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112 lines
2.9 KiB
112 lines
2.9 KiB
/*
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* Copyright 2019 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "api/scoped_refptr.h"
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#include <utility>
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#include <vector>
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#include "test/gtest.h"
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namespace rtc {
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namespace {
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struct FunctionsCalled {
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int addref = 0;
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int release = 0;
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};
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class ScopedRefCounted {
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public:
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explicit ScopedRefCounted(FunctionsCalled* called) : called_(*called) {}
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ScopedRefCounted(const ScopedRefCounted&) = delete;
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ScopedRefCounted& operator=(const ScopedRefCounted&) = delete;
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void AddRef() {
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++called_.addref;
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++ref_count_;
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}
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void Release() {
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++called_.release;
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if (0 == --ref_count_)
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delete this;
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}
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private:
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~ScopedRefCounted() = default;
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FunctionsCalled& called_;
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int ref_count_ = 0;
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};
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TEST(ScopedRefptrTest, IsCopyConstructable) {
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FunctionsCalled called;
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scoped_refptr<ScopedRefCounted> ptr = new ScopedRefCounted(&called);
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scoped_refptr<ScopedRefCounted> another_ptr = ptr;
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EXPECT_TRUE(ptr);
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EXPECT_TRUE(another_ptr);
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EXPECT_EQ(called.addref, 2);
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}
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TEST(ScopedRefptrTest, IsCopyAssignable) {
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FunctionsCalled called;
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scoped_refptr<ScopedRefCounted> another_ptr;
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scoped_refptr<ScopedRefCounted> ptr = new ScopedRefCounted(&called);
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another_ptr = ptr;
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EXPECT_TRUE(ptr);
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EXPECT_TRUE(another_ptr);
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EXPECT_EQ(called.addref, 2);
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}
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TEST(ScopedRefptrTest, IsMoveConstructableWithoutExtraAddRefRelease) {
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FunctionsCalled called;
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scoped_refptr<ScopedRefCounted> ptr = new ScopedRefCounted(&called);
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scoped_refptr<ScopedRefCounted> another_ptr = std::move(ptr);
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EXPECT_FALSE(ptr);
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EXPECT_TRUE(another_ptr);
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EXPECT_EQ(called.addref, 1);
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EXPECT_EQ(called.release, 0);
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}
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TEST(ScopedRefptrTest, IsMoveAssignableWithoutExtraAddRefRelease) {
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FunctionsCalled called;
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scoped_refptr<ScopedRefCounted> another_ptr;
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scoped_refptr<ScopedRefCounted> ptr = new ScopedRefCounted(&called);
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another_ptr = std::move(ptr);
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EXPECT_FALSE(ptr);
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EXPECT_TRUE(another_ptr);
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EXPECT_EQ(called.addref, 1);
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EXPECT_EQ(called.release, 0);
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}
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TEST(ScopedRefptrTest, MovableDuringVectorReallocation) {
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static_assert(
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std::is_nothrow_move_constructible<scoped_refptr<ScopedRefCounted>>(),
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"");
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// Test below describes a scenario where it is helpful for move constructor
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// to be noexcept.
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FunctionsCalled called;
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std::vector<scoped_refptr<ScopedRefCounted>> ptrs;
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ptrs.reserve(1);
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// Insert more elements than reserved to provoke reallocation.
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ptrs.push_back(new ScopedRefCounted(&called));
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ptrs.push_back(new ScopedRefCounted(&called));
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EXPECT_EQ(called.addref, 2);
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EXPECT_EQ(called.release, 0);
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}
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} // namespace
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} // namespace rtc
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