1 // Copyright 2016 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 6 // Flags: --harmony-async-await --allow-natives-syntax 7 8 var Debug = debug.Debug; 9 10 function assertEqualsAsync(expected, run, msg) { 11 var actual; 12 var hadValue = false; 13 var hadError = false; 14 var promise = run(); 15 16 if (typeof promise !== "object" || typeof promise.then !== "function") { 17 throw new MjsUnitAssertionError( 18 "Expected " + run.toString() + 19 " to return a Promise, but it returned " + promise); 20 } 21 22 promise.then(function(value) { hadValue = true; actual = value; }, 23 function(error) { hadError = true; actual = error; }); 24 25 assertFalse(hadValue || hadError); 26 27 %RunMicrotasks(); 28 29 if (hadError) throw actual; 30 31 assertTrue( 32 hadValue, "Expected '" + run.toString() + "' to produce a value"); 33 34 assertEquals(expected, actual, msg); 35 } 36 37 var break_count = 0; 38 var exception = null; 39 40 function listener(event, exec_state, event_data, data) { 41 if (event != Debug.DebugEvent.Break) return; 42 try { 43 break_count++; 44 var line = exec_state.frame(0).sourceLineText(); 45 assertTrue(line.indexOf(`B${break_count}`) > 0); 46 } catch (e) { 47 exception = e; 48 } 49 } 50 51 Debug.setListener(listener); 52 53 async function g() { 54 throw 1; 55 } 56 57 async function f() { 58 try { 59 await g(); // B1 60 } catch (e) {} 61 assertEquals(2, break_count); // B2 62 return 1; // B3 63 } 64 65 Debug.setBreakPoint(f, 2); 66 Debug.setBreakPoint(f, 4); 67 Debug.setBreakPoint(f, 5); 68 69 f(); 70 71 %RunMicrotasks(); 72 73 assertEqualsAsync(3, async () => break_count); 74 assertEqualsAsync(null, async () => exception); 75 76 Debug.setListener(null); 77
