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1 // Copyright 2014 the V8 project authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Flags: --harmony-promises --expose-debug-as debug | 5 // Flags: --harmony-promises --expose-debug-as debug |
6 | 6 |
7 // Test debug events when we only listen to uncaught exceptions and | 7 // Test debug events when we only listen to uncaught exceptions and |
8 // there is a catch handler for the exception thrown in a Promise. | 8 // an exception is thrown in the the Promise constructor. |
9 // Expectation: | 9 // We expect an Exception debug event with a promise to be triggered. |
10 // - only the PendingExceptionInPromise debug event is triggered. | |
11 | 10 |
12 Debug = debug.Debug; | 11 Debug = debug.Debug; |
13 | 12 |
14 var log = []; | |
15 var step = 0; | 13 var step = 0; |
16 | 14 var exception = null; |
17 var p = new Promise(function(resolve, reject) { | |
18 log.push("resolve"); | |
19 resolve(); | |
20 }); | |
21 | |
22 var q = p.chain( | |
23 function() { | |
24 log.push("throw"); | |
25 throw new Error("uncaught"); | |
26 }); | |
27 | 15 |
28 function listener(event, exec_state, event_data, data) { | 16 function listener(event, exec_state, event_data, data) { |
29 try { | 17 try { |
30 // Ignore exceptions during startup in stress runs. | 18 // Ignore exceptions during startup in stress runs. |
31 if (step >= 1) return; | 19 if (step >= 1) return; |
32 assertEquals(["resolve", "end main", "throw"], log); | |
33 if (event == Debug.DebugEvent.Exception) { | 20 if (event == Debug.DebugEvent.Exception) { |
34 assertUnreachable(); | |
35 } else if (event == Debug.DebugEvent.PendingExceptionInPromise) { | |
36 assertEquals(0, step); | 21 assertEquals(0, step); |
37 assertEquals("uncaught", event_data.exception().message); | 22 assertEquals("uncaught", event_data.exception().message); |
38 assertTrue(event_data.promise() instanceof Promise); | 23 assertTrue(event_data.promise() instanceof Promise); |
39 assertTrue(event_data.uncaught()); | 24 assertTrue(event_data.uncaught()); |
| 25 // Assert that the debug event is triggered at the throw site. |
| 26 assertTrue(exec_state.frame(0).sourceLineText().indexOf("// event") > 0); |
40 step++; | 27 step++; |
41 } | 28 } |
42 } catch (e) { | 29 } catch (e) { |
43 // Signal a failure with exit code 1. This is necessary since the | 30 // Signal a failure with exit code 1. This is necessary since the |
44 // debugger swallows exceptions and we expect the chained function | 31 // debugger swallows exceptions and we expect the chained function |
45 // and this listener to be executed after the main script is finished. | 32 // and this listener to be executed after the main script is finished. |
46 print("Unexpected exception: " + e + "\n" + e.stack); | 33 print("Unexpected exception: " + e + "\n" + e.stack); |
47 quit(1); | 34 exception = e; |
48 } | 35 } |
49 } | 36 } |
50 | 37 |
51 Debug.setBreakOnUncaughtException(); | 38 Debug.setBreakOnUncaughtException(); |
52 Debug.setListener(listener); | 39 Debug.setListener(listener); |
53 | 40 |
54 log.push("end main"); | 41 var p = new Promise(function(resolve, reject) { |
| 42 throw new Error("uncaught"); // event |
| 43 }); |
| 44 |
| 45 assertEquals(1, step); |
| 46 assertNull(exception); |
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