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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/performance_manager/owned_objects.h"
#include "base/memory/ptr_util.h"
#include "base/test/gtest_util.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace performance_manager {
namespace {
class Owned {
public:
Owned() = default;
virtual ~Owned() { OnDestructor(); }
Owned(const Owned&) = delete;
Owned& operator=(const Owned) = delete;
MOCK_METHOD(void, OnPassedTo, (void*));
MOCK_METHOD(void, OnTakenFrom, (void*));
MOCK_METHOD(void, OnDestructor, ());
};
} // namespace
TEST(OwnedObjectsTest, ContainerWorksAsAdvertised) {
using Owner =
OwnedObjects<Owned, void*, &Owned::OnPassedTo, &Owned::OnTakenFrom>;
std::unique_ptr<Owner> owner = std::make_unique<Owner>();
std::unique_ptr<Owned> owned1 = std::make_unique<Owned>();
std::unique_ptr<Owned> owned2 = std::make_unique<Owned>();
auto* raw1 = owned1.get();
auto* raw2 = owned2.get();
// Pass both objects to the owner.
EXPECT_EQ(0u, owner->size());
EXPECT_CALL(*raw1, OnPassedTo(owner.get()));
owner->PassObject(std::move(owned1), owner.get());
EXPECT_EQ(1u, owner->size());
EXPECT_CALL(*raw2, OnPassedTo(owner.get()));
owner->PassObject(std::move(owned2), owner.get());
EXPECT_EQ(2u, owner->size());
// Take one back.
EXPECT_CALL(*raw1, OnTakenFrom(owner.get()));
owned1 = owner->TakeObject(raw1, owner.get());
EXPECT_EQ(1u, owner->size());
// Destroy that object and expect its destructor to have been invoked.
EXPECT_CALL(*raw1, OnDestructor());
owned1.reset();
raw1 = nullptr;
// Expect the container to explode if deleted with objects.
EXPECT_CHECK_DEATH(owner.reset());
// Ask the container to release the remaining objects.
EXPECT_CALL(*raw2, OnTakenFrom(owner.get()));
EXPECT_CALL(*raw2, OnDestructor());
owner->ReleaseObjects(owner.get());
raw2 = nullptr;
// Destroying the container is now safe.
owner.reset();
}
} // namespace performance_manager
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