// 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 --allow-natives-syntax --noalways-opt // Tests stepping into through Promises. Debug = debug.Debug var exception = null; var break_count = 0; var expected_breaks = -1; function listener(event, exec_state, event_data, data) { try { if (event == Debug.DebugEvent.Break) { assertTrue(exec_state.frameCount() != 0, "FAIL: Empty stack trace"); if (!break_count) { // Count number of expected breakpoints in this source file. var source_text = exec_state.frame(0).func().script().source(); expected_breaks = source_text.match(/\/\/\s*Break\s+\d+\./g).length; print("Expected breaks: " + expected_breaks); } var source = exec_state.frame(0).sourceLineText(); print("paused at: " + source); assertTrue(source.indexOf("// Break " + break_count + ".") > 0, "Unexpected pause at: " + source + "\n" + "Expected: // Break " + break_count + "."); ++break_count; if (break_count !== expected_breaks) { exec_state.prepareStep(Debug.StepAction.StepIn); } } } catch(e) { exception = e; print(e, e.stack); } }; Debug.setListener(listener); Promise.resolve(42) .then( function f0() { debugger; // Break 0. } // Break 1. ) .then(callback) .then(callback.bind(null)) .then(Object) .then(callback.bind(null).bind(null)) .then(finalize) .catch(function(err) { %AbortJS("FAIL: " + err); }); function callback(x) { return x; // Break 2. // Break 4. // Break 6. } // Break 3. // Break 5. // Break 7. function finalize() { assertNull(exception); // Break 8. assertEquals(expected_breaks, break_count); Debug.setListener(null); }