This adds adds four macros when compiling using GTEST_OS_MAC:

testing/gtest_mac_unittest.mm

Index: testing/gtest_mac_unittest.mm
diff --git a/testing/gtest_mac_unittest.mm b/testing/gtest_mac_unittest.mm
new file mode 100644
index 0000000000000000000000000000000000000000..552beeebca9c242edcebeacec18763c42c1fd450
--- /dev/null
+++ b/testing/gtest_mac_unittest.mm
@@ -0,0 +1,47 @@
+// Copyright (c) 2010 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.
+
+// Note that while this file is in testing/ and tests GTest macros, it is built
+// as part of Chromium's unit_tests target because the project does not build
+// or run GTest's internal test suite.
+
+#import "testing/gtest_mac.h"
+
+#import <Foundation/Foundation.h>
+
+#include "base/scoped_nsautorelease_pool.h"
+#include "testing/gtest/include/gtest/internal/gtest-port.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(GTestMac, ExpectNSEQ) {
+  base::ScopedNSAutoreleasePool pool;
+
+  EXPECT_NSEQ(@"a", @"a");
+
+  NSString* s1 = [NSString stringWithUTF8String:"a"];
+  NSString* s2 = [NSString stringWithString:@"a"];
+  EXPECT_NE(s1, s2);
+  EXPECT_NSEQ(s1, s2);
+}
+
+TEST(GTestMac, AssertNSEQ) {
+  base::ScopedNSAutoreleasePool pool;
+
+  NSNumber* n1 = [NSNumber numberWithInt:42];
+  NSNumber* n2 = [NSNumber numberWithInt:42];
+  EXPECT_NE(n1, n2);

[Avi (use Gerrit), 2010/08/05 23:51:15]

Is this a valid assumption?

+  ASSERT_NSEQ(n1, n2);
+}
+
+TEST(GTestMac, ExpectNSNE) {
+  base::ScopedNSAutoreleasePool pool;
+
+  EXPECT_NSNE([NSNumber numberWithInt:2], [NSNumber numberWithInt:42]);
+}
+
+TEST(GTestMac, AssertNSNE) {
+  base::ScopedNSAutoreleasePool pool;
+
+  ASSERT_NSNE(@"a", @"b");
+}