| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Flags: --expose-debug-as debug --allow-natives-syntax --promise-extra |
| |
| // Test debug events when an exception is thrown inside a Promise, which is |
| // caught by a custom promise, which has no reject handler. |
| // We expect two Exception debug events: |
| // 1) when the exception is thrown in the promise q. |
| // 2) when calling the undefined custom reject closure in MyPromise throws. |
| |
| Debug = debug.Debug; |
| |
| var expected_events = 2; |
| var log = []; |
| |
| var p = new Promise(function(resolve, reject) { |
| log.push("resolve"); |
| resolve(); |
| }); |
| |
| function MyPromise(resolver) { |
| var reject = undefined; |
| var resolve = function() { }; |
| log.push("construct"); |
| resolver(resolve, reject); |
| }; |
| |
| MyPromise.prototype = new Promise(function() {}); |
| p.constructor = MyPromise; |
| |
| var q = p.chain( |
| function() { |
| log.push("throw caught"); |
| throw new Error("caught"); // event |
| }); |
| |
| function listener(event, exec_state, event_data, data) { |
| try { |
| if (event == Debug.DebugEvent.Exception) { |
| expected_events--; |
| assertTrue(expected_events >= 0); |
| if (expected_events == 1) { |
| assertTrue( |
| exec_state.frame(0).sourceLineText().indexOf('// event') > 0); |
| assertEquals("caught", event_data.exception().message); |
| } else if (expected_events == 0) { |
| // All of the frames on the stack are from native Javascript. |
| assertEquals(0, exec_state.frameCount()); |
| assertEquals("(var).reject is not a function", |
| event_data.exception().message); |
| } else { |
| assertUnreachable(); |
| } |
| assertSame(q, event_data.promise()); |
| } |
| } catch (e) { |
| %AbortJS(e + "\n" + e.stack); |
| } |
| } |
| |
| Debug.setBreakOnUncaughtException(); |
| Debug.setListener(listener); |
| |
| log.push("end main"); |
| |
| function testDone(iteration) { |
| function checkResult() { |
| try { |
| assertTrue(iteration < 10); |
| if (expected_events === 0) { |
| assertEquals(["resolve", "construct", "end main", "throw caught"], log); |
| } else { |
| testDone(iteration + 1); |
| } |
| } catch (e) { |
| %AbortJS(e + "\n" + e.stack); |
| } |
| } |
| |
| %EnqueueMicrotask(checkResult); |
| } |
| |
| testDone(0); |