Change RefCountedObject to use perfect forwarding.

webrtc/base/refcountedobject_unittest.cc

+/*
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <string>
+
+#include "webrtc/base/gunit.h"
+#include "webrtc/base/refcount.h"
+
+namespace rtc {
+
+namespace {
+
+class A {
+ public:
+  A() {}
+
+ private:
+  RTC_DISALLOW_COPY_AND_ASSIGN(A);
+};
+
+class RefClass : public RefCountInterface {
+ public:
+  RefClass() {}
+
+ protected:
+  virtual ~RefClass() {}
+};
+
+class RefClassWithRvalue : public RefCountInterface {
+ public:
+  explicit RefClassWithRvalue(std::unique_ptr<A> a) : a_(std::move(a)) {}
+
+ protected:
+  virtual ~RefClassWithRvalue() {}
+
+ public:
+  std::unique_ptr<A> a_;
+};
+
+class RefClassWithMixedValues : public RefCountInterface {
+ public:
+  RefClassWithMixedValues(std::unique_ptr<A> a, int b, const std::string& c)
+      : a_(std::move(a)), b_(b), c_(c) {}
+
+ protected:
+  virtual ~RefClassWithMixedValues() {}
+
+ public:
+  std::unique_ptr<A> a_;
+  int b_;
+  std::string c_;
+};
+
+}  // namespace
+
+TEST(RefCountedObject, Basic) {
+  scoped_refptr<RefCountedObject<RefClass>> aref(
+      new RefCountedObject<RefClass>());
+  EXPECT_TRUE(aref->HasOneRef());
+  EXPECT_EQ(2, aref->AddRef());
+  EXPECT_EQ(1, aref->Release());
+}
+
+TEST(RefCountedObject, SupportRValuesInCtor) {
+  std::unique_ptr<A> a(new A());
+  scoped_refptr<RefClassWithRvalue> ref(
+      new RefCountedObject<RefClassWithRvalue>(std::move(a)));
+  EXPECT_TRUE(ref->a_.get() != nullptr);
+  EXPECT_TRUE(a.get() == nullptr);
+}
+
+TEST(RefCountedObject, SupportMixedTypesInCtor) {
+  std::unique_ptr<A> a(new A());
+  int b = 9;
+  std::string c = "hello";
+  scoped_refptr<RefClassWithMixedValues> ref(
+      new RefCountedObject<RefClassWithMixedValues>(std::move(a), b, c));
+  EXPECT_TRUE(ref->a_.get() != nullptr);
+  EXPECT_TRUE(a.get() == nullptr);
+  EXPECT_EQ(b, ref->b_);
+  EXPECT_EQ(c, ref->c_);
+}
+
+}  // namespace rtc