/**
* @license
* Copyright The Closure Library Authors.
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('goog.testing.asserts');
goog.setTestOnly();
goog.require('goog.dom.safe');
goog.require('goog.html.uncheckedconversions');
goog.require('goog.string');
goog.require('goog.string.Const');
goog.require('goog.testing.JsUnitException');
var DOUBLE_EQUALITY_PREDICATE = function(var1, var2) {
'use strict';
return var1 == var2;
};
var JSUNIT_UNDEFINED_VALUE = void 0;
var TO_STRING_EQUALITY_PREDICATE = function(var1, var2) {
'use strict';
return var1.toString() === var2.toString();
};
var OUTPUT_NEW_LINE_THRESHOLD = 40;
/** @typedef {function(?, ?):boolean} */
var PredicateFunctionType;
/**
* An associative array of constructors corresponding to primitive and
* well-known JS types.
* @const {!Array<string>}
*/
const PRIMITIVE_TRUE_TYPES =
['String', 'Boolean', 'Number', 'Array', 'RegExp', 'Date', 'Function'];
if (typeof ArrayBuffer === 'function') {
PRIMITIVE_TRUE_TYPES.push('ArrayBuffer');
}
/**
* @const {{
* String : !PredicateFunctionType,
* Number : !PredicateFunctionType,
* Boolean : !PredicateFunctionType,
* Date : !PredicateFunctionType,
* RegExp : !PredicateFunctionType,
* Function : !PredicateFunctionType,
* TrustedHTML : !PredicateFunctionType,
* TrustedScript : !PredicateFunctionType,
* TrustedScriptURL : !PredicateFunctionType
* }}
*/
const EQUALITY_PREDICATES = {
'String': DOUBLE_EQUALITY_PREDICATE,
'Number': DOUBLE_EQUALITY_PREDICATE,
'Bigint': DOUBLE_EQUALITY_PREDICATE,
'Boolean': DOUBLE_EQUALITY_PREDICATE,
'Date': function(date1, date2) {
'use strict';
return date1.getTime() == date2.getTime();
},
'RegExp': TO_STRING_EQUALITY_PREDICATE,
'Function': TO_STRING_EQUALITY_PREDICATE,
'TrustedHTML': TO_STRING_EQUALITY_PREDICATE,
'TrustedScript': TO_STRING_EQUALITY_PREDICATE,
'TrustedScriptURL': TO_STRING_EQUALITY_PREDICATE
};
/**
* Compares equality of two numbers, allowing them to differ up to a given
* tolerance.
* @param {number} var1 A number.
* @param {number} var2 A number.
* @param {number} tolerance the maximum allowed difference.
* @return {boolean} Whether the two variables are sufficiently close.
* @private
*/
goog.testing.asserts.numberRoughEqualityPredicate_ = function(
var1, var2, tolerance) {
'use strict';
return Math.abs(var1 - var2) <= tolerance;
};
/**
* @type {!Object<string, function(?, ?, number): boolean>}
* @private
*/
goog.testing.asserts.primitiveRoughEqualityPredicates_ = {
'Number': goog.testing.asserts.numberRoughEqualityPredicate_
};
var _trueTypeOf = function(something) {
'use strict';
let result = typeof something;
try {
switch (result) {
case 'string':
break;
case 'boolean':
break;
case 'number':
break;
case 'object':
if (something == null) {
result = 'null';
break;
}
case 'function':
let foundConstructor = false;
for (let i = 0; i < PRIMITIVE_TRUE_TYPES.length; i++) {
// NOTE: this cannot be a for-of loop because it's used from Rhino
// without the necessary Array.prototype[Symbol.iterator] polyfill.
const trueType = PRIMITIVE_TRUE_TYPES[i];
if (something.constructor === goog.global[trueType]) {
result = trueType;
foundConstructor = true;
break;
}
}
// Constructor doesn't match any of the known "primitive" constructors.
if (!foundConstructor) {
const m =
something.constructor.toString().match(/function\s*([^( ]+)\(/);
if (m) {
result = m[1];
}
}
break;
}
} catch (e) {
} finally {
result = result.substr(0, 1).toUpperCase() + result.substr(1);
}
return result;
};
var _displayStringForValue = function(aVar) {
'use strict';
var result;
try {
result = '<' + String(aVar) + '>';
} catch (ex) {
result = '<toString failed: ' + ex.message + '>';
// toString does not work on this object :-(
}
if (!(aVar === null || aVar === JSUNIT_UNDEFINED_VALUE)) {
result += ' (' + _trueTypeOf(aVar) + ')';
}
return result;
};
/** @param {?} failureMessage */
goog.testing.asserts.fail = function(failureMessage) {
'use strict';
_assert('Call to fail()', false, failureMessage);
};
/**
* @const
* @suppress {duplicate,checkTypes} Test frameworks like Jasmine may also
* define global fail functions.
*/
var fail = goog.testing.asserts.fail;
var argumentsIncludeComments = function(expectedNumberOfNonCommentArgs, args) {
'use strict';
return args.length == expectedNumberOfNonCommentArgs + 1;
};
var commentArg = function(expectedNumberOfNonCommentArgs, args) {
'use strict';
if (argumentsIncludeComments(expectedNumberOfNonCommentArgs, args)) {
return args[0];
}
return null;
};
var nonCommentArg = function(
desiredNonCommentArgIndex, expectedNumberOfNonCommentArgs, args) {
'use strict';
return argumentsIncludeComments(expectedNumberOfNonCommentArgs, args) ?
args[desiredNonCommentArgIndex] :
args[desiredNonCommentArgIndex - 1];
};
var _validateArguments = function(expectedNumberOfNonCommentArgs, args) {
'use strict';
var valid = args.length == expectedNumberOfNonCommentArgs ||
args.length == expectedNumberOfNonCommentArgs + 1 &&
typeof args[0] === 'string';
if (!valid) {
goog.testing.asserts.raiseException(
'Incorrect arguments passed to assert function.\n' +
'Expected ' + expectedNumberOfNonCommentArgs + ' argument(s) plus ' +
'optional comment; got ' + args.length + '.');
}
};
/**
* @return {?} goog.testing.TestCase or null
* We suppress the lint error and we explicitly do not goog.require()
* goog.testing.TestCase to avoid a build time dependency cycle.
