Refactor net tests to use GMock matchers for checking net::Error results

net/dns/dns_transaction_unittest.cc

 // Copyright (c) 2012 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/dns/dns_transaction.h"
 
 #include <stdint.h>
 
 #include <limits>
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/rand_util.h"
 #include "base/run_loop.h"
 #include "base/sys_byteorder.h"
 #include "base/test/test_timeouts.h"
 #include "net/base/ip_address.h"
 #include "net/dns/dns_protocol.h"
 #include "net/dns/dns_query.h"
 #include "net/dns/dns_response.h"
 #include "net/dns/dns_session.h"
 #include "net/dns/dns_test_util.h"
 #include "net/dns/dns_util.h"
 #include "net/log/net_log.h"
 #include "net/socket/socket_test_util.h"
+#include "net/test/gtest_util.h"
+#include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using net::test::IsOk;
+
 namespace net {
 
 namespace {
 
 std::string DomainFromDot(const base::StringPiece& dotted) {
   std::string out;
   EXPECT_TRUE(DNSDomainFromDot(dotted, &out));
   return out;
 }
 
@@ skipping 233 matching lines @@
     if (cancel_in_callback_) {
       Cancel();
       return;
     }
 
     // Tell MessageLoop to quit now, in case any ASSERT_* fails.
     if (quit_in_callback_)
       base::MessageLoop::current()->QuitWhenIdle();
 
     if (expected_answer_count_ >= 0) {
-      ASSERT_EQ(OK, rv);
+      ASSERT_THAT(rv, IsOk());
       ASSERT_TRUE(response != NULL);
       EXPECT_EQ(static_cast<unsigned>(expected_answer_count_),
                 response->answer_count());
       EXPECT_EQ(qtype_, response->qtype());
 
       DnsRecordParser parser = response->Parser();
       DnsResourceRecord record;
       for (int i = 0; i < expected_answer_count_; ++i) {
         EXPECT_TRUE(parser.ReadRecord(&record));
       }
@@ skipping 699 matching lines @@
   config_.timeout = TestTimeouts::tiny_timeout();
   ConfigureFactory();
 
   TransactionHelper helper0(".", dns_protocol::kTypeA, ERR_INVALID_ARGUMENT);
   EXPECT_TRUE(helper0.Run(transaction_factory_.get()));
 }
 
 }  // namespace
 
 }  // namespace net