Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2014 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: --expose-debug-as debug --allow-natives-syntax |
| 6 | |
| 7 | // Test debug events when an exception is thrown inside a Promise, which is |
| 8 | // caught by a custom promise, which has no reject handler. |
| 9 | // We expect two Exception debug events: |
| 10 | // 1) when the exception is thrown in the promise q. |
| 11 | // 2) when calling the undefined custom reject closure in MyPromise throws. |
| 12 | |
| 13 | Debug = debug.Debug; |
| 14 | |
| 15 | var expected_events = 2; |
| 16 | var log = []; |
| 17 | |
| 18 | var p = new Promise(function(resolve, reject) { |
| 19 | log.push("resolve"); |
| 20 | resolve(); |
| 21 | }); |
| 22 | |
| 23 | function MyPromise(resolver) { |
| 24 | var reject = undefined; |
| 25 | var resolve = function() { }; |
| 26 | log.push("construct"); |
| 27 | resolver(resolve, reject); |
| 28 | }; |
| 29 | |
| 30 | MyPromise.prototype = new Promise(function() {}); |
| 31 | p.constructor = MyPromise; |
| 32 | |
| 33 | var q = p.chain( |
| 34 | function() { |
| 35 | log.push("throw caught"); |
| 36 | throw new Error("caught"); // event |
| 37 | }); |
| 38 | |
| 39 | function listener(event, exec_state, event_data, data) { |
| 40 | try { |
| 41 | if (event == Debug.DebugEvent.Exception) { |
| 42 | expected_events--; |
| 43 | assertTrue(expected_events >= 0); |
| 44 | if (expected_events == 1) { |
| 45 | assertTrue( |
| 46 | exec_state.frame(0).sourceLineText().indexOf('// event') > 0); |
| 47 | assertEquals("caught", event_data.exception().message); |
| 48 | } else if (expected_events == 0) { |
| 49 | // All of the frames on the stack are from native Javascript. |
| 50 | assertEquals(0, exec_state.frameCount()); |
| 51 | assertEquals("undefined is not a function", |
| 52 | event_data.exception().message); |
| 53 | } else { |
| 54 | assertUnreachable(); |
| 55 | } |
| 56 | assertSame(q, event_data.promise()); |
| 57 | } |
| 58 | } catch (e) { |
| 59 | %AbortJS(e + "\n" + e.stack); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | Debug.setBreakOnUncaughtException(); |
| 64 | Debug.setListener(listener); |
| 65 | |
| 66 | log.push("end main"); |
| 67 | |
| 68 | function testDone(iteration) { |
| 69 | function checkResult() { |
| 70 | try { |
| 71 | assertTrue(iteration < 10); |
| 72 | if (expected_events === 0) { |
| 73 | assertEquals(["resolve", "construct", "end main", "throw caught"], log); |
| 74 | } else { |
| 75 | testDone(iteration + 1); |
| 76 | } |
| 77 | } catch (e) { |
| 78 | %AbortJS(e + "\n" + e.stack); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | // Run testDone through the Object.observe processing loop. |
| 83 | var dummy = {}; |
| 84 | Object.observe(dummy, checkResult); |
| 85 | dummy.dummy = dummy; |
| 86 | } |
| 87 | |
| 88 | testDone(0); |