* @suppress {missingRequire|undefinedNames|undefinedVars|missingProperties}
* @private
*/
var _getCurrentTestCase = function() {
'use strict';
// Some users of goog.testing.asserts do not use goog.testing.TestRunner and
// they do not include goog.testing.TestCase. Exceptions will not be
// completely correct for these users.
if (!goog.testing.TestCase) {
if (goog.global.console) {
goog.global.console.error(
'Missing goog.testing.TestCase, ' +
'add /* @suppress {extraRequire} */' +
'goog.require(\'goog.testing.TestCase\')');
}
return null;
}
return goog.testing.TestCase.getActiveTestCase();
};
var _assert = function(comment, booleanValue, failureMessage) {
'use strict';
// If another framework has installed an adapter, tell it about the assertion.
var adapter =
typeof window !== 'undefined' && window['Closure assert adapter'];
if (adapter) {
adapter['assertWithMessage'](
booleanValue,
goog.testing.JsUnitException.generateMessage(comment, failureMessage));
// Also throw an error, for callers that assume that asserts throw. We don't
// include error details to avoid duplicate failure messages.
if (!booleanValue) throw new Error('goog.testing assertion failed');
}
if (!booleanValue) {
goog.testing.asserts.raiseException(comment, failureMessage);
}
};
/**
* @param {*} expected The expected value.
* @param {*} actual The actual value.
* @return {string} A failure message of the values don't match.
* @private
*/
goog.testing.asserts.getDefaultErrorMsg_ = function(expected, actual) {
'use strict';
var expectedDisplayString = _displayStringForValue(expected);
var actualDisplayString = _displayStringForValue(actual);
var shouldUseNewLines =
expectedDisplayString.length > OUTPUT_NEW_LINE_THRESHOLD ||
actualDisplayString.length > OUTPUT_NEW_LINE_THRESHOLD;
var msg = [
'Expected', expectedDisplayString, 'but was', actualDisplayString
].join(shouldUseNewLines ? '\n' : ' ');
if ((typeof expected == 'string') && (typeof actual == 'string')) {
// Try to find a human-readable difference.
var limit = Math.min(expected.length, actual.length);
var commonPrefix = 0;
while (commonPrefix < limit &&
expected.charAt(commonPrefix) == actual.charAt(commonPrefix)) {
commonPrefix++;
}
var commonSuffix = 0;
while (commonSuffix < limit &&
expected.charAt(expected.length - commonSuffix - 1) ==
actual.charAt(actual.length - commonSuffix - 1)) {
commonSuffix++;
}
if (commonPrefix + commonSuffix > limit) {
commonSuffix = 0;
}
if (commonPrefix > 2 || commonSuffix > 2) {
var printString = function(str) {
'use strict';
var startIndex = Math.max(0, commonPrefix - 2);
var endIndex = Math.min(str.length, str.length - (commonSuffix - 2));
return (startIndex > 0 ? '...' : '') +
str.substring(startIndex, endIndex) +
(endIndex < str.length ? '...' : '');
};
var expectedPrinted = printString(expected);
var expectedActual = printString(actual);
var shouldUseNewLinesInDiff =
expectedPrinted.length > OUTPUT_NEW_LINE_THRESHOLD ||
expectedActual.length > OUTPUT_NEW_LINE_THRESHOLD;
msg += '\nDifference was at position ' + commonPrefix + '. ' + [
'Expected', '[' + expectedPrinted + ']', 'vs. actual',
'[' + expectedActual + ']'
].join(shouldUseNewLinesInDiff ? '\n' : ' ');
}
}
return msg;
};
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assert = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var comment = commentArg(1, arguments);
var booleanValue = nonCommentArg(1, 1, arguments);
_assert(
comment, typeof booleanValue === 'boolean',
'Bad argument to assert(boolean): ' +
_displayStringForValue(booleanValue));
_assert(comment, booleanValue, 'Call to assert(boolean) with false');
};
/** @const */
var assert = goog.testing.asserts.assert;
/**
* Asserts that the function throws an error.
*
* @param {!(string|Function)} a The assertion comment or the function to call.
* @param {!Function=} opt_b The function to call (if the first argument of
* `assertThrows` was the comment).
* @return {!Error} The error thrown by the function. Beware that code may throw
* other types in strange scenarios.
* @throws {goog.testing.JsUnitException} If the assertion failed.
*/
goog.testing.asserts.assertThrows = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var func = nonCommentArg(1, 1, arguments);
var comment = commentArg(1, arguments);
_assert(
comment, typeof func == 'function',
'Argument passed to assertThrows is not a function');
try {
func();
} catch (e) {
goog.testing.asserts.removeOperaStacktrace_(e);
var testCase = _getCurrentTestCase();
if (e && e['isJsUnitException'] && testCase) {
goog.testing.asserts.raiseException(
comment,
'Function passed to assertThrows caught a JsUnitException (usually ' +
'from an assert or call to fail()). If this is expected, use ' +
'assertThrowsJsUnitException instead.');
}
return e;
}
goog.testing.asserts.raiseException(
comment, 'No exception thrown from function passed to assertThrows');
throw new Error('Should have thrown an error.'); // Make the compiler happy.
};
/** @const */
var assertThrows = goog.testing.asserts.assertThrows;
/**
* Removes a stacktrace from an Error object for Opera 10.0.
* @param {*} e
* @private
*/
goog.testing.asserts.removeOperaStacktrace_ = function(e) {
'use strict';
if (goog.isObject(e) && typeof e['stacktrace'] === 'string' &&
typeof e['message'] === 'string') {
var startIndex = e['message'].length - e['stacktrace'].length;
if (e['message'].indexOf(e['stacktrace'], startIndex) == startIndex) {
e['message'] = e['message'].substr(0, startIndex - 14);
}
}
};
/**
* Asserts that the function does not throw an error.
*
* @param {!(string|Function)} a The assertion comment or the function to call.
* @param {!Function=} opt_b The function to call (if the first argument of
* `assertNotThrows` was the comment).
* @return {*} The return value of the function.
* @throws {goog.testing.JsUnitException} If the assertion failed.
*/
goog.testing.asserts.assertNotThrows = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var comment = commentArg(1, arguments);
var func = nonCommentArg(1, 1, arguments);
_assert(
comment, typeof func == 'function',
'Argument passed to assertNotThrows is not a function');
try {
return func();
} catch (e) {
comment = comment ? (comment + '\n') : '';
comment += 'A non expected exception was thrown from function passed to ' +
'assertNotThrows';
// Some browsers don't have a stack trace so at least have the error
// description.
var stackTrace = e['stack'] || e['stacktrace'] || e.toString();
goog.testing.asserts.raiseException(comment, stackTrace);
}
};
/** @const */
var assertNotThrows = goog.testing.asserts.assertNotThrows;
/**
* Asserts that the given callback function results in a JsUnitException when
* called, and that the resulting failure message matches the given expected
* message.
* @param {function() : void} callback Function to be run expected to result
* in a JsUnitException (usually contains a call to an assert).
* @param {string=} opt_expectedMessage Failure message expected to be given
* with the exception.
* @return {!goog.testing.JsUnitException} The error thrown by the function.
* @throws {goog.testing.JsUnitException} If the function did not throw a
* JsUnitException.
