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Side by Side Diff: test/mjsunit/es6/debug-promises/reject-with-invalid-reject.js

Issue 440773004: Trigger exception debug events on Promise reject. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: comments Created 6 years, 4 months ago
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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 a Promise is rejected, which is caught by a custom
8 // promise, which has a number for reject closure. We expect an Exception debug
9 // events trying to call the invalid reject closure.
10
11 Debug = debug.Debug;
12
13 var expected_events = 1;
14 var log = [];
15
16 var p = new Promise(function(resolve, reject) {
17 log.push("resolve");
18 resolve();
19 });
20
21 function MyPromise(resolver) {
22 var reject = 1;
23 var resolve = function() { };
24 log.push("construct");
25 resolver(resolve, reject);
26 };
27
28 MyPromise.prototype = new Promise(function() {});
29 p.constructor = MyPromise;
30
31 var q = p.chain(
32 function() {
33 log.push("reject caught");
34 return Promise.reject(new Error("caught"));
35 });
36
37 function listener(event, exec_state, event_data, data) {
38 try {
39 if (event == Debug.DebugEvent.Exception) {
40 expected_events--;
41 assertTrue(expected_events >= 0);
42 assertEquals("number is not a function", event_data.exception().message);
43 // All of the frames on the stack are from native Javascript.
44 assertEquals(0, exec_state.frameCount());
45 assertEquals(q, event_data.promise());
46 }
47 } catch (e) {
48 %AbortJS(e + "\n" + e.stack);
49 }
50 }
51
52 Debug.setBreakOnUncaughtException();
53 Debug.setListener(listener);
54
55 function testDone(iteration) {
56 function checkResult() {
57 try {
58 assertTrue(iteration < 10);
59 if (expected_events === 0) {
60 assertEquals(["resolve", "construct", "end main", "reject caught"],
61 log);
62 } else {
63 testDone(iteration + 1);
64 }
65 } catch (e) {
66 %AbortJS(e + "\n" + e.stack);
67 }
68 }
69
70 // Run testDone through the Object.observe processing loop.
71 var dummy = {};
72 Object.observe(dummy, checkResult);
73 dummy.dummy = dummy;
74 }
75
76 testDone(0);
77
78 log.push("end main");
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