3098e24909
BUG=v8:5530 Review-Url: https://codereview.chromium.org/2480293009 Cr-Commit-Position: refs/heads/master@{#40877}
88 lines
1.5 KiB
JavaScript
88 lines
1.5 KiB
JavaScript
// Copyright 2016 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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Debug = debug.Debug
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let error = false;
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let uncaught;
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function listener(event, exec_state, event_data, data) {
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if (event != Debug.DebugEvent.Exception) return;
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try {
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uncaught = event_data.uncaught();
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} catch (e) {
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error = true;
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}
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}
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Debug.setBreakOnException();
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Debug.setListener(listener);
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function assertCaught(f) {
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try {f()} finally {
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assertFalse(uncaught);
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return;
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}
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}
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function assertUncaught(f) {
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try {f()} finally {
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assertTrue(uncaught);
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return;
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}
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}
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assertUncaught(() => {
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for (var a of [1, 2, 3]) {
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throw a
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}
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});
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assertUncaught(() => {
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for (var a of [1, 2, 3]) {
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try {throw a} finally {}
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}
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});
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assertCaught(() => {
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for (var a of [1, 2, 3]) {
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try {
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try {throw a} finally {}
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} catch(_) {}
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}
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});
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assertCaught(() => {
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try {
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for (var a of [1, 2, 3]) {
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try {throw a} finally {}
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}
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} catch(_) {}
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});
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// Check that an internal exception in our yield* desugaring is not observable.
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{
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uncaught = null;
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let iter = {
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next() {return {value:42, done:false}},
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throw() {return {done:true}}
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};
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let iterable = {[Symbol.iterator]() {return iter}};
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function* f() { yield* iterable }
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let g = f();
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g.next();
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assertEquals({value: undefined, done: true}, g.throw());
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assertNull(uncaught); // No exception event was generated.
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}
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assertFalse(error);
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