Trigger exception debug events on Promise reject.

test/mjsunit/es6/debug-promises/reject-uncaught-uncaught.js

Index: test/mjsunit/es6/debug-promises/reject-uncaught-uncaught.js
diff --git a/test/mjsunit/es6/debug-promises/reject-uncaught-uncaught.js b/test/mjsunit/es6/debug-promises/reject-uncaught-uncaught.js
new file mode 100644
index 0000000000000000000000000000000000000000..364217ca306ca44109caaec1b90c197909c27755
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+++ b/test/mjsunit/es6/debug-promises/reject-uncaught-uncaught.js
@@ -0,0 +1,69 @@
+// 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 we only listen to uncaught exceptions and
+// there is no catch handler for the to-be-rejected Promise.
+// We expect an Exception debug event with a promise to be triggered.
+
+Debug = debug.Debug;
+
+var expected_events = 1;
+var log = [];
+
+var p = new Promise(function(resolve, reject) {
+  log.push("resolve");
+  resolve();
+});
+
+var q = p.chain(
+  function() {
+    log.push("reject");
+    return Promise.reject(Error("uncaught reject"));  // event
+  });
+
+function listener(event, exec_state, event_data, data) {
+  try {
+    if (event == Debug.DebugEvent.Exception) {
+      expected_events--;
+      assertTrue(expected_events >= 0);
+      assertEquals("uncaught reject", event_data.exception().message);
+      assertTrue(event_data.promise() instanceof Promise);
+      assertEquals(q, event_data.promise());
+      assertTrue(event_data.uncaught());
+      // All of the frames on the stack are from native Javascript.
+      assertEquals(0, exec_state.frameCount());
+    }
+  } 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", "end main", "reject"], 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);