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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <AK/NonnullRefPtr.h>
#include <AK/String.h>
struct Object : public RefCounted<Object> {
int x;
};
struct Object2 : Object {
};
struct SelfAwareObject : public RefCounted<SelfAwareObject> {
void one_ref_left() { m_has_one_ref_left = true; }
void will_be_destroyed() { ++num_destroyed; }
bool m_has_one_ref_left = false;
static size_t num_destroyed;
};
size_t SelfAwareObject::num_destroyed = 0;
TEST_CASE(basics)
{
RefPtr<Object> object = adopt_ref(*new Object);
EXPECT(object.ptr() != nullptr);
EXPECT_EQ(object->ref_count(), 1u);
object->ref();
EXPECT_EQ(object->ref_count(), 2u);
object->unref();
EXPECT_EQ(object->ref_count(), 1u);
{
NonnullRefPtr another = *object;
EXPECT_EQ(object->ref_count(), 2u);
}
EXPECT_EQ(object->ref_count(), 1u);
}
TEST_CASE(assign_reference)
{
RefPtr<Object> object = adopt_ref(*new Object);
EXPECT_EQ(object->ref_count(), 1u);
object = *object;
EXPECT_EQ(object->ref_count(), 1u);
}
TEST_CASE(assign_ptr)
{
RefPtr<Object> object = adopt_ref(*new Object);
EXPECT_EQ(object->ref_count(), 1u);
object = object.ptr();
EXPECT_EQ(object->ref_count(), 1u);
}
TEST_CASE(copy_move_ref)
{
RefPtr<Object2> object = adopt_ref(*new Object2);
EXPECT_EQ(object->ref_count(), 1u);
{
auto object2 = object;
EXPECT_EQ(object->ref_count(), 2u);
RefPtr<Object> object1 = object;
EXPECT_EQ(object->ref_count(), 3u);
object1 = move(object2);
EXPECT_EQ(object->ref_count(), 2u);
RefPtr<Object> object3(move(object1));
EXPECT_EQ(object3->ref_count(), 2u);
object1 = object3;
EXPECT_EQ(object3->ref_count(), 3u);
}
EXPECT_EQ(object->ref_count(), 1u);
}
TEST_CASE(swap)
{
RefPtr<Object> object_a = adopt_ref(*new Object);
RefPtr<Object> object_b = adopt_ref(*new Object);
auto* ptr_a = object_a.ptr();
auto* ptr_b = object_b.ptr();
swap(object_a, object_b);
EXPECT_EQ(object_a, ptr_b);
EXPECT_EQ(object_b, ptr_a);
EXPECT_EQ(object_a->ref_count(), 1u);
EXPECT_EQ(object_b->ref_count(), 1u);
}
TEST_CASE(assign_moved_self)
{
RefPtr<Object> object = adopt_ref(*new Object);
EXPECT_EQ(object->ref_count(), 1u);
#ifdef __clang__
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wself-move"
#endif
object = move(object);
#ifdef __clang__
# pragma clang diagnostic pop
#endif
EXPECT_EQ(object->ref_count(), 1u);
}
TEST_CASE(assign_copy_self)
{
RefPtr<Object> object = adopt_ref(*new Object);
EXPECT_EQ(object->ref_count(), 1u);
#ifdef __clang__
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wself-assign-overloaded"
#endif
object = object;
#ifdef __clang__
# pragma clang diagnostic pop
#endif
EXPECT_EQ(object->ref_count(), 1u);
}
TEST_CASE(self_observers)
{
{
RefPtr<SelfAwareObject> object = adopt_ref(*new SelfAwareObject);
EXPECT_EQ(object->ref_count(), 1u);
EXPECT_EQ(object->m_has_one_ref_left, false);
EXPECT_EQ(SelfAwareObject::num_destroyed, 0u);
object->ref();
EXPECT_EQ(object->ref_count(), 2u);
EXPECT_EQ(object->m_has_one_ref_left, false);
EXPECT_EQ(SelfAwareObject::num_destroyed, 0u);
object->unref();
EXPECT_EQ(object->ref_count(), 1u);
EXPECT_EQ(object->m_has_one_ref_left, true);
EXPECT_EQ(SelfAwareObject::num_destroyed, 0u);
}
EXPECT_EQ(SelfAwareObject::num_destroyed, 1u);
}
TEST_CASE(adopt_ref_if_nonnull)
{
RefPtr<SelfAwareObject> object = adopt_ref_if_nonnull(new SelfAwareObject);
EXPECT_EQ(object.is_null(), false);
EXPECT_EQ(object->ref_count(), 1u);
SelfAwareObject* null_object = nullptr;
RefPtr<SelfAwareObject> failed_allocation = adopt_ref_if_nonnull(null_object);
EXPECT_EQ(failed_allocation.is_null(), true);
}
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