mirror of
https://github.com/microsoft/GSL.git
synced 2024-11-25 17:21:58 -05:00
137 lines
3.4 KiB
C++
137 lines
3.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
|
|
//
|
|
// This code is licensed under the MIT License (MIT).
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <gtest/gtest.h>
|
|
|
|
#include <gsl/gsl_util> // for narrow, finally, narrow_cast, narrowing_e...
|
|
|
|
#include <algorithm> // for move
|
|
#include <functional> // for reference_wrapper, _Bind_helper<>::type
|
|
#include <limits> // for numeric_limits
|
|
#include <stdint.h> // for uint32_t, int32_t
|
|
#include <type_traits> // for is_same
|
|
#include <cstddef> // for std::ptrdiff_t
|
|
|
|
using namespace gsl;
|
|
|
|
namespace
|
|
{
|
|
static constexpr char deathstring[] = "Expected Death";
|
|
void f(int& i) { i += 1; }
|
|
static int j = 0;
|
|
void g() { j += 1; }
|
|
}
|
|
|
|
|
|
TEST(utils_tests, sanity_check_for_gsl_index_typedef)
|
|
{
|
|
static_assert(std::is_same<gsl::index, std::ptrdiff_t>::value,
|
|
"gsl::index represents wrong arithmetic type");
|
|
}
|
|
|
|
TEST(utils_tests, finally_lambda)
|
|
{
|
|
int i = 0;
|
|
{
|
|
auto _ = finally([&]() { f(i); });
|
|
EXPECT_TRUE(i == 0);
|
|
}
|
|
EXPECT_TRUE(i == 1);
|
|
}
|
|
|
|
TEST(utils_tests, finally_lambda_move)
|
|
{
|
|
int i = 0;
|
|
{
|
|
auto _1 = finally([&]() { f(i); });
|
|
{
|
|
auto _2 = std::move(_1);
|
|
EXPECT_TRUE(i == 0);
|
|
}
|
|
EXPECT_TRUE(i == 1);
|
|
{
|
|
auto _2 = std::move(_1);
|
|
EXPECT_TRUE(i == 1);
|
|
}
|
|
EXPECT_TRUE(i == 1);
|
|
}
|
|
EXPECT_TRUE(i == 1);
|
|
}
|
|
|
|
TEST(utils_tests, finally_function_with_bind)
|
|
{
|
|
int i = 0;
|
|
{
|
|
auto _ = finally(std::bind(&f, std::ref(i)));
|
|
EXPECT_TRUE(i == 0);
|
|
}
|
|
EXPECT_TRUE(i == 1);
|
|
}
|
|
|
|
TEST(utils_tests, finally_function_ptr)
|
|
{
|
|
j = 0;
|
|
{
|
|
auto _ = finally(&g);
|
|
EXPECT_TRUE(j == 0);
|
|
}
|
|
EXPECT_TRUE(j == 1);
|
|
}
|
|
|
|
TEST(utils_tests, narrow_cast)
|
|
{
|
|
int n = 120;
|
|
char c = narrow_cast<char>(n);
|
|
EXPECT_TRUE(c == 120);
|
|
|
|
n = 300;
|
|
unsigned char uc = narrow_cast<unsigned char>(n);
|
|
EXPECT_TRUE(uc == 44);
|
|
}
|
|
|
|
TEST(utils_tests, narrow)
|
|
{
|
|
std::set_terminate([] {
|
|
std::cerr << "Expected Death. narrow";
|
|
std::abort();
|
|
});
|
|
|
|
int n = 120;
|
|
const char c = narrow<char>(n);
|
|
EXPECT_TRUE(c == 120);
|
|
|
|
n = 300;
|
|
EXPECT_DEATH(narrow<char>(n), deathstring);
|
|
|
|
const auto int32_max = std::numeric_limits<int32_t>::max();
|
|
const auto int32_min = std::numeric_limits<int32_t>::min();
|
|
|
|
EXPECT_TRUE(narrow<uint32_t>(int32_t(0)) == 0);
|
|
EXPECT_TRUE(narrow<uint32_t>(int32_t(1)) == 1);
|
|
EXPECT_TRUE(narrow<uint32_t>(int32_max) == static_cast<uint32_t>(int32_max));
|
|
|
|
EXPECT_DEATH(narrow<uint32_t>(int32_t(-1)), deathstring);
|
|
EXPECT_DEATH(narrow<uint32_t>(int32_min), deathstring);
|
|
|
|
n = -42;
|
|
EXPECT_DEATH(narrow<unsigned>(n), deathstring);
|
|
|
|
#if GSL_CONSTEXPR_NARROW
|
|
static_assert(narrow<char>(120) == 120, "Fix GSL_CONSTEXPR_NARROW");
|
|
#endif
|
|
|
|
}
|