88 lines
2.4 KiB
JavaScript
88 lines
2.4 KiB
JavaScript
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// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --expose-debug-as debug --allow-natives-syntax
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// Test debug events when a Promise is rejected, which is caught by a
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// custom promise, which throws a new exception in its reject handler.
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// We expect two Exception debug events:
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// 1) when promise q is rejected.
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// 2) when the custom reject closure in MyPromise throws an exception.
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Debug = debug.Debug;
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var expected_events = 1;
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var log = [];
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var p = new Promise(function(resolve, reject) {
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log.push("resolve");
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resolve();
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});
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function MyPromise(resolver) {
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var reject = function() {
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log.push("throw in reject");
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throw new Error("reject"); // event
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};
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var resolve = function() { };
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log.push("construct");
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resolver(resolve, reject);
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};
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MyPromise.prototype = new Promise(function() {});
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p.constructor = MyPromise;
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var q = p.chain(
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function() {
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log.push("reject caught");
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return Promise.reject(new Error("caught"));
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});
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function listener(event, exec_state, event_data, data) {
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try {
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if (event == Debug.DebugEvent.Exception) {
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expected_events--;
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assertTrue(expected_events >= 0);
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assertEquals("reject", event_data.exception().message);
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// Assert that the debug event is triggered at the throw site.
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assertTrue(
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exec_state.frame(0).sourceLineText().indexOf("// event") > 0);
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}
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} catch (e) {
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// Signal a failure with exit code 1. This is necessary since the
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// debugger swallows exceptions and we expect the chained function
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// and this listener to be executed after the main script is finished.
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print("Unexpected exception: " + e + "\n" + e.stack);
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quit(1);
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}
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}
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Debug.setBreakOnUncaughtException();
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Debug.setListener(listener);
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log.push("end main");
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function testDone(iteration) {
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function checkResult() {
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try {
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assertTrue(iteration < 10);
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if (expected_events === 0) {
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assertEquals(["resolve", "construct", "end main",
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"reject caught", "throw in reject"], log);
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} else {
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testDone(iteration + 1);
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}
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} catch (e) {
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%AbortJS(e + "\n" + e.stack);
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}
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}
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// Run testDone through the Object.observe processing loop.
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var dummy = {};
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Object.observe(dummy, checkResult);
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dummy.dummy = dummy;
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}
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testDone(0);
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