1///////////////////////////////////////////////////////////////////////////////
2//
3// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
4//
5// This code is licensed under the MIT License (MIT).
6//
7// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
8// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
9// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
10// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
11// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
12// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
13// THE SOFTWARE.
14//
15///////////////////////////////////////////////////////////////////////////////
16
17#include <catch/catch.hpp>
18
19#include <gsl/gsl>
20
21#include <functional>
22
23using namespace gsl;
24
25void f(int& i) { i += 1; }
26
27TEST_CASE("finally_lambda")
28{
29    int i = 0;
30    {
31        auto _ = finally([&]() { f(i); });
32        CHECK(i == 0);
33    }
34    CHECK(i == 1);
35}
36
37TEST_CASE("finally_lambda_move")
38{
39    int i = 0;
40    {
41        auto _1 = finally([&]() { f(i); });
42        {
43            auto _2 = std::move(_1);
44            CHECK(i == 0);
45        }
46        CHECK(i == 1);
47        {
48            auto _2 = std::move(_1);
49            CHECK(i == 1);
50        }
51        CHECK(i == 1);
52    }
53    CHECK(i == 1);
54}
55
56TEST_CASE("finally_function_with_bind")
57{
58    int i = 0;
59    {
60        auto _ = finally(std::bind(&f, std::ref(i)));
61        CHECK(i == 0);
62    }
63    CHECK(i == 1);
64}
65
66int j = 0;
67void g() { j += 1; }
68TEST_CASE("finally_function_ptr")
69{
70    j = 0;
71    {
72        auto _ = finally(&g);
73        CHECK(j == 0);
74    }
75    CHECK(j == 1);
76}
77
78TEST_CASE("narrow_cast")
79{
80    int n = 120;
81    char c = narrow_cast<char>(n);
82    CHECK(c == 120);
83
84    n = 300;
85    unsigned char uc = narrow_cast<unsigned char>(n);
86    CHECK(uc == 44);
87}
88
89TEST_CASE("narrow")
90{
91    int n = 120;
92    const char c = narrow<char>(n);
93    CHECK(c == 120);
94
95    n = 300;
96    CHECK_THROWS_AS(narrow<char>(n), narrowing_error);
97
98    const auto int32_max = std::numeric_limits<int32_t>::max();
99    const auto int32_min = std::numeric_limits<int32_t>::min();
100
101    CHECK(narrow<uint32_t>(int32_t(0)) == 0);
102    CHECK(narrow<uint32_t>(int32_t(1)) == 1);
103    CHECK(narrow<uint32_t>(int32_max) == static_cast<uint32_t>(int32_max));
104
105    CHECK_THROWS_AS(narrow<uint32_t>(int32_t(-1)), narrowing_error);
106    CHECK_THROWS_AS(narrow<uint32_t>(int32_min), narrowing_error);
107
108    n = -42;
109    CHECK_THROWS_AS(narrow<unsigned>(n), narrowing_error);
110}
111