mirror of
https://github.com/microsoft/GSL.git
synced 2024-11-03 17:56:43 -05:00
121 lines
3.0 KiB
C++
121 lines
3.0 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 <catch/catch.hpp> // for AssertionHandler, StringRef, CHECK, TEST_...
|
|
|
|
#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
|
|
|
|
using namespace gsl;
|
|
|
|
TEST_CASE("sanity check for gsl::index typedef")
|
|
{
|
|
static_assert(std::is_same<gsl::index, std::ptrdiff_t>::value,
|
|
"gsl::index represents wrong arithmetic type");
|
|
}
|
|
|
|
void f(int& i) { i += 1; }
|
|
|
|
TEST_CASE("finally_lambda")
|
|
{
|
|
int i = 0;
|
|
{
|
|
auto _ = finally([&]() { f(i); });
|
|
CHECK(i == 0);
|
|
}
|
|
CHECK(i == 1);
|
|
}
|
|
|
|
TEST_CASE("finally_lambda_move")
|
|
{
|
|
int i = 0;
|
|
{
|
|
auto _1 = finally([&]() { f(i); });
|
|
{
|
|
auto _2 = std::move(_1);
|
|
CHECK(i == 0);
|
|
}
|
|
CHECK(i == 1);
|
|
{
|
|
auto _2 = std::move(_1);
|
|
CHECK(i == 1);
|
|
}
|
|
CHECK(i == 1);
|
|
}
|
|
CHECK(i == 1);
|
|
}
|
|
|
|
TEST_CASE("finally_function_with_bind")
|
|
{
|
|
int i = 0;
|
|
{
|
|
auto _ = finally(std::bind(&f, std::ref(i)));
|
|
CHECK(i == 0);
|
|
}
|
|
CHECK(i == 1);
|
|
}
|
|
|
|
int j = 0;
|
|
void g() { j += 1; }
|
|
TEST_CASE("finally_function_ptr")
|
|
{
|
|
j = 0;
|
|
{
|
|
auto _ = finally(&g);
|
|
CHECK(j == 0);
|
|
}
|
|
CHECK(j == 1);
|
|
}
|
|
|
|
TEST_CASE("narrow_cast")
|
|
{
|
|
int n = 120;
|
|
char c = narrow_cast<char>(n);
|
|
CHECK(c == 120);
|
|
|
|
n = 300;
|
|
unsigned char uc = narrow_cast<unsigned char>(n);
|
|
CHECK(uc == 44);
|
|
}
|
|
|
|
TEST_CASE("narrow")
|
|
{
|
|
int n = 120;
|
|
const char c = narrow<char>(n);
|
|
CHECK(c == 120);
|
|
|
|
n = 300;
|
|
CHECK_THROWS_AS(narrow<char>(n), narrowing_error);
|
|
|
|
const auto int32_max = std::numeric_limits<int32_t>::max();
|
|
const auto int32_min = std::numeric_limits<int32_t>::min();
|
|
|
|
CHECK(narrow<uint32_t>(int32_t(0)) == 0);
|
|
CHECK(narrow<uint32_t>(int32_t(1)) == 1);
|
|
CHECK(narrow<uint32_t>(int32_max) == static_cast<uint32_t>(int32_max));
|
|
|
|
CHECK_THROWS_AS(narrow<uint32_t>(int32_t(-1)), narrowing_error);
|
|
CHECK_THROWS_AS(narrow<uint32_t>(int32_min), narrowing_error);
|
|
|
|
n = -42;
|
|
CHECK_THROWS_AS(narrow<unsigned>(n), narrowing_error);
|
|
}
|