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: --harmony-promises --expose-debug-as debug 6 7// Test debug events when we only listen to uncaught exceptions and 8// there is a catch handler for the exception thrown in a Promise. 9// We expect an Exception debug event with a promise to be triggered. 10 11Debug = debug.Debug; 12 13var log = []; 14var step = 0; 15 16var p = new Promise(function(resolve, reject) { 17 log.push("resolve"); 18 resolve(); 19}); 20 21var q = p.chain( 22 function() { 23 log.push("throw"); 24 throw new Error("uncaught"); // event 25 }); 26 27function listener(event, exec_state, event_data, data) { 28 try { 29 // Ignore exceptions during startup in stress runs. 30 if (step >= 1) return; 31 assertEquals(["resolve", "end main", "throw"], log); 32 if (event == Debug.DebugEvent.Exception) { 33 assertEquals(0, step); 34 assertEquals("uncaught", event_data.exception().message); 35 assertTrue(event_data.promise() instanceof Promise); 36 assertEquals(q, event_data.promise()); 37 assertTrue(event_data.uncaught()); 38 // Assert that the debug event is triggered at the throw site. 39 assertTrue(exec_state.frame(0).sourceLineText().indexOf("// event") > 0); 40 step++; 41 } 42 } catch (e) { 43 // Signal a failure with exit code 1. This is necessary since the 44 // debugger swallows exceptions and we expect the chained function 45 // and this listener to be executed after the main script is finished. 46 print("Unexpected exception: " + e + "\n" + e.stack); 47 quit(1); 48 } 49} 50 51Debug.setBreakOnUncaughtException(); 52Debug.setListener(listener); 53 54log.push("end main"); 55