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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
/*
* This source code is released into the public domain
*/
#include <algorithm>
#include <string>
#include <type_traits>
#include <vector>
#include <catch2/catch_test_macros.hpp>
import nihil.posix;
namespace {
constexpr auto *test_tags = "[nihil][nihil.posix][nihil.posix.argv]";
TEST_CASE("nihil.posix: argv: invariants", test_tags)
{
static_assert(std::movable<nihil::argv>);
static_assert(std::move_constructible<nihil::argv>);
static_assert(std::is_nothrow_move_constructible_v<nihil::argv>);
static_assert(std::is_nothrow_move_assignable_v<nihil::argv>);
static_assert(!std::copy_constructible<nihil::argv>);
static_assert(std::destructible<nihil::argv>);
static_assert(std::swappable<nihil::argv>);
static_assert(std::is_nothrow_swappable_v<nihil::argv>);
static_assert(std::constructible_from<nihil::argv,
std::initializer_list<std::string_view>>);
static_assert(std::constructible_from<nihil::argv,
std::initializer_list<std::string>>);
static_assert(std::constructible_from<nihil::argv,
std::initializer_list<char const *>>);
static_assert(std::constructible_from<nihil::argv,
std::initializer_list<char *>>);
static_assert(std::ranges::sized_range<nihil::argv>);
static_assert(std::ranges::contiguous_range<nihil::argv>);
}
SCENARIO("nihil::argv::size() works")
{
GIVEN("An argv constructed from 3 elements")
{
auto argv = nihil::argv{"one", "two", "three"};
THEN("size() returns 4")
{
REQUIRE(std::ranges::size(argv) == 4);
}
}
}
SCENARIO("nihil::argv::operator[] works")
{
using namespace std::literals;
GIVEN("An argv constructed from 3 elements")
{
auto argv = nihil::argv{"one", "two", "three"};
THEN("operator[] returns the expected elements")
{
REQUIRE(argv[0] == "one"sv);
REQUIRE(argv[1] == "two"sv);
REQUIRE(argv[2] == "three"sv);
REQUIRE(argv[3] == nullptr);
}
AND_THEN("operator[] on a non-existent element throws std::out_of_range")
{
REQUIRE_THROWS_AS(argv[4], std::out_of_range);
}
}
}
SCENARIO("nihil::argv can be constructed from an initializer_list<char const *>")
{
using namespace std::literals;
GIVEN("An argv constructed from an initializer_list")
{
auto argv = nihil::argv{"one", "two", "three"};
THEN("size() returns 4")
{
REQUIRE(std::ranges::size(argv) == 4);
}
AND_THEN("The stored values match the initializer_list")
{
REQUIRE(argv[0] == "one"sv);
REQUIRE(argv[1] == "two"sv);
REQUIRE(argv[2] == "three"sv);
REQUIRE(argv[3] == nullptr);
}
}
}
SCENARIO("nihil::argv can be constructed from an initializer_list<std::string_view>")
{
using namespace std::literals;
GIVEN("An argv constructed from an initializer_list")
{
auto argv = nihil::argv{"one"sv, "two"sv, "three"sv};
THEN("size() returns 4")
{
REQUIRE(std::ranges::size(argv) == 4);
}
AND_THEN("The stored values match the initializer_list")
{
REQUIRE(argv[0] == "one"sv);
REQUIRE(argv[1] == "two"sv);
REQUIRE(argv[2] == "three"sv);
REQUIRE(argv[3] == nullptr);
}
}
}
SCENARIO("nihil::argv can be constructed from a range of std::string")
{
using namespace std::literals;
GIVEN("An argv constructed from an initializer_list")
{
auto vec = std::vector{"one"s, "two"s, "three"s};
auto argv = nihil::argv(std::from_range, vec);
THEN("size() returns 4")
{
REQUIRE(std::ranges::size(argv) == 4);
}
AND_THEN("The stored values match the range")
{
REQUIRE(argv[0] == "one"sv);
REQUIRE(argv[1] == "two"sv);
REQUIRE(argv[2] == "three"sv);
REQUIRE(argv[3] == nullptr);
}
}
}
SCENARIO("nihil::data() returns the correct data")
{
using namespace std::literals;
GIVEN("An argv")
{
auto argv = nihil::argv{"one", "two", "three"};
THEN("The values in data() match the provided data")
{
REQUIRE(argv.data()[0] == "one"sv);
REQUIRE(argv.data()[1] == "two"sv);
REQUIRE(argv.data()[2] == "three"sv);
REQUIRE(argv.data()[3] == nullptr);
}
}
}
SCENARIO("nihil::argv can be used as a range")
{
using namespace std::literals;
GIVEN("An argv")
{
auto argv = nihil::argv{"one"sv, "two"sv, "three"sv};
WHEN("An std::vector is constructed from the argv")
{
auto vec = std::vector(std::from_range, argv);
THEN("The argv and the vector contain the same data")
{
REQUIRE(std::ranges::equal(argv, vec));
}
}
WHEN("The argv is copied to an std::vector using a range-based for")
{
auto vec = std::vector<char *>();
for (auto &&arg: argv)
vec.push_back(arg);
THEN("The argv and the vector contain the same data")
{
REQUIRE(std::ranges::equal(argv, vec));
}
}
}
}
SCENARIO("nihil::argv can be move-constructed")
{
using namespace std::literals;
GIVEN("An argv object")
{
auto argv = nihil::argv{"one", "two", "three"};
WHEN("The argv is moved")
{
auto argv2 = std::move(argv);
THEN("The new object contains the data")
{
REQUIRE(argv2.size() == 4);
REQUIRE(argv2[0] == "one"sv);
}
AND_THEN("The old object does not")
{
REQUIRE(argv.size() == 0);
}
}
}
}
SCENARIO("nihil::argv can be move-assigned")
{
using namespace std::literals;
GIVEN("Two argv objects")
{
auto argv1 = nihil::argv{"one", "two", "three"};
auto argv2 = nihil::argv{"x", "y"};
WHEN("argv2 is move-assigned to argv1")
{
argv1 = std::move(argv2);
THEN("argv1 contains the data from argv2")
{
REQUIRE(argv1.size() == 3);
REQUIRE(argv1[0] == "x"sv);
REQUIRE(argv1[1] == "y"sv);
REQUIRE(argv1[2] == nullptr);
}
AND_THEN("argv2 is empty")
{
REQUIRE(argv2.size() == 0);
}
}
}
}
} // anonymous namespace
|
