1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
///////////////////////////////////////////////////////////////////////////////
//
// 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::size_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
}
|