Display isolate message queue in Observatory debugger

runtime/vm/message_handler_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/message_handler.h"
 #include "vm/port.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
@@ skipping 140 matching lines @@
 UNIT_TEST_CASE(MessageHandler_HasOOBMessages) {
   TestMessageHandler handler;
   MessageHandlerTestPeer handler_peer(&handler);
 
   EXPECT(!handler.HasOOBMessages());
 
   // Post a normal message.
   Message* message = new Message(1, NULL, 0, Message::kNormalPriority);
   handler_peer.PostMessage(message);
   EXPECT(!handler.HasOOBMessages());
+  {
+    // Acquire ownership of message handler queues, verify one regular message.
+    MessageHandler::AcquiredQueues aq;
+    handler.AcquireQueues(&aq);
+    EXPECT(aq.queue()->Length() == 1);
+  }
 
   // Post an oob message.
   message = new Message(1, NULL, 0, Message::kOOBPriority);
   handler_peer.PostMessage(message);
   EXPECT(handler.HasOOBMessages());
+  {
+    // Acquire ownership of message handler queues, verify one regular and one
+    // OOB message.
+    MessageHandler::AcquiredQueues aq;
+    handler.AcquireQueues(&aq);
+    EXPECT(aq.queue()->Length() == 1);
+    EXPECT(aq.oob_queue()->Length() == 1);
+  }
 
   // Delete all pending messages.
   handler_peer.CloseAllPorts();
 }
 
 
 UNIT_TEST_CASE(MessageHandler_ClosePort) {
   TestMessageHandler handler;
   MessageHandlerTestPeer handler_peer(&handler);
   Message* message1 = new Message(1, NULL, 0, Message::kNormalPriority);
@@ skipping 147 matching lines @@
   EXPECT_EQ(port, handler_ports[0]);
   for (int i = 1; i < 11; i++) {
     EXPECT_EQ(ports[i - 1], handler_ports[i]);
   }
   handler_peer.decrement_live_ports();
   EXPECT(!handler.HasLivePorts());
   PortMap::ClosePorts(&handler);
 }
 
 }  // namespace dart