*/
goog.testing.asserts.assertThrowsJsUnitException = function(
callback, opt_expectedMessage) {
'use strict';
try {
callback();
} catch (e) {
var testCase = _getCurrentTestCase();
if (testCase) {
testCase.invalidateAssertionException(e);
} else {
goog.global.console.error(
'Failed to remove expected exception: no test case is installed.');
}
if (!e.isJsUnitException) {
goog.testing.asserts.fail(
'Expected a JsUnitException, got \'' + e + '\' instead');
}
if (typeof opt_expectedMessage != 'undefined' &&
e.message != opt_expectedMessage) {
goog.testing.asserts.fail(
'Expected message [' + opt_expectedMessage + '] but got [' +
e.message + ']');
}
return e;
}
var msg = 'Expected a failure';
if (typeof opt_expectedMessage != 'undefined') {
msg += ': ' + opt_expectedMessage;
}
throw new goog.testing.JsUnitException(msg);
};
/** @const */
var assertThrowsJsUnitException =
goog.testing.asserts.assertThrowsJsUnitException;
/**
* Asserts that the IThenable rejects.
*
* This is useful for asserting that async functions throw, like an asynchronous
* assertThrows. Example:
*
* ```
* async function shouldThrow() { throw new Error('error!'); }
* async function testShouldThrow() {
* const error = await assertRejects(shouldThrow());
* assertEquals('error!', error.message);
* }
* ```
*
* @param {!(string|IThenable)} a The assertion comment or the IThenable.
* @param {!IThenable=} opt_b The IThenable (if the first argument of
* `assertRejects` was the comment).
* @return {!IThenable<*>} A child IThenable which resolves with the error that
* the passed in IThenable rejects with. This IThenable will reject if the
* passed in IThenable does not reject.
*/
goog.testing.asserts.assertRejects = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var thenable = /** @type {!IThenable<*>} */ (nonCommentArg(1, 1, arguments));
var comment = commentArg(1, arguments);
_assert(
comment, goog.isObject(thenable) && typeof thenable.then === 'function',
'Argument passed to assertRejects is not an IThenable');
return thenable.then(
function() {
'use strict';
goog.testing.asserts.raiseException(
comment, 'IThenable passed into assertRejects did not reject');
},
function(e) {
'use strict';
goog.testing.asserts.removeOperaStacktrace_(e);
return e;
});
};
/** @const */
var assertRejects = goog.testing.asserts.assertRejects;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertTrue = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var comment = commentArg(1, arguments);
var booleanValue = nonCommentArg(1, 1, arguments);
_assert(
comment, typeof booleanValue === 'boolean',
'Bad argument to assertTrue(boolean): ' +
_displayStringForValue(booleanValue));
_assert(comment, booleanValue, 'Call to assertTrue(boolean) with false');
};
/** @const */
var assertTrue = goog.testing.asserts.assertTrue;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertFalse = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var comment = commentArg(1, arguments);
var booleanValue = nonCommentArg(1, 1, arguments);
_assert(
comment, typeof booleanValue === 'boolean',
'Bad argument to assertFalse(boolean): ' +
_displayStringForValue(booleanValue));
_assert(comment, !booleanValue, 'Call to assertFalse(boolean) with true');
};
/** @const */
var assertFalse = goog.testing.asserts.assertFalse;
/**
* @param {*} a The expected value (2 args) or the debug message (3 args).
* @param {*} b The actual value (2 args) or the expected value (3 args).
* @param {*=} opt_c The actual value (3 args only).
*/
goog.testing.asserts.assertEquals = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var var1 = nonCommentArg(1, 2, arguments);
var var2 = nonCommentArg(2, 2, arguments);
_assert(
commentArg(2, arguments), var1 === var2,
goog.testing.asserts.getDefaultErrorMsg_(var1, var2));
};
/** @const */
var assertEquals = goog.testing.asserts.assertEquals;
/**
* @param {*} a The expected value (2 args) or the debug message (3 args).
* @param {*} b The actual value (2 args) or the expected value (3 args).
* @param {*=} opt_c The actual value (3 args only).
*/
goog.testing.asserts.assertNotEquals = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var var1 = nonCommentArg(1, 2, arguments);
var var2 = nonCommentArg(2, 2, arguments);
_assert(
commentArg(2, arguments), var1 !== var2,
'Expected not to be ' + _displayStringForValue(var2));
};
/** @const */
var assertNotEquals = goog.testing.asserts.assertNotEquals;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertNull = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var aVar = nonCommentArg(1, 1, arguments);
_assert(
commentArg(1, arguments), aVar === null,
goog.testing.asserts.getDefaultErrorMsg_(null, aVar));
};
/** @const */
var assertNull = goog.testing.asserts.assertNull;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertNotNull = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var aVar = nonCommentArg(1, 1, arguments);
_assert(
commentArg(1, arguments), aVar !== null,
'Expected not to be ' + _displayStringForValue(null));
};
/** @const */
var assertNotNull = goog.testing.asserts.assertNotNull;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertUndefined = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var aVar = nonCommentArg(1, 1, arguments);
_assert(
commentArg(1, arguments), aVar === JSUNIT_UNDEFINED_VALUE,
goog.testing.asserts.getDefaultErrorMsg_(JSUNIT_UNDEFINED_VALUE, aVar));
};
/** @const */
var assertUndefined = goog.testing.asserts.assertUndefined;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertNotUndefined = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var aVar = nonCommentArg(1, 1, arguments);
_assert(
commentArg(1, arguments), aVar !== JSUNIT_UNDEFINED_VALUE,
'Expected not to be ' + _displayStringForValue(JSUNIT_UNDEFINED_VALUE));
};
/** @const */
var assertNotUndefined = goog.testing.asserts.assertNotUndefined;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertNullOrUndefined = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var aVar = nonCommentArg(1, 1, arguments);
_assert(
commentArg(1, arguments), aVar == null,
'Expected ' + _displayStringForValue(null) + ' or ' +
_displayStringForValue(JSUNIT_UNDEFINED_VALUE) + ' but was ' +
_displayStringForValue(aVar));
};
/** @const */
var assertNullOrUndefined = goog.testing.asserts.assertNullOrUndefined;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertNotNullNorUndefined = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
goog.testing.asserts.assertNotNull.apply(null, arguments);
goog.testing.asserts.assertNotUndefined.apply(null, arguments);
};
/** @const */
var assertNotNullNorUndefined = goog.testing.asserts.assertNotNullNorUndefined;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertNonEmptyString = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var aVar = nonCommentArg(1, 1, arguments);
_assert(
commentArg(1, arguments), aVar !== JSUNIT_UNDEFINED_VALUE &&
aVar !== null && typeof aVar == 'string' && aVar !== '',
'Expected non-empty string but was ' + _displayStringForValue(aVar));
};
/** @const */
var assertNonEmptyString = goog.testing.asserts.assertNonEmptyString;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertNaN = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var aVar = nonCommentArg(1, 1, arguments);
_assert(
commentArg(1, arguments), aVar !== aVar,
'Expected NaN but was ' + _displayStringForValue(aVar));
};
/** @const */
var assertNaN = goog.testing.asserts.assertNaN;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertNotNaN = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var aVar = nonCommentArg(1, 1, arguments);
_assert(commentArg(1, arguments), !isNaN(aVar), 'Expected not NaN');
};
/** @const */
var assertNotNaN = goog.testing.asserts.assertNotNaN;
/**
* The return value of the equality predicate passed to findDifferences below,
* in cases where the predicate can't test the input variables for equality.
