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//
// Copyright 2022 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/log/die_if_null.h"
#include <stdint.h>
#include <memory>
#include <utility>
#include "gtest/gtest.h"
#include "absl/base/attributes.h"
#include "absl/log/internal/test_helpers.h"
namespace {
auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
new absl::log_internal::LogTestEnvironment);
// TODO(b/69907837): Revisit these tests with the goal of making them less
// convoluted.
TEST(AbslDieIfNull, Simple) {
int64_t t;
void* ptr = static_cast<void*>(&t);
void* ref = ABSL_DIE_IF_NULL(ptr);
ASSERT_EQ(ptr, ref);
char* t_as_char;
t_as_char = ABSL_DIE_IF_NULL(reinterpret_cast<char*>(&t));
(void)t_as_char;
unsigned char* t_as_uchar;
t_as_uchar = ABSL_DIE_IF_NULL(reinterpret_cast<unsigned char*>(&t));
(void)t_as_uchar;
int* t_as_int;
t_as_int = ABSL_DIE_IF_NULL(reinterpret_cast<int*>(&t));
(void)t_as_int;
int64_t* t_as_int64_t;
t_as_int64_t = ABSL_DIE_IF_NULL(reinterpret_cast<int64_t*>(&t));
(void)t_as_int64_t;
std::unique_ptr<int64_t> sptr(new int64_t);
EXPECT_EQ(sptr.get(), ABSL_DIE_IF_NULL(sptr).get());
ABSL_DIE_IF_NULL(sptr).reset();
int64_t* int_ptr = new int64_t();
EXPECT_EQ(int_ptr, ABSL_DIE_IF_NULL(std::unique_ptr<int64_t>(int_ptr)).get());
}
#if GTEST_HAS_DEATH_TEST
TEST(DeathCheckAbslDieIfNull, Simple) {
void* ptr;
ASSERT_DEATH({ ptr = ABSL_DIE_IF_NULL(nullptr); }, "");
(void)ptr;
std::unique_ptr<int64_t> sptr;
ASSERT_DEATH(ptr = ABSL_DIE_IF_NULL(sptr).get(), "");
}
#endif
// Ensures that ABSL_DIE_IF_NULL works with C++11's std::unique_ptr and
// std::shared_ptr.
TEST(AbslDieIfNull, DoesNotCompareSmartPointerToNULL) {
std::unique_ptr<int> up(new int);
EXPECT_EQ(&up, &ABSL_DIE_IF_NULL(up));
ABSL_DIE_IF_NULL(up).reset();
std::shared_ptr<int> sp(new int);
EXPECT_EQ(&sp, &ABSL_DIE_IF_NULL(sp));
ABSL_DIE_IF_NULL(sp).reset();
}
// Verifies that ABSL_DIE_IF_NULL returns an rvalue reference if its argument is
// an rvalue reference.
TEST(AbslDieIfNull, PreservesRValues) {
int64_t* ptr = new int64_t();
auto uptr = ABSL_DIE_IF_NULL(std::unique_ptr<int64_t>(ptr));
EXPECT_EQ(ptr, uptr.get());
}
// Verifies that ABSL_DIE_IF_NULL returns an lvalue if its argument is an
// lvalue.
TEST(AbslDieIfNull, PreservesLValues) {
int64_t array[2] = {0};
int64_t* a = array + 0;
int64_t* b = array + 1;
using std::swap;
swap(ABSL_DIE_IF_NULL(a), ABSL_DIE_IF_NULL(b));
EXPECT_EQ(array + 1, a);
EXPECT_EQ(array + 0, b);
}
} // namespace
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