Update scoped_nsobject to be copyable.

base/memory/scoped_nsobject_unittest.mm

+// 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 <vector>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_nsobject.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+TEST(ScopedNSObjectTest, ScopedNSObject) {
+  scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
+  ASSERT_TRUE(p1.get());
+  ASSERT_EQ(1u, [p1 retainCount]);
+  scoped_nsobject<NSObject> p2(p1);
+  ASSERT_EQ(p1.get(), p2.get());
+  ASSERT_EQ(2u, [p1 retainCount]);
+  p2.reset();
+  ASSERT_EQ(nil, p2.get());
+  ASSERT_EQ(1u, [p1 retainCount]);
+  {
+    scoped_nsobject<NSObject> p3 = p1;
+    ASSERT_EQ(p1.get(), p3.get());
+    ASSERT_EQ(2u, [p1 retainCount]);
+    p3 = p1;
+    ASSERT_EQ(p1.get(), p3.get());
+    ASSERT_EQ(2u, [p1 retainCount]);
+  }
+  ASSERT_EQ(1u, [p1 retainCount]);
+  scoped_nsobject<NSObject> p4(p1.get(), scoped_policy::RETAIN);
+  ASSERT_EQ(2u, [p1 retainCount]);
+}
+
+TEST(ScopedNSObjectTest, ScopedNSObjectInContainer) {
+  scoped_nsobject<id> p([[NSObject alloc] init]);
+  ASSERT_TRUE(p.get());
+  ASSERT_EQ(1u, [p retainCount]);
+  {
+    std::vector<scoped_nsobject<id> > objects;
+    objects.push_back(p);
+    ASSERT_EQ(2u, [p retainCount]);
+    ASSERT_EQ(p.get(), objects[0].get());
+    objects.push_back(scoped_nsobject<id>([[NSObject alloc] init]));
+    ASSERT_TRUE(objects[1].get());
+    ASSERT_EQ(1u, [objects[1] retainCount]);
+  }
+  ASSERT_EQ(1u, [p retainCount]);
+}
+
+TEST(ScopedNSObjectTest, ScopedNSObjectFreeFunctions) {
+  scoped_nsobject<id> p1([[NSObject alloc] init]);
+  id o1 = p1.get();
+  ASSERT_TRUE(o1 == p1);
+  ASSERT_FALSE(o1 != p1);
+  scoped_nsobject<id> p2([[NSObject alloc] init]);
+  ASSERT_TRUE(o1 != p2);
+  ASSERT_FALSE(o1 == p2);
+  id o2 = p2.get();
+  swap(p1, p2);
+  ASSERT_EQ(o2, p1.get());
+  ASSERT_EQ(o1, p2.get());
+}
+
+}  // namespace