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// 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 "base/memory/weak_ptr.h"
#include <memory>
#include <string>
#include <gtest/gtest.h>
#include "base/bind.h"
#include "base/location.h"
namespace base {
namespace {
WeakPtr<int> PassThru(WeakPtr<int> ptr) {
return ptr;
}
struct Base {
std::string member;
};
struct Derived : public Base {};
struct TargetBase {};
struct Target : public TargetBase, public SupportsWeakPtr<Target> {
virtual ~Target() {}
};
struct DerivedTarget : public Target {};
struct Arrow {
WeakPtr<Target> target;
};
struct TargetWithFactory : public Target {
TargetWithFactory() : factory(this) {}
WeakPtrFactory<Target> factory;
};
} // namespace
TEST(WeakPtrFactoryTest, Basic) {
int data;
WeakPtrFactory<int> factory(&data);
WeakPtr<int> ptr = factory.GetWeakPtr();
EXPECT_EQ(&data, ptr.get());
}
TEST(WeakPtrFactoryTest, Comparison) {
int data;
WeakPtrFactory<int> factory(&data);
WeakPtr<int> ptr = factory.GetWeakPtr();
WeakPtr<int> ptr2 = ptr;
EXPECT_EQ(ptr.get(), ptr2.get());
}
TEST(WeakPtrFactoryTest, Move) {
int data;
WeakPtrFactory<int> factory(&data);
WeakPtr<int> ptr = factory.GetWeakPtr();
WeakPtr<int> ptr2 = factory.GetWeakPtr();
WeakPtr<int> ptr3 = std::move(ptr2);
EXPECT_NE(ptr.get(), ptr2.get());
EXPECT_EQ(ptr.get(), ptr3.get());
}
TEST(WeakPtrFactoryTest, OutOfScope) {
WeakPtr<int> ptr;
EXPECT_EQ(nullptr, ptr.get());
{
int data;
WeakPtrFactory<int> factory(&data);
ptr = factory.GetWeakPtr();
}
EXPECT_EQ(nullptr, ptr.get());
}
TEST(WeakPtrFactoryTest, Multiple) {
WeakPtr<int> a, b;
{
int data;
WeakPtrFactory<int> factory(&data);
a = factory.GetWeakPtr();
b = factory.GetWeakPtr();
EXPECT_EQ(&data, a.get());
EXPECT_EQ(&data, b.get());
}
EXPECT_EQ(nullptr, a.get());
EXPECT_EQ(nullptr, b.get());
}
TEST(WeakPtrFactoryTest, MultipleStaged) {
WeakPtr<int> a;
{
int data;
WeakPtrFactory<int> factory(&data);
a = factory.GetWeakPtr();
{
WeakPtr<int> b = factory.GetWeakPtr();
}
EXPECT_NE(nullptr, a.get());
}
EXPECT_EQ(nullptr, a.get());
}
TEST(WeakPtrFactoryTest, Dereference) {
Base data;
data.member = "123456";
WeakPtrFactory<Base> factory(&data);
WeakPtr<Base> ptr = factory.GetWeakPtr();
EXPECT_EQ(&data, ptr.get());
EXPECT_EQ(data.member, (*ptr).member);
EXPECT_EQ(data.member, ptr->member);
}
TEST(WeakPtrFactoryTest, UpCast) {
Derived data;
WeakPtrFactory<Derived> factory(&data);
WeakPtr<Base> ptr = factory.GetWeakPtr();
ptr = factory.GetWeakPtr();
EXPECT_EQ(ptr.get(), &data);
}
TEST(WeakPtrTest, ConstructFromNullptr) {
WeakPtr<int> ptr = PassThru(nullptr);
EXPECT_EQ(nullptr, ptr.get());
}
TEST(WeakPtrTest, SupportsWeakPtr) {
Target target;
WeakPtr<Target> ptr = target.AsWeakPtr();
EXPECT_EQ(&target, ptr.get());
}
TEST(WeakPtrTest, DerivedTarget) {
DerivedTarget target;
WeakPtr<DerivedTarget> ptr = AsWeakPtr(&target);
EXPECT_EQ(&target, ptr.get());
}
TEST(WeakPtrFactoryTest, BooleanTesting) {
int data;
WeakPtrFactory<int> factory(&data);
WeakPtr<int> ptr_to_an_instance = factory.GetWeakPtr();
EXPECT_TRUE(ptr_to_an_instance);
EXPECT_FALSE(!ptr_to_an_instance);
if (ptr_to_an_instance) {
} else {
ADD_FAILURE() << "Pointer to an instance should result in true.";
}
if (!ptr_to_an_instance) { // check for operator!().
ADD_FAILURE() << "Pointer to an instance should result in !x being false.";
}
WeakPtr<int> null_ptr;
EXPECT_FALSE(null_ptr);
EXPECT_TRUE(!null_ptr);
if (null_ptr) {
ADD_FAILURE() << "Null pointer should result in false.";
}
if (!null_ptr) { // check for operator!().
} else {
ADD_FAILURE() << "Null pointer should result in !x being true.";
}
}
TEST(WeakPtrFactoryTest, ComparisonToNull) {
int data;
WeakPtrFactory<int> factory(&data);
WeakPtr<int> ptr_to_an_instance = factory.GetWeakPtr();
EXPECT_NE(nullptr, ptr_to_an_instance);
EXPECT_NE(ptr_to_an_instance, nullptr);
WeakPtr<int> null_ptr;
EXPECT_EQ(null_ptr, nullptr);
EXPECT_EQ(nullptr, null_ptr);
}
TEST(WeakPtrTest, InvalidateWeakPtrs) {
int data;
WeakPtrFactory<int> factory(&data);
WeakPtr<int> ptr = factory.GetWeakPtr();
EXPECT_EQ(&data, ptr.get());
EXPECT_TRUE(factory.HasWeakPtrs());
factory.InvalidateWeakPtrs();
EXPECT_EQ(nullptr, ptr.get());
EXPECT_FALSE(factory.HasWeakPtrs());
// Test that the factory can create new weak pointers after a
// InvalidateWeakPtrs call, and they remain valid until the next
// InvalidateWeakPtrs call.
WeakPtr<int> ptr2 = factory.GetWeakPtr();
EXPECT_EQ(&data, ptr2.get());
EXPECT_TRUE(factory.HasWeakPtrs());
factory.InvalidateWeakPtrs();
EXPECT_EQ(nullptr, ptr2.get());
EXPECT_FALSE(factory.HasWeakPtrs());
}
TEST(WeakPtrTest, HasWeakPtrs) {
int data;
WeakPtrFactory<int> factory(&data);
{
WeakPtr<int> ptr = factory.GetWeakPtr();
EXPECT_TRUE(factory.HasWeakPtrs());
}
EXPECT_FALSE(factory.HasWeakPtrs());
}
} // namespace base
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