Update from https://crrev.com/308331

base/ios/weak_nsobject_unittest.mm

Index: base/ios/weak_nsobject_unittest.mm
diff --git a/base/ios/weak_nsobject_unittest.mm b/base/ios/weak_nsobject_unittest.mm
new file mode 100644
index 0000000000000000000000000000000000000000..9758aedfc26ac258856f3d5ab973b602eee8bdfa
--- /dev/null
+++ b/base/ios/weak_nsobject_unittest.mm
@@ -0,0 +1,97 @@
+// Copyright 2013 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 "base/basictypes.h"
+#include "base/ios/weak_nsobject.h"
+#include "base/mac/scoped_nsobject.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using base::WeakNSObject;
+
+namespace {
+
+TEST(WeakNSObjectTest, WeakNSObject) {
+  base::scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
+  WeakNSObject<NSObject> w1(p1);
+  EXPECT_TRUE(w1);
+  p1.reset();
+  EXPECT_FALSE(w1);
+}
+
+TEST(WeakNSObjectTest, MultipleWeakNSObject) {
+  base::scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
+  WeakNSObject<NSObject> w1(p1);
+  WeakNSObject<NSObject> w2(w1);
+  EXPECT_TRUE(w1);
+  EXPECT_TRUE(w2);
+  EXPECT_TRUE(w1.get() == w2.get());
+  p1.reset();
+  EXPECT_FALSE(w1);
+  EXPECT_FALSE(w2);
+}
+
+TEST(WeakNSObjectTest, WeakNSObjectDies) {
+  base::scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
+  {
+    WeakNSObject<NSObject> w1(p1);
+    EXPECT_TRUE(w1);
+  }
+}
+
+TEST(WeakNSObjectTest, WeakNSObjectReset) {
+  base::scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
+  WeakNSObject<NSObject> w1(p1);
+  EXPECT_TRUE(w1);
+  w1.reset();
+  EXPECT_FALSE(w1);
+  EXPECT_TRUE(p1);
+  EXPECT_TRUE([p1 description]);
+}
+
+TEST(WeakNSObjectTest, WeakNSObjectResetWithObject) {
+  base::scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
+  base::scoped_nsobject<NSObject> p2([[NSObject alloc] init]);
+  WeakNSObject<NSObject> w1(p1);
+  EXPECT_TRUE(w1);
+  w1.reset(p2);
+  EXPECT_TRUE(w1);
+  EXPECT_TRUE([p1 description]);
+  EXPECT_TRUE([p2 description]);
+}
+
+TEST(WeakNSObjectTest, WeakNSObjectEmpty) {
+  base::scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
+  WeakNSObject<NSObject> w1;
+  EXPECT_FALSE(w1);
+  w1.reset(p1);
+  EXPECT_TRUE(w1);
+  p1.reset();
+  EXPECT_FALSE(w1);
+}
+
+TEST(WeakNSObjectTest, WeakNSObjectCopy) {
+  base::scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
+  WeakNSObject<NSObject> w1(p1);
+  WeakNSObject<NSObject> w2(w1);
+  EXPECT_TRUE(w1);
+  EXPECT_TRUE(w2);
+  p1.reset();
+  EXPECT_FALSE(w1);
+  EXPECT_FALSE(w2);
+}
+
+TEST(WeakNSObjectTest, WeakNSObjectAssignment) {
+  base::scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
+  WeakNSObject<NSObject> w1(p1);
+  WeakNSObject<NSObject> w2;
+  EXPECT_FALSE(w2);
+  w2 = w1;
+  EXPECT_TRUE(w1);
+  EXPECT_TRUE(w2);
+  p1.reset();
+  EXPECT_FALSE(w1);
+  EXPECT_FALSE(w2);
+}
+
+}  // namespace