* @type {?string}
*/
goog.testing.asserts.EQUALITY_PREDICATE_CANT_PROCESS = null;
/**
* The return value of the equality predicate passed to findDifferences below,
* in cases where the input vriables are equal.
* @type {?string}
*/
goog.testing.asserts.EQUALITY_PREDICATE_VARS_ARE_EQUAL = '';
/**
* @const {!Object<string, boolean>}
*/
goog.testing.asserts.ARRAY_TYPES = {
'Array': true,
'Float32Array': true,
'Float64Array': true,
'Int8Array': true,
'Int16Array': true,
'Int32Array': true,
'Uint8Array': true,
'Uint8ClampedArray': true,
'Uint16Array': true,
'Uint32Array': true,
'BigInt64Array': true,
'BigUint64Array': true
};
/**
* Determines if two items of any type match, and formulates an error message
* if not.
* @param {*} expected Expected argument to match.
* @param {*} actual Argument as a result of performing the test.
* @param {(function(string, *, *): ?string)=} opt_equalityPredicate An optional
* function that can be used to check equality of variables. It accepts 3
* arguments: type-of-variables, var1, var2 (in that order) and returns an
* error message if the variables are not equal,
* goog.testing.asserts.EQUALITY_PREDICATE_VARS_ARE_EQUAL if the variables
* are equal, or
* goog.testing.asserts.EQUALITY_PREDICATE_CANT_PROCESS if the predicate
* couldn't check the input variables. The function will be called only if
* the types of var1 and var2 are identical.
* @return {?string} Null on success, error message on failure.
*/
goog.testing.asserts.findDifferences = function(
expected, actual, opt_equalityPredicate) {
'use strict';
var failures = [];
// True if there a generic error at the root (with no path). If so, we should
// fail, but not add to the failures array (because it will be included at the
// top anyway).
var rootFailed = false;
var seen1 = [];
var seen2 = [];
// To avoid infinite recursion when the two parameters are self-referential
// along the same path of properties, keep track of the object pairs already
// seen in this call subtree, and abort when a cycle is detected.
function innerAssertWithCycleCheck(var1, var2, path) {
// This is used for testing, so we can afford to be slow (but more
// accurate). So we just check whether var1 is in seen1. If we
// found var1 in index i, we simply need to check whether var2 is
// in seen2[i]. If it is, we do not recurse to check var1/var2. If
// it isn't, we know that the structures of the two objects must be
// different.
//
// This is based on the fact that values at index i in seen1 and
// seen2 will be checked for equality eventually (when
// innerAssertImplementation(seen1[i], seen2[i], path) finishes).
for (var i = 0; i < seen1.length; ++i) {
var match1 = seen1[i] === var1;
var match2 = seen2[i] === var2;
if (match1 || match2) {
if (!match1 || !match2) {
// Asymmetric cycles, so the objects have different structure.
failures.push('Asymmetric cycle detected at ' + path);
}
return;
}
}
seen1.push(var1);
seen2.push(var2);
innerAssertImplementation(var1, var2, path);
seen1.pop();
seen2.pop();
}
const equalityPredicate =
opt_equalityPredicate || function(type, var1, var2) {
'use strict';
const typedPredicate = EQUALITY_PREDICATES[type];
if (!typedPredicate) {
return goog.testing.asserts.EQUALITY_PREDICATE_CANT_PROCESS;
}
const equal = typedPredicate(var1, var2);
return equal ? goog.testing.asserts.EQUALITY_PREDICATE_VARS_ARE_EQUAL :
goog.testing.asserts.getDefaultErrorMsg_(var1, var2);
};
/**
* @param {*} var1 An item in the expected object.
* @param {*} var2 The corresponding item in the actual object.
* @param {string} path Their path in the objects.
* @suppress {missingProperties} The map_ property is unknown to the compiler
* unless goog.structs.Map is loaded.
*/
function innerAssertImplementation(var1, var2, path) {
if (var1 === var2) {
return;
}
var typeOfVar1 = _trueTypeOf(var1);
var typeOfVar2 = _trueTypeOf(var2);
if (typeOfVar1 === typeOfVar2) {
const isArrayBuffer = typeOfVar1 === 'ArrayBuffer';
if (isArrayBuffer) {
// Since ArrayBuffer instances can't themselves be iterated through,
// compare 1-byte-per-element views of them.
var1 = new Uint8Array(/** @type {!ArrayBuffer} */ (var1));
var2 = new Uint8Array(/** @type {!ArrayBuffer} */ (var2));
}
const isArray =
isArrayBuffer || goog.testing.asserts.ARRAY_TYPES[typeOfVar1];
var errorMessage = equalityPredicate(typeOfVar1, var1, var2);
if (errorMessage !=
goog.testing.asserts.EQUALITY_PREDICATE_CANT_PROCESS) {
if (errorMessage !=
goog.testing.asserts.EQUALITY_PREDICATE_VARS_ARE_EQUAL) {
if (path) {
failures.push(path + ': ' + errorMessage);
} else {
rootFailed = true;
}
}
} else if (isArray && var1.length != var2.length) {
failures.push(
(path ? path + ': ' : '') + 'Expected ' + var1.length +
'-element array ' +
'but got a ' + var2.length + '-element array');
} else if (typeOfVar1 == 'String') {
// If the comparer cannot process strings (eg, roughlyEquals).
if (var1 != var2) {
if (path) {
failures.push(
path + ': ' +
goog.testing.asserts.getDefaultErrorMsg_(var1, var2));
} else {
rootFailed = true;
}
}
} else {
var childPath = path + (isArray ? '[%s]' : (path ? '.%s' : '%s'));
// These type checks do not use _trueTypeOf because that does not work
// for polyfilled Map/Set. Note that these checks may potentially fail
// if var1 comes from a different window.
if ((typeof Map != 'undefined' && var1 instanceof Map) ||
(typeof Set != 'undefined' && var1 instanceof Set)) {
var1.forEach(function(value, key) {
'use strict';
if (var2.has(key)) {
// For a map, the values must be compared, but with Set, checking
// that the second set contains the first set's "keys" is
// sufficient.
if (var2.get) {
innerAssertWithCycleCheck(
// NOTE: replace will call functions, so stringify eagerly.
