| // 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 |
| |
| // Test debug events when we only listen to uncaught exceptions and |
| // there is only a default reject handler for the to-be-rejected Promise. |
| // We expect two Exception debug events: |
| // - when the first Promise is rejected and only has default reject handlers. |
| // - when the default reject handler passes the rejection on. |
| |
| Debug = debug.Debug; |
| |
| var expected_events = 2; |
| var log = []; |
| |
| var resolve, reject; |
| var p0 = new Promise(function(res, rej) { resolve = res; reject = rej; }); |
| var p1 = p0.then(function() { |
| log.push("p0.then"); |
| throw new Error("123"); // event |
| }); |
| var p2 = p1.then(function() { |
| log.push("p1.then"); |
| }); |
| |
| var q = new Promise(function(res, rej) { |
| log.push("resolve q"); |
| res(); |
| }); |
| |
| q.then(function() { |
| log.push("resolve p"); |
| resolve(); |
| }) |
| |
| |
| function listener(event, exec_state, event_data, data) { |
| try { |
| if (event == Debug.DebugEvent.Exception) { |
| expected_events--; |
| assertTrue(expected_events >= 0); |
| assertTrue(event_data.uncaught()); |
| assertTrue(event_data.promise() instanceof Promise); |
| if (expected_events == 1) { |
| // p1 is rejected, uncaught except for its default reject handler. |
| assertTrue( |
| exec_state.frame(0).sourceLineText().indexOf("// event") > 0); |
| assertSame(p1, event_data.promise()); |
| } else { |
| // p2 is rejected by p1's default reject handler. |
| assertEquals(0, exec_state.frameCount()); |
| assertSame(p2, 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 q", "end main", "resolve p", "p0.then"], log); |
| } else { |
| testDone(iteration + 1); |
| } |
| } catch (e) { |
| %AbortJS(e + "\n" + e.stack); |
| } |
| } |
| |
| %EnqueueMicrotask(checkResult); |
| } |
| |
| testDone(0); |