if the URL for this page indicates that it is embedded in an
// iframe.
function page_loaded_in_iframe() {
return new URLSearchParams(location.search).get('in-iframe');
}
// Returns a same-origin (relative) URL suitable for embedding in an iframe for
// testing the availability of the feature.
function same_origin_url(feature_name) {
// Add an "in-iframe" query parameter so that we can detect the iframe'd
// version of the page and testharness script loading can be disabled in
// that version, as required for use of testdriver in non-toplevel browsing
// contexts.
return location.pathname + '?in-iframe=yes#' + feature_name;
}
// Returns a cross-origin (absolute) URL suitable for embedding in an iframe for
// testing the availability of the feature.
function cross_origin_url(base_url, feature_name) {
return base_url + same_origin_url(feature_name);
}
// This function runs all permissions policy tests for a particular feature that
// has a default policy of "self". This includes testing:
// 1. Feature usage succeeds by default in the top level frame.
// 2. Feature usage succeeds by default in a same-origin iframe.
// 3. Feature usage fails by default in a cross-origin iframe.
// 4. Feature usage succeeds when an allow attribute is specified on a
// cross-origin iframe.
// 5. Feature usage fails when an allow attribute is specified on a
// same-origin iframe with a value of "feature-name 'none'".
//
// The same page which called this function will be loaded in the iframe in
// order to test feature usage there. When this function is called in that
// context it will simply run the feature and return a result back via
// postMessage.
//
// Arguments:
// cross_origin: A cross-origin URL base to be used to load the page which
// called into this function.
// feature_name: The name of the feature as it should be specified in an
// allow attribute.
// error_name: If feature usage does not succeed, this is the string
// representation of the error that will be passed in the rejected
// promise.
// feature_promise_factory: A function which returns a promise which tests
// feature usage. If usage succeeds, the promise should resolve. If it
// fails, the promise should reject with an error that can be
// represented as a string.
function run_all_fp_tests_allow_self(
cross_origin, feature_name, error_name, feature_promise_factory) {
// This may be the version of the page loaded up in an iframe. If so, just
// post the result of running the feature promise back to the parent.
if (page_loaded_in_iframe()) {
test_feature_in_iframe(feature_name, feature_promise_factory);
return;
}
// Run the various tests.
// 1. Allowed in top-level frame.
promise_test(
() => feature_promise_factory(),
'Default "' + feature_name +
'" permissions policy ["self"] allows the top-level document.');
// 2. Allowed in same-origin iframe.
const same_origin_frame_pathname = same_origin_url(feature_name);
promise_test(
t => {
return test_feature_availability_with_post_message_result(
t, same_origin_frame_pathname, '#OK');
},
'Default "' + feature_name +
'" permissions policy ["self"] allows same-origin iframes.');
// 3. Blocked in cross-origin iframe.
const cross_origin_frame_url = cross_origin_url(cross_origin, feature_name);
promise_test(
t => {
return test_feature_availability_with_post_message_result(
t, cross_origin_frame_url, error_name);
},
'Default "' + feature_name +
'" permissions policy ["self"] disallows cross-origin iframes.');
// 4. Allowed in cross-origin iframe with "allow" attribute.
promise_test(
t => {
return test_feature_availability_with_post_message_result(
t, cross_origin_frame_url, '#OK', feature_name);
},
'permissions policy "' + feature_name +
'" can be enabled in cross-origin iframes using "allow" attribute.');
// 5. Blocked in same-origin iframe with "allow" attribute set to 'none'.
promise_test(
t => {
return test_feature_availability_with_post_message_result(
t, same_origin_frame_pathname, error_name,
feature_name + ' \'none\'');
},
'permissions policy "' + feature_name +
'" can be disabled in same-origin iframes using "allow" attribute.');
}
// This function runs all permissions policy tests for a particular feature that
// has a default policy of "*". This includes testing:
// 1. Feature usage succeeds by default in the top level frame.
// 2. Feature usage succeeds by default in a same-origin iframe.
// 3. Feature usage succeeds by default in a cross-origin iframe.
// 4. Feature usage fails when an allow attribute is specified on a
// cross-origin iframe with a value of "feature-name 'none'".
