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