| // 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. |
| |
| |
| // Test debug events when an exception is thrown inside a Promise, |
| // which is caught by a custom promise, which throws a new exception |
| // in its reject handler. We expect no Exception debug events. |
| |
| Debug = debug.Debug; |
| |
| var expected_events = 0; |
| var log = []; |
| |
| var p = new Promise(function(resolve, reject) { |
| log.push("resolve"); |
| resolve(); |
| }); |
| |
| function MyPromise(resolver) { |
| var reject = function() { |
| throw new Error("reject"); // event |
| }; |
| var resolve = function() { }; |
| resolver(resolve, reject); |
| }; |
| |
| MyPromise.prototype = new Promise(function() {}); |
| MyPromise.__proto__ = Promise; |
| p.constructor = MyPromise; |
| |
| var q = p.then( |
| function() { |
| log.push("throw caught"); |
| throw new Error("caught"); // event |
| }); |
| |
| function listener(event, exec_state, event_data, data) { |
| try { |
| if (event == Debug.DebugEvent.Exception) { |
| assertUnreachable(); |
| } |
| } 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", "end main", |
| "throw caught"], log); |
| } else { |
| testDone(iteration + 1); |
| } |
| } catch (e) { |
| %AbortJS(e + "\n" + e.stack); |
| } |
| } |
| |
| %EnqueueMicrotask(checkResult); |
| } |
| |
| testDone(0); |