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|  | 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 Debug = debug.Debug; | 
|  | 8 | 
|  | 9 var base_id = -1; | 
|  | 10 var exception = null; | 
|  | 11 var expected = [ | 
|  | 12   "enqueue #1", | 
|  | 13   "willHandle #1", | 
|  | 14   "then #1", | 
|  | 15   "enqueue #2", | 
|  | 16   "didHandle #1", | 
|  | 17   "willHandle #2", | 
|  | 18   "then #2", | 
|  | 19   "didHandle #2", | 
|  | 20   "enqueue #3", | 
|  | 21   "willHandle #3", | 
|  | 22   "didHandle #3" | 
|  | 23 ]; | 
|  | 24 | 
|  | 25 function assertLog(msg) { | 
|  | 26   print(msg); | 
|  | 27   assertTrue(expected.length > 0); | 
|  | 28   assertEquals(expected.shift(), msg); | 
|  | 29   if (!expected.length) { | 
|  | 30     Debug.setListener(null); | 
|  | 31   } | 
|  | 32 } | 
|  | 33 | 
|  | 34 function listener(event, exec_state, event_data, data) { | 
|  | 35   if (event != Debug.DebugEvent.AsyncTaskEvent) return; | 
|  | 36   try { | 
|  | 37     if (base_id < 0) | 
|  | 38       base_id = event_data.id(); | 
|  | 39     var id = event_data.id() - base_id + 1; | 
|  | 40     assertEquals("Promise.resolve", event_data.name()); | 
|  | 41     assertLog(event_data.type() + " #" + id); | 
|  | 42   } catch (e) { | 
|  | 43     print(e + e.stack) | 
|  | 44     exception = e; | 
|  | 45   } | 
|  | 46 } | 
|  | 47 | 
|  | 48 Debug.setListener(listener); | 
|  | 49 | 
|  | 50 var resolver; | 
|  | 51 var p = new Promise(function(resolve, reject) { | 
|  | 52   resolver = resolve; | 
|  | 53 }); | 
|  | 54 p.then(function() { | 
|  | 55   assertLog("then #1"); | 
|  | 56 }).then(function() { | 
|  | 57   assertLog("then #2"); | 
|  | 58 }); | 
|  | 59 resolver(); | 
|  | 60 | 
|  | 61 %RunMicrotasks(); | 
|  | 62 | 
|  | 63 assertNull(exception); | 
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