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

net/socket/unix_domain_server_socket_posix_unittest.cc

Index: net/socket/unix_domain_server_socket_posix_unittest.cc
diff --git a/net/socket/unix_domain_server_socket_posix_unittest.cc b/net/socket/unix_domain_server_socket_posix_unittest.cc
index f44e544e7618879b8b65cbba8e81badb5865bd7b..035aca1e48993ed06071c65267e8a595bc922ca5 100644
--- a/net/socket/unix_domain_server_socket_posix_unittest.cc
+++ b/net/socket/unix_domain_server_socket_posix_unittest.cc
@@ -16,8 +16,13 @@
 #include "net/base/net_errors.h"
 #include "net/base/test_completion_callback.h"
 #include "net/socket/unix_domain_client_socket_posix.h"
+#include "net/test/gtest_util.h"
+#include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using net::test::IsError;
+using net::test::IsOk;
+
 namespace net {
 namespace {
 
@@ -63,7 +68,8 @@ TEST_F(UnixDomainServerSocketTest, ListenWithInvalidPathWithAbstractNamespace) {
   UnixDomainServerSocket server_socket(CreateAuthCallback(true),
                                        kUseAbstractNamespace);
 #if defined(OS_ANDROID) || defined(OS_LINUX)
-  EXPECT_EQ(OK, server_socket.BindAndListen(kInvalidSocketPath, /*backlog=*/1));
+  EXPECT_THAT(server_socket.BindAndListen(kInvalidSocketPath, /*backlog=*/1),
+              IsOk());
 #else
   EXPECT_EQ(ERR_ADDRESS_INVALID,
             server_socket.BindAndListen(kInvalidSocketPath, /*backlog=*/1));
@@ -76,7 +82,7 @@ TEST_F(UnixDomainServerSocketTest, ListenAgainAfterFailureWithInvalidPath) {
                                        kUseAbstractNamespace);
   EXPECT_EQ(ERR_FILE_NOT_FOUND,
             server_socket.BindAndListen(kInvalidSocketPath, /*backlog=*/1));
-  EXPECT_EQ(OK, server_socket.BindAndListen(socket_path_, /*backlog=*/1));
+  EXPECT_THAT(server_socket.BindAndListen(socket_path_, /*backlog=*/1), IsOk());
 }
 
 TEST_F(UnixDomainServerSocketTest, AcceptWithForbiddenUser) {
@@ -84,7 +90,7 @@ TEST_F(UnixDomainServerSocketTest, AcceptWithForbiddenUser) {
 
   UnixDomainServerSocket server_socket(CreateAuthCallback(false),
                                        kUseAbstractNamespace);
-  EXPECT_EQ(OK, server_socket.BindAndListen(socket_path_, /*backlog=*/1));
+  EXPECT_THAT(server_socket.BindAndListen(socket_path_, /*backlog=*/1), IsOk());
 
   std::unique_ptr<StreamSocket> accepted_socket;
   TestCompletionCallback accept_callback;
@@ -99,7 +105,7 @@ TEST_F(UnixDomainServerSocketTest, AcceptWithForbiddenUser) {
   TestCompletionCallback connect_callback;
   int rv = connect_callback.GetResult(
       client_socket.Connect(connect_callback.callback()));
-  ASSERT_EQ(OK, rv);
+  ASSERT_THAT(rv, IsOk());
 
   // Try to read from the socket.
   const int read_buffer_size = 10;
@@ -124,13 +130,13 @@ TEST_F(UnixDomainServerSocketTest, UnimplementedMethodsFail) {
                                        kUseAbstractNamespace);
 
   IPEndPoint ep;
-  EXPECT_EQ(ERR_NOT_IMPLEMENTED, server_socket.Listen(ep, 0));
+  EXPECT_THAT(server_socket.Listen(ep, 0), IsError(ERR_NOT_IMPLEMENTED));
   EXPECT_EQ(ERR_NOT_IMPLEMENTED,
       server_socket.ListenWithAddressAndPort(kInvalidSocketPath,
                                              0,
                                              /*backlog=*/1));
 
-  EXPECT_EQ(ERR_ADDRESS_INVALID, server_socket.GetLocalAddress(&ep));
+  EXPECT_THAT(server_socket.GetLocalAddress(&ep), IsError(ERR_ADDRESS_INVALID));
 }
 
 // Normal cases including read/write are tested by UnixDomainClientSocketTest.