Trigger exception debug events on Promise reject.

test/mjsunit/es6/debug-promises/reject-with-undefined-reject.js

+// 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 a Promise is rejected, which is caught by a custom
+// promise, which has undefined for reject closure.  We expect an Exception
+// debug even calling the (undefined) custom rejected closure.
+
+Debug = debug.Debug;
+
+var expected_events = 1;
+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("reject caught");
+    return Promise.reject(new Error("caught"));
+  });
+
+function listener(event, exec_state, event_data, data) {
+  try {
+    if (event == Debug.DebugEvent.Exception) {
+      expected_events--;
+      assertTrue(expected_events >= 0);
+      assertEquals("caught", event_data.exception().message);
+      // All of the frames on the stack are from native Javascript.
+      assertEquals(0, exec_state.frameCount());
+      assertEquals(q, event_data.promise());
+    }
+  } catch (e) {
+    %AbortJS(e + "\n" + e.stack);
+  }
+}
+
+Debug.setBreakOnUncaughtException();
+Debug.setListener(listener);
+
+function testDone(iteration) {
+  function checkResult() {
+    try {
+      assertTrue(iteration < 10);
+      if (expected_events === 0) {
+        assertEquals(["resolve", "construct", "end main", "reject 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);
+
+log.push("end main");