4b8200078a
Many mjsunit tests (as well as the promises-aplus adapter scripts) were using Object.observe simply for microtask-enqueueing purposes. Replaced such uses with %EnqueueMicrotask. Review URL: https://codereview.chromium.org/1246933002 Cr-Commit-Position: refs/heads/master@{#29779}
85 lines
2.2 KiB
JavaScript
85 lines
2.2 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
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// Test debug events when we only listen to uncaught exceptions and
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// there is only a default reject handler for the to-be-rejected Promise.
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// We expect two Exception debug events:
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// - when the first Promise is rejected and only has default reject handlers.
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// - when the default reject handler passes the rejection on.
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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 resolve, reject;
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var p0 = new Promise(function(res, rej) { resolve = res; reject = rej; });
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var p1 = p0.then(function() {
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log.push("p0.then");
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throw new Error("123"); // event
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});
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var p2 = p1.then(function() {
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log.push("p1.then");
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});
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var q = new Promise(function(res, rej) {
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log.push("resolve q");
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res();
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});
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q.then(function() {
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log.push("resolve p");
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resolve();
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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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assertTrue(event_data.uncaught());
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assertTrue(event_data.promise() instanceof Promise);
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if (expected_events == 1) {
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// p1 is rejected, uncaught except for its default reject handler.
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assertTrue(
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exec_state.frame(0).sourceLineText().indexOf("// event") > 0);
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assertSame(p1, event_data.promise());
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} else {
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// p2 is rejected by p1's default reject handler.
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assertEquals(0, exec_state.frameCount());
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assertSame(p2, event_data.promise());
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}
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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 q", "end main", "resolve p", "p0.then"], 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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