88c8361b8f
This patch removes Promise functions and methods which are absent from the ES2015 specification when the --es-staging flag is on. The patch is being relanded after being reverted due to an unrelated bug. This version is slightly different as promise_chain is installed on the context regardless of the flag value, so that the Promise::Chain API continues to work until it is deprecated. BUG=v8:3237 R=rossberg LOG=Y Review URL: https://codereview.chromium.org/1513873002 Cr-Commit-Position: refs/heads/master@{#32772}
88 lines
2.3 KiB
JavaScript
88 lines
2.3 KiB
JavaScript
// 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 --promise-extra
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// Test debug events when an exception is thrown inside a Promise, which is
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// caught by a custom promise, which throws a new exception in its reject
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// handler. We expect two Exception debug events:
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// 1) when the exception is thrown in the promise q.
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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 = 2;
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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("throw caught");
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throw new Error("caught"); // event
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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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if (expected_events == 1) {
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assertEquals(["resolve", "construct", "end main",
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"throw caught"], log);
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assertEquals("caught", event_data.exception().message);
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} else if (expected_events == 0) {
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assertEquals("reject", event_data.exception().message);
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} else {
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assertUnreachable();
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}
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assertSame(q, event_data.promise());
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assertTrue(exec_state.frame(0).sourceLineText().indexOf('// event') > 0);
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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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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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"throw 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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%EnqueueMicrotask(checkResult);
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}
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testDone(0);
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