value, var2.get(key), childPath.replace('%s', String(key)));
}
} else {
failures.push(
key + ' not present in actual ' + (path || typeOfVar2));
}
});
var2.forEach(function(value, key) {
'use strict';
if (!var1.has(key)) {
failures.push(
key + ' not present in expected ' + (path || typeOfVar1));
}
});
} else if (!var1['__iterator__']) {
// if an object has an __iterator__ property, we have no way of
// actually inspecting its raw properties, and JS 1.7 doesn't
// overload [] to make it possible for someone to generically
// use what the iterator returns to compare the object-managed
// properties. This gets us into deep poo with things like
// goog.structs.Map, at least on systems that support iteration.
for (var prop in var1) {
if (isArray && goog.testing.asserts.isArrayIndexProp_(prop)) {
// Skip array indices for now. We'll handle them later.
continue;
}
if (prop in var2) {
innerAssertWithCycleCheck(
var1[prop], var2[prop], childPath.replace('%s', prop));
} else {
failures.push(
'property ' + prop + ' not present in actual ' +
(path || typeOfVar2));
}
}
// make sure there aren't properties in var2 that are missing
// from var1. if there are, then by definition they don't
// match.
for (var prop in var2) {
if (isArray && goog.testing.asserts.isArrayIndexProp_(prop)) {
// Skip array indices for now. We'll handle them later.
continue;
}
if (!(prop in var1)) {
failures.push(
'property ' + prop + ' not present in expected ' +
(path || typeOfVar1));
}
}
// Handle array indices by iterating from 0 to arr.length.
//
// Although all browsers allow holes in arrays, browsers
// are inconsistent in what they consider a hole. For example,
// "[0,undefined,2]" has a hole on IE but not on Firefox.
//
// Because our style guide bans for...in iteration over arrays,
// we assume that most users don't care about holes in arrays,
// and that it is ok to say that a hole is equivalent to a slot
// populated with 'undefined'.
if (isArray) {
for (prop = 0; prop < var1.length; prop++) {
innerAssertWithCycleCheck(
var1[prop], var2[prop],
childPath.replace('%s', String(prop)));
}
}
} else {
// special-case for closure objects that have iterators
if (typeof var1.equals === 'function') {
// use the object's own equals function, assuming it accepts an
// object and returns a boolean
if (!var1.equals(var2)) {
failures.push(
'equals() returned false for ' + (path || typeOfVar1));
}
} else if (var1.map_) {
// assume goog.structs.Map or goog.structs.Set, where comparing
// their private map_ field is sufficient
innerAssertWithCycleCheck(
var1.map_, var2.map_, childPath.replace('%s', 'map_'));
} else {
// else die, so user knows we can't do anything
failures.push(
'unable to check ' + (path || typeOfVar1) +
' for equality: it has an iterator we do not ' +
'know how to handle. please add an equals method');
}
}
}
} else if (path) {
failures.push(
path + ': ' + goog.testing.asserts.getDefaultErrorMsg_(var1, var2));
} else {
rootFailed = true;
}
}
innerAssertWithCycleCheck(expected, actual, '');
if (rootFailed) {
return goog.testing.asserts.getDefaultErrorMsg_(expected, actual);
}
return failures.length == 0 ? null : goog.testing.asserts.getDefaultErrorMsg_(
expected, actual) +
'\n ' + failures.join('\n ');
};
/**
* Notes:
* Object equality has some nasty browser quirks, and this implementation is
* not 100% correct. For example,
*
* <code>
* var a = [0, 1, 2];
* var b = [0, 1, 2];
* delete a[1];
* b[1] = undefined;
* assertObjectEquals(a, b); // should fail, but currently passes
* </code>
*
* See asserts_test.html for more interesting edge cases.
*
* The first comparison object provided is the expected value, the second is
* the actual.
*
* @param {*} a Assertion message or comparison object.
* @param {*} b Comparison object.
* @param {*=} opt_c Comparison object, if an assertion message was provided.
*/
goog.testing.asserts.assertObjectEquals = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var v1 = nonCommentArg(1, 2, arguments);
var v2 = nonCommentArg(2, 2, arguments);
var failureMessage = commentArg(2, arguments) ? commentArg(2, arguments) : '';
var differences = goog.testing.asserts.findDifferences(v1, v2);
_assert(failureMessage, !differences, differences);
};
/** @const */
var assertObjectEquals = goog.testing.asserts.assertObjectEquals;
/**
* Similar to assertObjectEquals above, but accepts a tolerance margin.
*
* @param {*} a Assertion message or comparison object.
* @param {*} b Comparison object.
* @param {*} c Comparison object or tolerance.
* @param {*=} opt_d Tolerance, if an assertion message was provided.
*/
goog.testing.asserts.assertObjectRoughlyEquals = function(a, b, c, opt_d) {
'use strict';
_validateArguments(3, arguments);
var v1 = nonCommentArg(1, 3, arguments);
var v2 = nonCommentArg(2, 3, arguments);
var tolerance = nonCommentArg(3, 3, arguments);
var failureMessage = commentArg(3, arguments) ? commentArg(3, arguments) : '';
var equalityPredicate = function(type, var1, var2) {
'use strict';
var typedPredicate =
goog.testing.asserts.primitiveRoughEqualityPredicates_[type];
if (!typedPredicate) {
return goog.testing.asserts.EQUALITY_PREDICATE_CANT_PROCESS;
}
var equal = typedPredicate(var1, var2, tolerance);
return equal ? goog.testing.asserts.EQUALITY_PREDICATE_VARS_ARE_EQUAL :
goog.testing.asserts.getDefaultErrorMsg_(var1, var2) +
' which was more than ' + tolerance + ' away';
};
var differences =
goog.testing.asserts.findDifferences(v1, v2, equalityPredicate);
_assert(failureMessage, !differences, differences);
};
/** @const */
var assertObjectRoughlyEquals = goog.testing.asserts.assertObjectRoughlyEquals;
/**
* Compares two arbitrary objects for non-equalness.
*
* All the same caveats as for assertObjectEquals apply here:
* Undefined values may be confused for missing values, or vice versa.
*
* @param {*} a Assertion message or comparison object.
* @param {*} b Comparison object.
* @param {*=} opt_c Comparison object, if an assertion message was provided.
*/
goog.testing.asserts.assertObjectNotEquals = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var v1 = nonCommentArg(1, 2, arguments);
var v2 = nonCommentArg(2, 2, arguments);
var failureMessage = commentArg(2, arguments) ? commentArg(2, arguments) : '';
var differences = goog.testing.asserts.findDifferences(v1, v2);
_assert(failureMessage, differences, 'Objects should not be equal');
};
/** @const */
var assertObjectNotEquals = goog.testing.asserts.assertObjectNotEquals;
/**
* Compares two arrays ignoring negative indexes and extra properties on the
* array objects. Use case: Internet Explorer adds the index, lastIndex and
* input enumerable fields to the result of string.match(/regexp/g), which makes
* assertObjectEquals fail.
* @param {*} a The expected array (2 args) or the debug message (3 args).
