Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1 | // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | // Flags: --harmony-async-await --allow-natives-syntax |
| 6 | |
| 7 | function assertEqualsAsync(expected, run, msg) { |
| 8 | var actual; |
| 9 | var hadValue = false; |
| 10 | var hadError = false; |
| 11 | var promise = run(); |
| 12 | |
| 13 | if (typeof promise !== "object" || typeof promise.then !== "function") { |
| 14 | throw new MjsUnitAssertionError( |
| 15 | "Expected " + run.toString() + |
| 16 | " to return a Promise, but it returned " + PrettyPrint(promise)); |
| 17 | } |
| 18 | |
| 19 | promise.then(function(value) { hadValue = true; actual = value; }, |
| 20 | function(error) { hadError = true; actual = error; }); |
| 21 | |
| 22 | assertFalse(hadValue || hadError); |
| 23 | |
| 24 | %RunMicrotasks(); |
| 25 | |
| 26 | if (hadError) throw actual; |
| 27 | |
| 28 | assertTrue( |
| 29 | hadValue, "Expected '" + run.toString() + "' to produce a value"); |
| 30 | |
| 31 | assertEquals(expected, actual, msg); |
| 32 | }; |
| 33 | |
| 34 | var O = { |
| 35 | [Symbol.toStringTag]: "LexicalThis", |
| 36 | run(n) { |
| 37 | return async passFail => `${n}. ${passFail}: ${this}`; |
| 38 | }, |
| 39 | }; |
| 40 | |
| 41 | assertEqualsAsync("1. PASS: [object LexicalThis]", () => O.run(1)("PASS")); |
| 42 | |
| 43 | var O2 = { |
| 44 | [Symbol.toStringTag]: "LexicalThis", |
| 45 | run: O.run(2) |
| 46 | }; |
| 47 | |
| 48 | assertEqualsAsync("2. PASS: [object LexicalThis]", () => O2.run("PASS")); |