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Unified Diff: test/mjsunit/es6/debug-promises-async-task-event.js

Issue 362783002: Introduce debug events for Microtask queue. (Closed) Base URL: git://github.com/v8/v8.git@master
Patch Set: addressed Created 6 years, 6 months ago
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Index: test/mjsunit/es6/debug-promises-async-task-event.js
diff --git a/test/mjsunit/es6/debug-promises-async-task-event.js b/test/mjsunit/es6/debug-promises-async-task-event.js
new file mode 100644
index 0000000000000000000000000000000000000000..eba5f8eb9f0cf1be6dff5b217574aba3176e4bdd
--- /dev/null
+++ b/test/mjsunit/es6/debug-promises-async-task-event.js
@@ -0,0 +1,61 @@
+// 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
+
+Debug = debug.Debug;
+
+var base_id = -1;
+var exception = null;
+var expected = [
+ "enqueue #1",
+ "willHandle #1",
+ "then #1",
+ "enqueue #2",
+ "didHandle #1",
+ "willHandle #2",
+ "then #2",
+ "enqueue #3",
+ "didHandle #2",
+ "willHandle #3",
+ "didHandle #3"
+];
+
+function assertLog(msg) {
+ print(msg);
+ assertTrue(expected.length > 0);
+ assertEquals(expected.shift(), msg);
+ if (!expected.length) {
+ Debug.setListener(null);
+ }
+}
+
+function listener(event, exec_state, event_data, data) {
+ if (event != Debug.DebugEvent.AsyncTaskEvent) return;
+ try {
+ if (base_id < 0)
+ base_id = event_data.id();
+ var id = event_data.id() - base_id + 1;
+ assertEquals("Promise.Resolved", event_data.name());
+ assertLog(event_data.type() + " #" + id);
+ } catch (e) {
+ print(e + e.stack)
+ exception = e;
+ }
+}
+
+Debug.setListener(listener);
+
+var resolver;
+var p = new Promise(function(resolve, reject) {
+ resolver = resolve;
+});
+p.then(function() {
+ assertLog("then #1");
+}).then(function() {
+ assertLog("then #2");
+});
+resolver();
+
+assertNull(exception);
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