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 3 // found in the LICENSE file. 4 5 // Flags: --expose-debug-as debug --allow-natives-syntax 6 7 // Test debug events when we only listen to uncaught exceptions and 8 // there is only a default reject handler for the to-be-rejected Promise. 9 // We expect two Exception debug events: 10 // - when the first Promise is rejected and only has default reject handlers. 11 // - when the default reject handler passes the rejection on. 12 13 Debug = debug.Debug; 14 15 var expected_events = 2; 16 var log = []; 17 18 var resolve, reject; 19 var p0 = new Promise(function(res, rej) { resolve = res; reject = rej; }); 20 var p1 = p0.then(function() { 21 log.push("p0.then"); 22 return Promise.reject(new Error("123")); 23 }); 24 var p2 = p1.then(function() { 25 log.push("p1.then"); 26 }); 27 28 var q = new Promise(function(res, rej) { 29 log.push("resolve q"); 30 res(); 31 }); 32 33 q.then(function() { 34 log.push("resolve p"); 35 resolve(); 36 }) 37 38 39 function listener(event, exec_state, event_data, data) { 40 try { 41 if (event == Debug.DebugEvent.Exception) { 42 expected_events--; 43 assertTrue(expected_events >= 0); 44 assertTrue(event_data.uncaught()); 45 assertTrue(event_data.promise() instanceof Promise); 46 if (expected_events == 1) { 47 // p1 is rejected, uncaught except for its default reject handler. 48 assertEquals(0, exec_state.frameCount()); 49 assertSame(p1, event_data.promise()); 50 } else { 51 // p2 is rejected by p1's default reject handler. 52 assertEquals(0, exec_state.frameCount()); 53 assertSame(p2, event_data.promise()); 54 } 55 } 56 } catch (e) { 57 %AbortJS(e + "\n" + e.stack); 58 } 59 } 60 61 Debug.setBreakOnUncaughtException(); 62 Debug.setListener(listener); 63 64 log.push("end main"); 65 66 function testDone(iteration) { 67 function checkResult() { 68 try { 69 assertTrue(iteration < 10); 70 if (expected_events === 0) { 71 assertEquals(["resolve q", "end main", "resolve p", "p0.then"], log); 72 } else { 73 testDone(iteration + 1); 74 } 75 } catch (e) { 76 %AbortJS(e + "\n" + e.stack); 77 } 78 } 79 80 %EnqueueMicrotask(checkResult); 81 } 82 83 testDone(0); 84