* @param {*} b The actual array (2 args) or the expected array (3 args).
* @param {*=} opt_c The actual array (3 args only).
*/
goog.testing.asserts.assertArrayEquals = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var v1 = nonCommentArg(1, 2, arguments);
var v2 = nonCommentArg(2, 2, arguments);
var failureMessage = commentArg(2, arguments) ? commentArg(2, arguments) : '';
var typeOfVar1 = _trueTypeOf(v1);
_assert(
failureMessage, typeOfVar1 == 'Array',
'Expected an array for assertArrayEquals but found a ' + typeOfVar1);
var typeOfVar2 = _trueTypeOf(v2);
_assert(
failureMessage, typeOfVar2 == 'Array',
'Expected an array for assertArrayEquals but found a ' + typeOfVar2);
goog.testing.asserts.assertObjectEquals(
failureMessage, Array.prototype.concat.call(v1),
Array.prototype.concat.call(v2));
};
/** @const */
var assertArrayEquals = goog.testing.asserts.assertArrayEquals;
/**
* Compares two objects that can be accessed like an array and assert that
* each element is equal.
* @param {string|Object} a Failure message (3 arguments)
* or object #1 (2 arguments).
* @param {Object} b Object #2 (2 arguments) or object #1 (3 arguments).
* @param {Object=} opt_c Object #2 (3 arguments).
*/
goog.testing.asserts.assertElementsEquals = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var v1 = nonCommentArg(1, 2, arguments);
var v2 = nonCommentArg(2, 2, arguments);
var failureMessage = commentArg(2, arguments) ? commentArg(2, arguments) : '';
if (!v1) {
goog.testing.asserts.assert(failureMessage, !v2);
} else {
goog.testing.asserts.assertEquals(
'length mismatch: ' + failureMessage, v1.length, v2.length);
for (var i = 0; i < v1.length; ++i) {
goog.testing.asserts.assertEquals(
'mismatch at index ' + i + ': ' + failureMessage, v1[i], v2[i]);
}
}
};
/** @const */
var assertElementsEquals = goog.testing.asserts.assertElementsEquals;
/**
* Compares two objects that can be accessed like an array and assert that
* each element is roughly equal.
* @param {string|Object} a Failure message (4 arguments)
* or object #1 (3 arguments).
* @param {Object} b Object #1 (4 arguments) or object #2 (3 arguments).
* @param {Object|number} c Object #2 (4 arguments) or tolerance (3 arguments).
* @param {number=} opt_d tolerance (4 arguments).
*/
goog.testing.asserts.assertElementsRoughlyEqual = function(a, b, c, opt_d) {
'use strict';
_validateArguments(3, arguments);
var v1 = nonCommentArg(1, 3, arguments);
var v2 = nonCommentArg(2, 3, arguments);
var tolerance = nonCommentArg(3, 3, arguments);
var failureMessage = commentArg(3, arguments) ? commentArg(3, arguments) : '';
if (!v1) {
goog.testing.asserts.assert(failureMessage, !v2);
} else {
goog.testing.asserts.assertEquals(
'length mismatch: ' + failureMessage, v1.length, v2.length);
for (var i = 0; i < v1.length; ++i) {
goog.testing.asserts.assertRoughlyEquals(
failureMessage, v1[i], v2[i], tolerance);
}
}
};
/** @const */
var assertElementsRoughlyEqual =
goog.testing.asserts.assertElementsRoughlyEqual;
/**
* Compares elements of two array-like or iterable objects using strict equality
* without taking their order into account.
* @param {string|!IArrayLike|!Iterable} a Assertion message or the
* expected elements.
* @param {!IArrayLike|!Iterable} b Expected elements or the actual
* elements.
* @param {!IArrayLike|!Iterable=} opt_c Actual elements.
*/
goog.testing.asserts.assertSameElements = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var expected = nonCommentArg(1, 2, arguments);
var actual = nonCommentArg(2, 2, arguments);
var message = commentArg(2, arguments);
goog.testing.asserts.assertTrue(
'Value of \'expected\' should be array-like or iterable',
goog.testing.asserts.isArrayLikeOrIterable_(expected));
goog.testing.asserts.assertTrue(
'Value of \'actual\' should be array-like or iterable',
goog.testing.asserts.isArrayLikeOrIterable_(actual));
// Clones expected and actual and converts them to real arrays.
expected = goog.testing.asserts.toArray_(expected);
actual = goog.testing.asserts.toArray_(actual);
// TODO(user): It would be great to show only the difference
// between the expected and actual elements.
_assert(
message, expected.length == actual.length, 'Expected ' + expected.length +
' elements: [' + expected + '], ' +
'got ' + actual.length + ' elements: [' + actual + ']');
var toFind = goog.testing.asserts.toArray_(expected);
for (var i = 0; i < actual.length; i++) {
var index = goog.testing.asserts.indexOf_(toFind, actual[i]);
_assert(
message, index != -1,
'Expected [' + expected + '], got [' + actual + ']');
toFind.splice(index, 1);
}
};
/** @const */
var assertSameElements = goog.testing.asserts.assertSameElements;
/**
* @param {*} obj Object to test.
* @return {boolean} Whether given object is array-like or iterable.
* @private
*/
goog.testing.asserts.isArrayLikeOrIterable_ = function(obj) {
'use strict';
return goog.isArrayLike(obj) || goog.testing.asserts.isIterable_(obj);
};
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertEvaluatesToTrue = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var value = nonCommentArg(1, 1, arguments);
if (!value) {
_assert(commentArg(1, arguments), false, 'Expected to evaluate to true');
}
};
/** @const */
var assertEvaluatesToTrue = goog.testing.asserts.assertEvaluatesToTrue;
/**
* @param {*} a The value to assert (1 arg) or debug message (2 args).
* @param {*=} opt_b The value to assert (2 args only).
*/
goog.testing.asserts.assertEvaluatesToFalse = function(a, opt_b) {
'use strict';
_validateArguments(1, arguments);
var value = nonCommentArg(1, 1, arguments);
if (value) {
_assert(commentArg(1, arguments), false, 'Expected to evaluate to false');
}
};
/** @const */
var assertEvaluatesToFalse = goog.testing.asserts.assertEvaluatesToFalse;
/**
* Compares two HTML snippets.
*
* Take extra care if attributes are involved. `assertHTMLEquals`'s
* implementation isn't prepared for complex cases. For example, the following
* comparisons erroneously fail:
* <pre>
* assertHTMLEquals('<a href="x" target="y">', '<a target="y" href="x">');
* assertHTMLEquals('<div class="a b">', '<div class="b a">');
* assertHTMLEquals('<input disabled>', '<input disabled="disabled">');
* </pre>
*
* When in doubt, use `goog.testing.dom.assertHtmlMatches`.
*
* @param {*} a The expected value (2 args) or the debug message (3 args).
* @param {*} b The actual value (2 args) or the expected value (3 args).
