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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/memory/values_equivalent.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_refptr.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
TEST(ValuesEquivalentTest, Comparisons) {
int a = 1234;
int b1 = 5678;
int b2 = 5678;
EXPECT_TRUE(ValuesEquivalent<int>(nullptr, nullptr));
EXPECT_FALSE(ValuesEquivalent<int>(&a, nullptr));
EXPECT_FALSE(ValuesEquivalent<int>(nullptr, &a));
EXPECT_FALSE(ValuesEquivalent(&a, &b1));
EXPECT_TRUE(ValuesEquivalent(&a, &a));
EXPECT_TRUE(ValuesEquivalent(&b1, &b2));
}
TEST(ValuesEquivalentTest, UniquePtr) {
auto a = std::make_unique<int>(1234);
auto b1 = std::make_unique<int>(5678);
auto b2 = std::make_unique<int>(5678);
EXPECT_TRUE(ValuesEquivalent(std::unique_ptr<int>(), std::unique_ptr<int>()));
EXPECT_FALSE(ValuesEquivalent(a, std::unique_ptr<int>()));
EXPECT_FALSE(ValuesEquivalent(std::unique_ptr<int>(), a));
EXPECT_FALSE(ValuesEquivalent(a, b1));
EXPECT_TRUE(ValuesEquivalent(a, a));
EXPECT_TRUE(ValuesEquivalent(b1, b2));
}
TEST(ValuesEquivalentTest, ScopedRefPtr) {
struct Wrapper : public RefCounted<Wrapper> {
explicit Wrapper(int value) : value(value) {}
int value;
bool operator==(const Wrapper& other) const { return value == other.value; }
protected:
friend class RefCounted<Wrapper>;
virtual ~Wrapper() = default;
};
auto a = MakeRefCounted<Wrapper>(1234);
auto b1 = MakeRefCounted<Wrapper>(5678);
auto b2 = MakeRefCounted<Wrapper>(5678);
EXPECT_TRUE(
ValuesEquivalent(scoped_refptr<Wrapper>(), scoped_refptr<Wrapper>()));
EXPECT_FALSE(ValuesEquivalent(a, scoped_refptr<Wrapper>()));
EXPECT_FALSE(ValuesEquivalent(scoped_refptr<Wrapper>(), a));
EXPECT_FALSE(ValuesEquivalent(a, b1));
EXPECT_TRUE(ValuesEquivalent(a, a));
EXPECT_TRUE(ValuesEquivalent(b1, b2));
}
TEST(ValuesEquivalentTest, CapitalGetPtr) {
class IntPointer {
public:
explicit IntPointer(int* pointer) : pointer_(pointer) {}
const int* Get() const { return pointer_; }
private:
raw_ptr<int> pointer_ = nullptr;
};
auto a = 1234;
auto b1 = 5678;
auto b2 = 5678;
EXPECT_TRUE(ValuesEquivalent(IntPointer(nullptr), IntPointer(nullptr)));
EXPECT_FALSE(ValuesEquivalent(IntPointer(&a), IntPointer(nullptr)));
EXPECT_FALSE(ValuesEquivalent(IntPointer(nullptr), IntPointer(&a)));
EXPECT_FALSE(ValuesEquivalent(IntPointer(&a), IntPointer(&b1)));
EXPECT_TRUE(ValuesEquivalent(IntPointer(&a), IntPointer(&a)));
EXPECT_TRUE(ValuesEquivalent(IntPointer(&b1), IntPointer(&b2)));
}
TEST(ValuesEquivalentTest, BypassEqualsOperator) {
struct NeverEqual {
bool operator==(const NeverEqual& other) const { return false; }
} a, b;
ASSERT_FALSE(a == a);
ASSERT_FALSE(a == b);
EXPECT_TRUE(ValuesEquivalent(&a, &a));
EXPECT_FALSE(ValuesEquivalent(&a, &b));
}
TEST(ValuesEquavalentTest, Predicate) {
auto is_same_or_next = [](int a, int b) { return a == b || a == b + 1; };
int x = 1;
int y = 2;
int z = 3;
EXPECT_TRUE(ValuesEquivalent(&x, &x, is_same_or_next));
EXPECT_FALSE(ValuesEquivalent(&x, &y, is_same_or_next));
EXPECT_FALSE(ValuesEquivalent(&x, &z, is_same_or_next));
EXPECT_TRUE(ValuesEquivalent(&y, &x, is_same_or_next));
EXPECT_FALSE(ValuesEquivalent(&y, &z, is_same_or_next));
EXPECT_FALSE(ValuesEquivalent(&z, &x, is_same_or_next));
EXPECT_TRUE(ValuesEquivalent(&z, &y, is_same_or_next));
EXPECT_TRUE(ValuesEquivalent<int>(nullptr, nullptr, is_same_or_next));
EXPECT_FALSE(ValuesEquivalent<int>(&x, nullptr, is_same_or_next));
EXPECT_FALSE(ValuesEquivalent<int>(nullptr, &x, is_same_or_next));
}
} // namespace base
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