mirror of https://github.com/tc39/test262.git
89 lines
2.1 KiB
JavaScript
89 lines
2.1 KiB
JavaScript
// Copyright (C) 2017 Ecma International. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: |
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Collection of assertion functions used throughout test262
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---*/
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function assert(mustBeTrue, message) {
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if (mustBeTrue === true) {
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return;
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}
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if (message === undefined) {
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message = 'Expected true but got ' + String(mustBeTrue);
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}
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$ERROR(message);
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}
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assert._isSameValue = function (a, b) {
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if (a === b) {
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// Handle +/-0 vs. -/+0
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return a !== 0 || 1 / a === 1 / b;
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}
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// Handle NaN vs. NaN
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return a !== a && b !== b;
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};
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assert.sameValue = function (actual, expected, message) {
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if (assert._isSameValue(actual, expected)) {
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return;
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}
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if (message === undefined) {
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message = '';
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} else {
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message += ' ';
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}
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message += 'Expected SameValue(«' + String(actual) + '», «' + String(expected) + '») to be true';
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$ERROR(message);
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};
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assert.notSameValue = function (actual, unexpected, message) {
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if (!assert._isSameValue(actual, unexpected)) {
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return;
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}
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if (message === undefined) {
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message = '';
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} else {
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message += ' ';
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}
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message += 'Expected SameValue(«' + String(actual) + '», «' + String(unexpected) + '») to be false';
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$ERROR(message);
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};
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assert.throws = function (expectedErrorConstructor, func, message) {
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if (typeof func !== "function") {
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$ERROR('assert.throws requires two arguments: the error constructor ' +
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'and a function to run');
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return;
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}
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if (message === undefined) {
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message = '';
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} else {
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message += ' ';
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}
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try {
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func();
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} catch (thrown) {
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if (typeof thrown !== 'object' || thrown === null) {
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message += 'Thrown value was not an object!';
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$ERROR(message);
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} else if (thrown.constructor !== expectedErrorConstructor) {
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message += 'Expected a ' + expectedErrorConstructor.name + ' but got a ' + thrown.constructor.name;
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$ERROR(message);
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}
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return;
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}
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message += 'Expected a ' + expectedErrorConstructor.name + ' to be thrown but no exception was thrown at all';
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$ERROR(message);
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};
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