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// Copyright 2014 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
// Test debug events when an exception is thrown inside a Promise, which is
// caught by a custom promise, which has no reject handler.
// We expect two Exception debug events:
// 1) when the exception is thrown in the promise q.
// 2) when calling the undefined custom reject closure in MyPromise throws.
Debug = debug.Debug;
var expected_events = 2;
var log = [];
var p = new Promise(function(resolve, reject) {
log.push("resolve");
resolve();
});
function MyPromise(resolver) {
var reject = undefined;
var resolve = function() { };
log.push("construct");
resolver(resolve, reject);
};
MyPromise.prototype = new Promise(function() {});
p.constructor = MyPromise;
var q = p.chain(
function() {
log.push("throw caught");
throw new Error("caught"); // event
});
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Exception) {
expected_events--;
assertTrue(expected_events >= 0);
if (expected_events == 1) {
assertTrue(
exec_state.frame(0).sourceLineText().indexOf('// event') > 0);
assertEquals("caught", event_data.exception().message);
} else if (expected_events == 0) {
// All of the frames on the stack are from native Javascript.
assertEquals(0, exec_state.frameCount());
assertEquals("undefined is not a function",
event_data.exception().message);
} else {
assertUnreachable();
}
assertSame(q, event_data.promise());
}
} catch (e) {
%AbortJS(e + "\n" + e.stack);
}
}
Debug.setBreakOnUncaughtException();
Debug.setListener(listener);
log.push("end main");
function testDone(iteration) {
function checkResult() {
try {
assertTrue(iteration < 10);
if (expected_events === 0) {
assertEquals(["resolve", "construct", "end main", "throw caught"], log);
} else {
testDone(iteration + 1);
}
} catch (e) {
%AbortJS(e + "\n" + e.stack);
}
}
// Run testDone through the Object.observe processing loop.
var dummy = {};
Object.observe(dummy, checkResult);
dummy.dummy = dummy;
}
testDone(0);
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