EDK: Check that handle rights are preserved in various tests.

mojo/edk/system/data_pipe_impl_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file contains tests that are shared between different implementations of
 // |DataPipeImpl|.
 
 #include "mojo/edk/system/data_pipe_impl.h"
 
 #include <stdint.h>
@@ skipping 298 matching lines @@
     ASSERT_EQ(MOJO_RESULT_OK,
               message_pipe(dest_i)->ReadMessage(
                   0, UserPointer<void>(read_buffer),
                   MakeUserPointer(&read_buffer_size), &read_handles,
                   &read_num_handles, MOJO_READ_MESSAGE_FLAG_NONE));
     EXPECT_EQ(0u, static_cast<size_t>(read_buffer_size));
     ASSERT_EQ(1u, read_handles.size());
     ASSERT_EQ(1u, read_num_handles);
     ASSERT_TRUE(read_handles[0]);
     EXPECT_TRUE(read_handles[0].dispatcher->HasOneRef());
-    // TODO(vtl): Also check the rights here once they're actually preserved?
+    EXPECT_EQ(handle_to_send.rights, read_handles[0].rights);
 
     *handle_to_receive = std::move(read_handles[0]);
   }
 
   RefPtr<MessagePipe> message_pipe(size_t i) { return message_pipes_[i]; }
   RefPtr<DataPipe> dp() { return dp_; }
 
  private:
   void EnsureMessagePipeClosed(size_t i) {
     if (!message_pipes_[i])
@@ skipping 2615 matching lines @@
                 &waiter, MOJO_HANDLE_SIGNAL_READ_THRESHOLD, 0, &hss));
   EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfied_signals);
   EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfiable_signals);
 
   this->ConsumerClose();
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo