Ensure that BidirectionalStreamQuicImpl does not synchronously invoke callbacks

net/quic/chromium/bidirectional_stream_quic_impl_unittest.cc

 // Copyright 2016 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.
 
 #include "net/quic/chromium/bidirectional_stream_quic_impl.h"
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/memory/ptr_util.h"
@@ skipping 145 matching lines @@
     CHECK_NE(OK, error);
 
     on_failed_called_ = true;
     error_ = error;
     loop_->Quit();
   }
 
   void Start(const BidirectionalStreamRequestInfo* request_info,
              const NetLogWithSource& net_log,
              std::unique_ptr<QuicChromiumClientSession::Handle> session) {
+    not_expect_callback_ = true;
     stream_ = base::MakeUnique<BidirectionalStreamQuicImpl>(std::move(session));
     stream_->Start(request_info, net_log, send_request_headers_automatically_,
                    this, nullptr);
+    not_expect_callback_ = false;
   }
 
-  void SendRequestHeaders() { stream_->SendRequestHeaders(); }
+  void SendRequestHeaders() {
+    not_expect_callback_ = true;
+    stream_->SendRequestHeaders();
+    not_expect_callback_ = false;
+  }
 
   void SendData(const scoped_refptr<IOBuffer>& data,
                 int length,
                 bool end_of_stream) {
     SendvData({data}, {length}, end_of_stream);
   }
 
   void SendvData(const std::vector<scoped_refptr<IOBuffer>>& data,
                  const std::vector<int>& lengths,
                  bool end_of_stream) {
@@ skipping 1928 matching lines @@
 
   base::RunLoop().RunUntilIdle();
 
   EXPECT_EQ(1, delegate->on_data_read_count());
   EXPECT_EQ(0, delegate->on_data_sent_count());
 }
 
 }  // namespace test
 
 }  // namespace net