// 5. Feature usage fails when an allow attribute is specified on a
// same-origin iframe with a value of "feature-name 'none'".
//
// The same page which called this function will be loaded in the iframe in
// order to test feature usage there. When this function is called in that
// context it will simply run the feature and return a result back via
// postMessage.
//
// Arguments:
// cross_origin: A cross-origin URL base to be used to load the page which
// called into this function.
// feature_name: The name of the feature as it should be specified in an
// allow attribute.
// error_name: If feature usage does not succeed, this is the string
// representation of the error that will be passed in the rejected
// promise.
// feature_promise_factory: A function which returns a promise which tests
// feature usage. If usage succeeds, the promise should resolve. If it
// fails, the promise should reject with an error that can be
// represented as a string.
function run_all_fp_tests_allow_all(
cross_origin, feature_name, error_name, feature_promise_factory) {
// This may be the version of the page loaded up in an iframe. If so, just
// post the result of running the feature promise back to the parent.
if (page_loaded_in_iframe()) {
test_feature_in_iframe(feature_name, feature_promise_factory);
return;
}
// Run the various tests.
// 1. Allowed in top-level frame.
promise_test(
() => feature_promise_factory(),
'Default "' + feature_name +
'" permissions policy ["*"] allows the top-level document.');
// 2. Allowed in same-origin iframe.
const same_origin_frame_pathname = same_origin_url(feature_name);
promise_test(
t => {
return test_feature_availability_with_post_message_result(
t, same_origin_frame_pathname, '#OK');
},
'Default "' + feature_name +
'" permissions policy ["*"] allows same-origin iframes.');
// 3. Allowed in cross-origin iframe.
const cross_origin_frame_url = cross_origin_url(cross_origin, feature_name);
promise_test(
t => {
return test_feature_availability_with_post_message_result(
t, cross_origin_frame_url, '#OK');
},
'Default "' + feature_name +
'" permissions policy ["*"] allows cross-origin iframes.');
// 4. Blocked in cross-origin iframe with "allow" attribute set to 'none'.
promise_test(
t => {
return test_feature_availability_with_post_message_result(
t, cross_origin_frame_url, error_name, feature_name + ' \'none\'');
},
'permissions policy "' + feature_name +
'" can be disabled in cross-origin iframes using "allow" attribute.');
// 5. Blocked in same-origin iframe with "allow" attribute set to 'none'.
promise_test(
t => {
return test_feature_availability_with_post_message_result(
t, same_origin_frame_pathname, error_name,
feature_name + ' \'none\'');
},
'permissions policy "' + feature_name +
'" can be disabled in same-origin iframes using "allow" attribute.');
}
// This function tests that a subframe's document policy allows a given feature.
// A feature is allowed in a frame either through inherited policy or specified
// by iframe allow attribute.
// Arguments:
// test: test created by testharness. Examples: async_test, promise_test.
// feature: feature name that should be allowed in the frame.
// src: the URL to load in the frame.
// allow: the allow attribute (container policy) of the iframe
function test_allowed_feature_for_subframe(message, feature, src, allow) {
let frame = document.createElement('iframe');
if (typeof allow !== 'undefined') {
frame.allow = allow;
}
promise_test(function() {
assert_permissions_policy_supported();
frame.src = src;
return new Promise(function(resolve, reject) {
window.addEventListener('message', function handler(evt) {
resolve(evt.data);
}, { once: true });
document.body.appendChild(frame);
}).then(function(data) {
assert_true(data.includes(feature), feature);
});
}, message);
}
// This function tests that a subframe's document policy disallows a given
// feature. A feature is allowed in a frame either through inherited policy or
// specified by iframe allow attribute.
// Arguments:
// test: test created by testharness. Examples: async_test, promise_test.
// feature: feature name that should not be allowed in the frame.
// src: the URL to load in the frame.
// allow: the allow attribute (container policy) of the iframe
function test_disallowed_feature_for_subframe(message, feature, src, allow) {
let frame = document.createElement('iframe');
if (typeof allow !== 'undefined') {
frame.allow = allow;
}
promise_test(function() {
assert_permissions_policy_supported();
frame.src = src;
return new Promise(function(resolve, reject) {
window.addEventListener('message', function handler(evt) {
resolve(evt.data);
}, { once: true });
document.body.appendChild(frame);
}).then(function(data) {
assert_false(data.includes(feature), feature);
});
}, message);
}
// This function tests that a subframe with header policy defined on a given
// feature allows and disallows the feature as expected.
// Arguments:
// feature: feature name.
// frame_header_policy: either *, self or \\(\\), defines the frame
// document's header policy on |feature|.
// '(' and ')' need to be escaped because of server end
// header parameter syntax limitation.
// src: the URL to load in the frame.
// test_expects: contains 6 expected results of either |feature| is allowed
// or not inside of a local or remote iframe nested inside
// the subframe given the header policy to be either *,
// self, or ().
// test_name: name of the test.
function test_subframe_header_policy(
feature, frame_header_policy, src, test_expects, test_name) {
let frame = document.createElement('iframe');
promise_test(function() {
assert_permissions_policy_supported()
frame.src = src + '?pipe=sub|header(Permissions-Policy,' + feature + '='
+ frame_header_policy + ')';
return new Promise(function(resolve) {
window.addEventListener('message', function handler(evt) {
resolve(evt.data);
});
document.body.appendChild(frame);
}).then(function(results) {
for (var j = 0; j < results.length; j++) {
var data = results[j];
function test_result(message, test_expect) {
if (test_expect) {
assert_true(data.allowedfeatures.includes(feature), message);
} else {
assert_false(data.allowedfeatures.includes(feature), message);
}
}
if (data.frame === 'local') {
if (data.policy === '*') {
test_result('local_all:', test_expects.local_all);
}
if (data.policy === 'self') {
test_result('local_self:', test_expects.local_self);
}
if (data.policy === '\\(\\)') {
test_result('local_none:', test_expects.local_none);
}
}
if (data.frame === 'remote') {
if (data.policy === '*') {
test_result('remote_all:', test_expects.remote_all);
}
if (data.policy === 'self') {
test_result('remote_self:', test_expects.remote_self);
}
if (data.policy === '\\(\\)') {
test_result('remote_none:', test_expects.remote_none);
}
}
}
});
}, test_name);
}
// This function tests that frame policy allows a given feature correctly. A
// feature is allowed in a frame either through inherited policy or specified
// by iframe allow attribute.
// Arguments:
// feature: feature name.
// src: the URL to load in the frame. If undefined, the iframe will have a
// srcdoc="" attribute
// test_expect: boolean value of whether the feature should be allowed.
// allow: optional, the allow attribute (container policy) of the iframe.
// allowfullscreen: optional, boolean value of allowfullscreen attribute.
// sandbox: optional boolean. If true, the frame will be sandboxed (with
// allow-scripts, so that tests can run in it.)
function test_frame_policy(
feature, src, srcdoc, test_expect, allow, allowfullscreen, sandbox) {
let frame = document.createElement('iframe');
document.body.appendChild(frame);
// frame_policy should be dynamically updated as allow and allowfullscreen is
// updated.
var frame_policy = frame.permissionsPolicy;
if (typeof allow !== 'undefined') {
frame.setAttribute('allow', allow);
}
if (!!allowfullscreen) {
frame.setAttribute('allowfullscreen', true);
}
if (!!sandbox) {
frame.setAttribute('sandbox', 'allow-scripts');
}
if (!!src) {
frame.src = src;
}
if (!!srcdoc) {
frame.srcdoc = "<h1>Hello world!</h1>";
}
if (test_expect) {
assert_true(frame_policy.allowedFeatures().includes(feature));
} else {
assert_false(frame_policy.allowedFeatures().includes(feature));
}
}
function expect_reports(report_count, policy_name, description) {
async_test(t => {
var num_received_reports = 0;
new ReportingObserver(t.step_func((reports, observer) => {
const relevant_reports = reports.filter(r => (r.body.featureId === policy_name));
num_received_reports += relevant_reports.length;
if (num_received_reports >= report_count) {
t.done();
}
}), {types: ['permissions-policy-violation'], buffered: true}).observe();
}, description);
}
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