| // Copyright 2015 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 |
| |
| Debug = debug.Debug |
| |
| var exception = null; |
| var break_count = 0; |
| |
| function listener(event, exec_state, event_data, data) { |
| if (event != Debug.DebugEvent.Break) return; |
| try { |
| print(event_data.sourceLineText()); |
| assertTrue( |
| event_data.sourceLineText().indexOf(`Break ${break_count++}.`) > 0); |
| exec_state.prepareStep(Debug.StepAction.StepIn); |
| } catch (e) { |
| exception = e; |
| } |
| }; |
| |
| function toJsonCallback() { |
| return "x"; // Break 2. |
| } // Break 3. |
| var o = {}; |
| o.toJSON = toJsonCallback; |
| |
| Debug.setListener(listener); |
| debugger; // Break 0. |
| var result = JSON.stringify(o); // Break 1. |
| Debug.setListener(null); // Break 4. |
| |
| assertEquals('"x"', result); |
| assertNull(exception); |