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Unified Diff: test/mjsunit/es6/debug-promises/throw-with-undefined-reject.js

Issue 440773004: Trigger exception debug events on Promise reject. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: comments Created 6 years, 4 months ago
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Index: test/mjsunit/es6/debug-promises/throw-with-undefined-reject.js
diff --git a/test/mjsunit/es6/debug-promises/throw-with-undefined-reject.js b/test/mjsunit/es6/debug-promises/throw-with-undefined-reject.js
new file mode 100644
index 0000000000000000000000000000000000000000..0162fe1006e55db7755abaffb9109927f4768505
--- /dev/null
+++ b/test/mjsunit/es6/debug-promises/throw-with-undefined-reject.js
@@ -0,0 +1,88 @@
+// 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: --expose-debug-as debug --allow-natives-syntax
+
+// Test debug events when an exception is thrown inside a Promise, which is
+// caught by a custom promise, which has no reject handler.
+// We expect two Exception debug events:
+// 1) when the exception is thrown in the promise q.
+// 2) when calling the undefined custom reject closure in MyPromise throws.
+
+Debug = debug.Debug;
+
+var expected_events = 2;
+var log = [];
+
+var p = new Promise(function(resolve, reject) {
+ log.push("resolve");
+ resolve();
+});
+
+function MyPromise(resolver) {
+ var reject = undefined;
+ var resolve = function() { };
+ log.push("construct");
+ resolver(resolve, reject);
+};
+
+MyPromise.prototype = new Promise(function() {});
+p.constructor = MyPromise;
+
+var q = p.chain(
+ function() {
+ log.push("throw caught");
+ throw new Error("caught"); // event
+ });
+
+function listener(event, exec_state, event_data, data) {
+ try {
+ if (event == Debug.DebugEvent.Exception) {
+ expected_events--;
+ assertTrue(expected_events >= 0);
+ if (expected_events == 1) {
+ assertTrue(
+ exec_state.frame(0).sourceLineText().indexOf('// event') > 0);
+ assertEquals("caught", event_data.exception().message);
+ } else if (expected_events == 0) {
+ // All of the frames on the stack are from native Javascript.
+ assertEquals(0, exec_state.frameCount());
+ assertEquals("undefined is not a function",
+ event_data.exception().message);
+ } else {
+ assertUnreachable();
+ }
+ assertEquals(q, event_data.promise());
+ }
+ } catch (e) {
+ %AbortJS(e + "\n" + e.stack);
+ }
+}
+
+Debug.setBreakOnUncaughtException();
+Debug.setListener(listener);
+
+log.push("end main");
+
+function testDone(iteration) {
+ function checkResult() {
+ try {
+ assertTrue(iteration < 10);
+ if (expected_events === 0) {
+ assertEquals(["resolve", "construct", "end main", "throw caught"], log);
+ } else {
+ testDone(iteration + 1);
+ }
+ } catch (e) {
+ %AbortJS(e + "\n" + e.stack);
+ }
+ }
+
+ // Run testDone through the Object.observe processing loop.
+ var dummy = {};
+ Object.observe(dummy, checkResult);
+ dummy.dummy = dummy;
+}
+
+testDone(0);

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