* @param {*=} opt_c The actual value (3 args only).
*/
goog.testing.asserts.assertHTMLEquals = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var var1 = nonCommentArg(1, 2, arguments);
var var2 = nonCommentArg(2, 2, arguments);
var var1Standardized = standardizeHTML(var1);
var var2Standardized = standardizeHTML(var2);
_assert(
commentArg(2, arguments), var1Standardized === var2Standardized,
goog.testing.asserts.getDefaultErrorMsg_(
var1Standardized, var2Standardized));
};
/** @const */
var assertHTMLEquals = goog.testing.asserts.assertHTMLEquals;
/**
* Compares two CSS property values to make sure that they represent the same
* things. This will normalize values in the browser. For example, in Firefox,
* this assertion will consider "rgb(0, 0, 255)" and "#0000ff" to be identical
* values for the "color" property. This function won't normalize everything --
* for example, in most browsers, "blue" will not match "#0000ff". It is
* intended only to compensate for unexpected normalizations performed by
* the browser that should also affect your expected value.
* @param {string} a Assertion message, or the CSS property name.
* @param {string} b CSS property name, or the expected value.
* @param {string} c The expected value, or the actual value.
* @param {string=} opt_d The actual value.
*/
goog.testing.asserts.assertCSSValueEquals = function(a, b, c, opt_d) {
'use strict';
_validateArguments(3, arguments);
var propertyName = nonCommentArg(1, 3, arguments);
var expectedValue = nonCommentArg(2, 3, arguments);
var actualValue = nonCommentArg(3, 3, arguments);
var expectedValueStandardized =
standardizeCSSValue(propertyName, expectedValue);
var actualValueStandardized = standardizeCSSValue(propertyName, actualValue);
_assert(
commentArg(3, arguments),
expectedValueStandardized == actualValueStandardized,
goog.testing.asserts.getDefaultErrorMsg_(
expectedValueStandardized, actualValueStandardized));
};
/** @const */
var assertCSSValueEquals = goog.testing.asserts.assertCSSValueEquals;
/**
* @param {*} a The expected value (2 args) or the debug message (3 args).
* @param {*} b The actual value (2 args) or the expected value (3 args).
* @param {*=} opt_c The actual value (3 args only).
*/
goog.testing.asserts.assertHashEquals = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var var1 = nonCommentArg(1, 2, arguments);
var var2 = nonCommentArg(2, 2, arguments);
var message = commentArg(2, arguments);
for (var key in var1) {
_assert(
message, key in var2,
'Expected hash had key ' + key + ' that was not found');
_assert(
message, var1[key] == var2[key], 'Value for key ' + key +
' mismatch - expected = ' + var1[key] + ', actual = ' + var2[key]);
}
for (var key in var2) {
_assert(
message, key in var1,
'Actual hash had key ' + key + ' that was not expected');
}
};
/** @const */
var assertHashEquals = goog.testing.asserts.assertHashEquals;
/**
* @param {*} a The expected value (3 args) or the debug message (4 args).
* @param {*} b The actual value (3 args) or the expected value (4 args).
* @param {*} c The tolerance (3 args) or the actual value (4 args).
* @param {*=} opt_d The tolerance (4 args only).
*/
goog.testing.asserts.assertRoughlyEquals = function(a, b, c, opt_d) {
'use strict';
_validateArguments(3, arguments);
var expected = nonCommentArg(1, 3, arguments);
var actual = nonCommentArg(2, 3, arguments);
var tolerance = nonCommentArg(3, 3, arguments);
_assert(
commentArg(3, arguments),
goog.testing.asserts.numberRoughEqualityPredicate_(
expected, actual, tolerance),
'Expected ' + expected + ', but got ' + actual + ' which was more than ' +
tolerance + ' away');
};
/** @const */
var assertRoughlyEquals = goog.testing.asserts.assertRoughlyEquals;
/**
* Checks if the test value is included in the given container. The container
* can be a string (where "included" means a substring), an array or any
* `IArrayLike` (where "included" means a member), or any type implementing
* `indexOf` with similar semantics (returning -1 for not included).
*
* @param {*} a Failure message (3 arguments) or the test value
* (2 arguments).
* @param {*} b The test value (3 arguments) or the container
* (2 arguments).
* @param {*=} opt_c The container.
*/
goog.testing.asserts.assertContains = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var contained = nonCommentArg(1, 2, arguments);
var container = nonCommentArg(2, 2, arguments);
_assert(
commentArg(2, arguments),
goog.testing.asserts.contains_(container, contained),
'Expected \'' + container + '\' to contain \'' + contained + '\'');
};
/** @const */
var assertContains = goog.testing.asserts.assertContains;
/**
* Checks if the test value is not included in the given container. The
* container can be a string (where "included" means a substring), an array or
* any `IArrayLike` (where "included" means a member), or any type implementing
* `indexOf` with similar semantics (returning -1 for not included).
* @param {*} a Failure message (3 arguments) or the contained element
* (2 arguments).
* @param {*} b The contained element (3 arguments) or the container
* (2 arguments).
* @param {*=} opt_c The container.
*/
goog.testing.asserts.assertNotContains = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var contained = nonCommentArg(1, 2, arguments);
var container = nonCommentArg(2, 2, arguments);
_assert(
commentArg(2, arguments),
!goog.testing.asserts.contains_(container, contained),
'Expected \'' + container + '\' not to contain \'' + contained + '\'');
};
/** @const */
var assertNotContains = goog.testing.asserts.assertNotContains;
/**
* Checks if the given string matches the given regular expression.
* @param {*} a Failure message (3 arguments) or the expected regular
* expression as a string or RegExp (2 arguments).
* @param {*} b The regular expression (3 arguments) or the string to test
* (2 arguments).
* @param {*=} opt_c The string to test.
*/
goog.testing.asserts.assertRegExp = function(a, b, opt_c) {
'use strict';
_validateArguments(2, arguments);
var regexp = nonCommentArg(1, 2, arguments);
var string = nonCommentArg(2, 2, arguments);
if (typeof(regexp) == 'string') {
regexp = new RegExp(regexp);
}
_assert(
commentArg(2, arguments), regexp.test(string),
'Expected \'' + string + '\' to match RegExp ' + regexp.toString());
};
/** @const */
var assertRegExp = goog.testing.asserts.assertRegExp;
/**
* Converts an array-like or iterable object to an array (clones it if it's
* already an array).
* @param {!Iterable|!IArrayLike} obj The collection object.
* @return {!Array<?>} Copy of the collection as array.
* @private
*/
goog.testing.asserts.toArray_ = function(obj) {
'use strict';
var ret = [];
if (goog.testing.asserts.isIterable_(obj)) {
var iterator =
goog.testing.asserts.getIterator_(/** @type {!Iterable} */ (obj));
// Cannot use for..of syntax here as ES6 syntax is not available in Closure.
