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///////////////////////////////////////////////////////////////////////////////
//
// 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> // finally, narrow_cast
#include <gsl/gsl_narrow> // for narrow, narrowing_error
#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
{
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_const_lvalue_lambda)
{
int i = 0;
{
const auto const_lvalue_lambda = [&]() { f(i); };
auto _ = finally(const_lvalue_lambda);
EXPECT_TRUE(i == 0);
}
EXPECT_TRUE(i == 1);
}
TEST(utils_tests, finally_mutable_lvalue_lambda)
{
int i = 0;
{
auto mutable_lvalue_lambda = [&]() { f(i); };
auto _ = finally(mutable_lvalue_lambda);
EXPECT_TRUE(i == 0);
}
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)
{
int n = 120;
const char c = narrow<char>(n);
EXPECT_TRUE(c == 120);
n = 300;
EXPECT_THROW(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();
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_THROW(narrow<uint32_t>(int32_t(-1)), narrowing_error);
EXPECT_THROW(narrow<uint32_t>(int32_min), narrowing_error);
n = -42;
EXPECT_THROW(narrow<unsigned>(n), narrowing_error);
}
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