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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: --allow-natives-syntax --expose-debug-as debug
6
7 Debug = debug.Debug;
8
9 var eventsExpected = 16;
10 var exception = null;
11 var result = [];
12
13 function updatePromise(promise, parentPromise, status, value) {
14 var i;
15 for (i = 0; i < result.length; ++i) {
16 if (result[i].promise === promise) {
17 result[i].parentPromise = parentPromise || result[i].parentPromise;
18 result[i].status = status || result[i].status;
19 result[i].value = value || result[i].value;
20 break;
21 }
22 }
23 assertTrue(i < result.length);
24 }
25
26 function listener(event, exec_state, event_data, data) {
27 if (event != Debug.DebugEvent.PromiseEvent) return;
28 try {
29 eventsExpected--;
30 assertTrue(event_data.promise().isPromise());
31 if (event_data.status() === 0) {
32 // New promise.
33 assertEquals("pending", event_data.promise().status());
34 result.push({ promise: event_data.promise().value(), status: 0 });
35 assertTrue(exec_state.frame(0).sourceLineText().indexOf("// event") > 0);
36 } else if (event_data.status() !== undefined) {
37 // Resolve/reject promise.
38 updatePromise(event_data.promise().value(),
39 undefined,
40 event_data.status(),
41 event_data.value().value());
42 } else {
43 // Chain promises.
44 assertTrue(event_data.parentPromise().isPromise());
45 updatePromise(event_data.promise().value(),
46 event_data.parentPromise().value());
47 assertTrue(exec_state.frame(0).sourceLineText().indexOf("// event") > 0);
48 }
49 } catch (e) {
50 print(e + e.stack)
51 exception = e;
52 }
53 }
54
55 Debug.setListener(listener);
56
57 function resolver(resolve, reject) { resolve(); }
58
59 var p1 = new Promise(resolver); // event
60 var p2 = p1.then().then(); // event
61 var p3 = new Promise(function(resolve, reject) { // event
62 reject("rejected");
63 });
64 var p4 = p3.then(); // event
65 var p5 = p1.then(); // event
66
67 function assertAsync(b, s) {
68 if (b) {
69 print(s, "succeeded");
70 } else {
71 %AbortJS(s + " FAILED!");
72 }
73 }
74
75 function testDone(iteration) {
76 function checkResult() {
77 if (eventsExpected === 0) {
78 assertAsync(result.length === 6, "result.length");
79
80 assertAsync(result[0].promise === p1, "result[0].promise");
81 assertAsync(result[0].parentPromise === undefined,
82 "result[0].parentPromise");
83 assertAsync(result[0].status === 1, "result[0].status");
84 assertAsync(result[0].value === undefined, "result[0].value");
85
86 assertAsync(result[1].parentPromise === p1,
87 "result[1].parentPromise");
88 assertAsync(result[1].status === 1, "result[1].status");
89
90 assertAsync(result[2].promise === p2, "result[2].promise");
91
92 assertAsync(result[3].promise === p3, "result[3].promise");
93 assertAsync(result[3].parentPromise === undefined,
94 "result[3].parentPromise");
95 assertAsync(result[3].status === -1, "result[3].status");
96 assertAsync(result[3].value === "rejected", "result[3].value");
97
98 assertAsync(result[4].promise === p4, "result[4].promise");
99 assertAsync(result[4].parentPromise === p3,
100 "result[4].parentPromise");
101 assertAsync(result[4].status === -1, "result[4].status");
102 assertAsync(result[4].value === "rejected", "result[4].value");
103
104 assertAsync(result[5].promise === p5, "result[5].promise");
105 assertAsync(result[5].parentPromise === p1,
106 "result[5].parentPromise");
107 assertAsync(result[5].status === 1, "result[5].status");
108
109 assertAsync(exception === null, "exception === null");
110 Debug.setListener(null);
111 } else if (iteration > 10) {
112 %AbortJS("Not all events were received!");
113 } else {
114 testDone(iteration + 1);
115 }
116 }
117
118 var iteration = iteration || 0;
119 var dummy = {};
120 Object.observe(dummy, checkResult);
121 dummy.dummy = dummy;
122 }
123
124 testDone();
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