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Side by Side Diff: test/mjsunit/es6/debug-promises-uncaught-all.js

Issue 260723002: Trigger exception debug event for promises at the throw site. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: comments addressed Created 6 years, 7 months ago
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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 listen to all exceptions and 7 // Test debug events when we listen to all exceptions and
8 // there is a catch handler for the exception thrown in a Promise. 8 // there is a catch handler for the exception thrown in a Promise.
9 // Expectation: 9 // We expect an Exception debug event with a promise to be triggered.
10 // - the normal Exception debug event is triggered.
11 // - the PendingExceptionInPromise debug event is triggered afterwards,
12 // with the same exception object.
13 10
14 Debug = debug.Debug; 11 Debug = debug.Debug;
15 12
16 var log = []; 13 var log = [];
17 var step = 0; 14 var step = 0;
18 var exception = undefined; 15 var exception = undefined;
19 16
20 var p = new Promise(function(resolve, reject) { 17 var p = new Promise(function(resolve, reject) {
21 log.push("resolve"); 18 log.push("resolve");
22 resolve(); 19 resolve();
23 }); 20 });
24 21
25 var q = p.chain( 22 var q = p.chain(
26 function() { 23 function() {
27 log.push("throw"); 24 log.push("throw");
28 throw new Error("uncaught"); 25 throw new Error("uncaught"); // event
29 }); 26 });
30 27
31 function listener(event, exec_state, event_data, data) { 28 function listener(event, exec_state, event_data, data) {
32 try { 29 try {
33 // Ignore exceptions during startup in stress runs. 30 // Ignore exceptions during startup in stress runs.
34 if (step > 1) return; 31 if (step >= 1) return;
35 assertEquals(["resolve", "end main", "throw"], log); 32 assertEquals(["resolve", "end main", "throw"], log);
36 if (event == Debug.DebugEvent.Exception) { 33 if (event == Debug.DebugEvent.Exception) {
37 assertEquals(0, step); 34 assertEquals(0, step);
38 exception = event_data.exception(); 35 assertEquals("uncaught", event_data.exception().message);
39 assertEquals(undefined, event_data.promise());
40 } else if (event == Debug.DebugEvent.PendingExceptionInPromise) {
41 assertEquals(1, step);
42 assertEquals(exception, event_data.exception());
43 assertEquals("uncaught", exception.message);
44 assertTrue(event_data.promise() instanceof Promise); 36 assertTrue(event_data.promise() instanceof Promise);
37 assertEquals(q, event_data.promise());
45 assertTrue(event_data.uncaught()); 38 assertTrue(event_data.uncaught());
46 } else { 39 // Assert that the debug event is triggered at the throw site.
47 return; 40 assertTrue(exec_state.frame(0).sourceLineText().indexOf("// event") > 0);
41 step++;
48 } 42 }
49 step++;
50 } catch (e) { 43 } catch (e) {
51 // Signal a failure with exit code 1. This is necessary since the 44 // Signal a failure with exit code 1. This is necessary since the
52 // debugger swallows exceptions and we expect the chained function 45 // debugger swallows exceptions and we expect the chained function
53 // and this listener to be executed after the main script is finished. 46 // and this listener to be executed after the main script is finished.
54 print("Unexpected exception: " + e + "\n" + e.stack); 47 print("Unexpected exception: " + e + "\n" + e.stack);
55 quit(1); 48 quit(1);
56 } 49 }
57 } 50 }
58 51
59 Debug.setBreakOnException(); 52 Debug.setBreakOnException();
60 Debug.setListener(listener); 53 Debug.setListener(listener);
61 54
62 log.push("end main"); 55 log.push("end main");
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