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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: --harmony-promises --expose-debug-as debug
// Test debug events when an exception is thrown inside a Promise, which is
// caught by a custom promise, which throws a new exception in its reject
// handler. We expect an Exception debug event with a promise to be triggered.
Debug = debug.Debug;
var log = [];
var step = 0;
var p = new Promise(function(resolve, reject) {
log.push("resolve");
resolve();
});
function MyPromise(resolver) {
var reject = function() {
log.push("throw reject");
throw new Error("reject"); // event
};
var resolve = function() { };
log.push("construct");
resolver(resolve, reject);
};
MyPromise.prototype = p;
p.constructor = MyPromise;
var q = p.chain(
function() {
log.push("throw caught");
throw new Error("caught");
});
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Exception) {
assertEquals(["resolve", "construct", "end main",
"throw caught", "throw reject"], log);
assertEquals("reject", event_data.exception().message);
assertEquals(q, event_data.promise());
assertTrue(exec_state.frame(0).sourceLineText().indexOf('// event') > 0);
}
} catch (e) {
// Signal a failure with exit code 1. This is necessary since the
// debugger swallows exceptions and we expect the chained function
// and this listener to be executed after the main script is finished.
print("Unexpected exception: " + e + "\n" + e.stack);
quit(1);
}
}
Debug.setBreakOnUncaughtException();
Debug.setListener(listener);
log.push("end main");
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