// See b/117231092
while (true) {
var result = iterator.next();
if (result.done) {
return ret;
}
ret.push(result.value);
}
}
for (var i = 0; i < obj.length; i++) {
ret[i] = obj[i];
}
return ret;
};
// TODO(nnaze): Consider moving isIterable_ and getIterator_ functionality
// into goog.iter.es6. See discussion in cl/217356297.
/**
* @param {*} obj
* @return {boolean} Whether the object is iterable (JS iterator protocol).
* @private
*/
goog.testing.asserts.isIterable_ = function(obj) {
'use strict';
return !!(
typeof Symbol !== 'undefined' && Symbol.iterator && obj[Symbol.iterator]);
};
/**
* @param {!Iterable} iterable
* @return {!Iterator} An iterator for obj.
* @throws {!goog.testing.JsUnitException} If the given object is not iterable.
* @private
*/
goog.testing.asserts.getIterator_ = function(iterable) {
'use strict';
if (!goog.testing.asserts.isIterable_(iterable)) {
goog.testing.asserts.raiseException('parameter iterable is not iterable');
}
return iterable[Symbol.iterator]();
};
/**
* Finds the position of the first occurrence of an element in a container.
* @param {IArrayLike<?>|{indexOf: function(*): number}} container
* The array to find the element in.
* @param {*} contained Element to find.
* @return {number} Index of the first occurrence or -1 if not found.
* @private
*/
goog.testing.asserts.indexOf_ = function(container, contained) {
'use strict';
if (typeof container.indexOf == 'function') {
return container.indexOf(contained);
} else {
// IE6/7 do not have indexOf so do a search.
for (var i = 0; i < container.length; i++) {
if (container[i] === contained) {
return i;
}
}
return -1;
}
};
/**
* Tells whether the array contains the given element.
* @param {IArrayLike<?>|{indexOf: function(*): number}} container The array to
* find the element in.
* @param {*} contained Element to find.
* @return {boolean} Whether the element is in the array.
* @private
*/
goog.testing.asserts.contains_ = function(container, contained) {
'use strict';
// TODO(user): Can we check for container.contains as well?
// That would give us support for most goog.structs (though weird results
// with anything else with a contains method, like goog.math.Range). Falling
// back with container.some would catch all iterables, too.
return goog.testing.asserts.indexOf_(container, contained) != -1;
};
var standardizeHTML = function(html) {
'use strict';
var translator = document.createElement('div');
goog.dom.safe.setInnerHtml(
translator,
goog.html.uncheckedconversions
.safeHtmlFromStringKnownToSatisfyTypeContract(
goog.string.Const.from('HTML is never attached to DOM'), html));
// Trim whitespace from result (without relying on goog.string)
return translator.innerHTML.replace(/^\s+|\s+$/g, '');
};
/**
* Standardizes a CSS value for a given property by applying it to an element
* and then reading it back.
* @param {string} propertyName CSS property name.
* @param {string} value CSS value.
* @return {string} Normalized CSS value.
*/
var standardizeCSSValue = function(propertyName, value) {
'use strict';
var styleDeclaration = document.createElement('div').style;
styleDeclaration[propertyName] = value;
return styleDeclaration[propertyName];
};
/**
* Raises a JsUnit exception with the given comment. If the exception is
* unexpectedly caught during a unit test, it will be rethrown so that it is
* seen by the test framework.
* @param {string} comment A summary for the exception.
* @param {string=} opt_message A description of the exception.
*/
goog.testing.asserts.raiseException = function(comment, opt_message) {
'use strict';
var e = new goog.testing.JsUnitException(comment, opt_message);
var testCase = _getCurrentTestCase();
if (testCase) {
testCase.raiseAssertionException(e);
} else {
goog.global.console.error(
'Failed to save thrown exception: no test case is installed.');
throw e;
}
};
/**
* Helper function for assertObjectEquals.
* @param {string} prop A property name.
* @return {boolean} If the property name is an array index.
* @private
*/
goog.testing.asserts.isArrayIndexProp_ = function(prop) {
'use strict';
return prop === '0' || /^[1-9][0-9]*$/.test(prop);
};
/** @define {boolean} */
goog.EXPORT_ASSERTIONS = goog.define('goog.EXPORT_ASSERTIONS', true);
/*
* These symbols are both exported in the global namespace (for legacy
* reasons) and as part of the goog.testing.asserts namespace. Although they
* can be used globally in tests, these symbols are allowed to be imported for
* cleaner typing.
*/
if (goog.EXPORT_ASSERTIONS) {
goog.exportSymbol('fail', fail);
goog.exportSymbol('assert', assert);
goog.exportSymbol('assertThrows', assertThrows);
goog.exportSymbol('assertNotThrows', assertNotThrows);
goog.exportSymbol('assertThrowsJsUnitException', assertThrowsJsUnitException);
goog.exportSymbol('assertRejects', assertRejects);
goog.exportSymbol('assertTrue', assertTrue);
goog.exportSymbol('assertFalse', assertFalse);
goog.exportSymbol('assertEquals', assertEquals);
goog.exportSymbol('assertNotEquals', assertNotEquals);
goog.exportSymbol('assertNull', assertNull);
goog.exportSymbol('assertNotNull', assertNotNull);
goog.exportSymbol('assertUndefined', assertUndefined);
goog.exportSymbol('assertNotUndefined', assertNotUndefined);
goog.exportSymbol('assertNullOrUndefined', assertNullOrUndefined);
goog.exportSymbol('assertNotNullNorUndefined', assertNotNullNorUndefined);
goog.exportSymbol('assertNonEmptyString', assertNonEmptyString);
goog.exportSymbol('assertNaN', assertNaN);
goog.exportSymbol('assertNotNaN', assertNotNaN);
goog.exportSymbol('assertObjectEquals', assertObjectEquals);
goog.exportSymbol('assertObjectRoughlyEquals', assertObjectRoughlyEquals);
goog.exportSymbol('assertObjectNotEquals', assertObjectNotEquals);
goog.exportSymbol('assertArrayEquals', assertArrayEquals);
goog.exportSymbol('assertElementsEquals', assertElementsEquals);
goog.exportSymbol('assertElementsRoughlyEqual', assertElementsRoughlyEqual);
goog.exportSymbol('assertSameElements', assertSameElements);
goog.exportSymbol('assertEvaluatesToTrue', assertEvaluatesToTrue);
goog.exportSymbol('assertEvaluatesToFalse', assertEvaluatesToFalse);
goog.exportSymbol('assertHTMLEquals', assertHTMLEquals);
goog.exportSymbol('assertHashEquals', assertHashEquals);
goog.exportSymbol('assertRoughlyEquals', assertRoughlyEquals);
goog.exportSymbol('assertContains', assertContains);
goog.exportSymbol('assertNotContains', assertNotContains);
goog.exportSymbol('assertRegExp', assertRegExp);
}
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