Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "android-base/expected.h" |
| 18 | |
| 19 | #include <cstdio> |
| 20 | #include <memory> |
| 21 | #include <string> |
| 22 | |
| 23 | #include <gtest/gtest.h> |
| 24 | |
| 25 | using android::base::expected; |
| 26 | using android::base::unexpected; |
| 27 | |
| 28 | typedef expected<int, int> exp_int; |
| 29 | typedef expected<double, double> exp_double; |
| 30 | typedef expected<std::string, std::string> exp_string; |
| 31 | typedef expected<std::pair<std::string, int>, int> exp_pair; |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 32 | typedef expected<void, int> exp_void; |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 33 | |
| 34 | struct T { |
| 35 | int a; |
| 36 | int b; |
| 37 | T() = default; |
| 38 | T(int a, int b) noexcept : a(a), b(b) {} |
| 39 | }; |
| 40 | bool operator==(const T& x, const T& y) { |
| 41 | return x.a == y.a && x.b == y.b; |
| 42 | } |
| 43 | bool operator!=(const T& x, const T& y) { |
| 44 | return x.a != y.a || x.b != y.b; |
| 45 | } |
| 46 | |
| 47 | struct E { |
| 48 | std::string message; |
| 49 | int cause; |
| 50 | E(const std::string& message, int cause) : message(message), cause(cause) {} |
| 51 | }; |
| 52 | |
| 53 | typedef expected<T,E> exp_complex; |
| 54 | |
| 55 | TEST(Expected, testDefaultConstructible) { |
| 56 | exp_int e; |
| 57 | EXPECT_TRUE(e.has_value()); |
| 58 | EXPECT_EQ(0, e.value()); |
| 59 | |
| 60 | exp_complex e2; |
| 61 | EXPECT_TRUE(e2.has_value()); |
| 62 | EXPECT_EQ(T(0,0), e2.value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 63 | |
| 64 | exp_void e3; |
| 65 | EXPECT_TRUE(e3.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | TEST(Expected, testCopyConstructible) { |
| 69 | exp_int e; |
| 70 | exp_int e2 = e; |
| 71 | |
| 72 | EXPECT_TRUE(e.has_value()); |
| 73 | EXPECT_TRUE(e2.has_value()); |
| 74 | EXPECT_EQ(0, e.value()); |
| 75 | EXPECT_EQ(0, e2.value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 76 | |
| 77 | exp_void e3; |
| 78 | exp_void e4 = e3; |
| 79 | EXPECT_TRUE(e3.has_value()); |
| 80 | EXPECT_TRUE(e4.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | TEST(Expected, testMoveConstructible) { |
| 84 | exp_int e; |
| 85 | exp_int e2 = std::move(e); |
| 86 | |
| 87 | EXPECT_TRUE(e.has_value()); |
| 88 | EXPECT_TRUE(e2.has_value()); |
| 89 | EXPECT_EQ(0, e.value()); |
| 90 | EXPECT_EQ(0, e2.value()); |
| 91 | |
| 92 | exp_string e3(std::string("hello")); |
| 93 | exp_string e4 = std::move(e3); |
| 94 | |
| 95 | EXPECT_TRUE(e3.has_value()); |
| 96 | EXPECT_TRUE(e4.has_value()); |
| 97 | EXPECT_EQ("", e3.value()); // e3 is moved |
| 98 | EXPECT_EQ("hello", e4.value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 99 | |
| 100 | exp_void e5; |
| 101 | exp_void e6 = std::move(e5); |
| 102 | EXPECT_TRUE(e5.has_value()); |
| 103 | EXPECT_TRUE(e6.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | TEST(Expected, testCopyConstructibleFromConvertibleType) { |
| 107 | exp_double e = 3.3f; |
| 108 | exp_int e2 = e; |
| 109 | |
| 110 | EXPECT_TRUE(e.has_value()); |
| 111 | EXPECT_TRUE(e2.has_value()); |
| 112 | EXPECT_EQ(3.3f, e.value()); |
| 113 | EXPECT_EQ(3, e2.value()); |
| 114 | } |
| 115 | |
| 116 | TEST(Expected, testMoveConstructibleFromConvertibleType) { |
| 117 | exp_double e = 3.3f; |
| 118 | exp_int e2 = std::move(e); |
| 119 | |
| 120 | EXPECT_TRUE(e.has_value()); |
| 121 | EXPECT_TRUE(e2.has_value()); |
| 122 | EXPECT_EQ(3.3f, e.value()); |
| 123 | EXPECT_EQ(3, e2.value()); |
| 124 | } |
| 125 | |
| 126 | TEST(Expected, testConstructibleFromValue) { |
| 127 | exp_int e = 3; |
| 128 | exp_double e2 = 5.5f; |
| 129 | exp_string e3 = std::string("hello"); |
| 130 | exp_complex e4 = T(10, 20); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 131 | exp_void e5 = {}; |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 132 | |
| 133 | EXPECT_TRUE(e.has_value()); |
| 134 | EXPECT_TRUE(e2.has_value()); |
| 135 | EXPECT_TRUE(e3.has_value()); |
| 136 | EXPECT_TRUE(e4.has_value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 137 | EXPECT_TRUE(e5.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 138 | EXPECT_EQ(3, e.value()); |
| 139 | EXPECT_EQ(5.5f, e2.value()); |
| 140 | EXPECT_EQ("hello", e3.value()); |
| 141 | EXPECT_EQ(T(10,20), e4.value()); |
| 142 | } |
| 143 | |
| 144 | TEST(Expected, testConstructibleFromMovedValue) { |
| 145 | std::string hello = "hello"; |
| 146 | exp_string e = std::move(hello); |
| 147 | |
| 148 | EXPECT_TRUE(e.has_value()); |
| 149 | EXPECT_EQ("hello", e.value()); |
| 150 | EXPECT_EQ("", hello); |
| 151 | } |
| 152 | |
| 153 | TEST(Expected, testConstructibleFromConvertibleValue) { |
| 154 | exp_int e = 3.3f; // double to int |
| 155 | exp_string e2 = "hello"; // char* to std::string |
| 156 | EXPECT_TRUE(e.has_value()); |
| 157 | EXPECT_EQ(3, e.value()); |
| 158 | |
| 159 | EXPECT_TRUE(e2.has_value()); |
| 160 | EXPECT_EQ("hello", e2.value()); |
| 161 | } |
| 162 | |
| 163 | TEST(Expected, testConstructibleFromUnexpected) { |
| 164 | exp_int::unexpected_type unexp = unexpected(10); |
| 165 | exp_int e = unexp; |
| 166 | |
| 167 | exp_double::unexpected_type unexp2 = unexpected(10.5f); |
| 168 | exp_double e2 = unexp2; |
| 169 | |
| 170 | exp_string::unexpected_type unexp3 = unexpected(std::string("error")); |
| 171 | exp_string e3 = unexp3; |
| 172 | |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 173 | exp_void::unexpected_type unexp4 = unexpected(10); |
| 174 | exp_void e4 = unexp4; |
| 175 | |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 176 | EXPECT_FALSE(e.has_value()); |
| 177 | EXPECT_FALSE(e2.has_value()); |
| 178 | EXPECT_FALSE(e3.has_value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 179 | EXPECT_FALSE(e4.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 180 | EXPECT_EQ(10, e.error()); |
| 181 | EXPECT_EQ(10.5f, e2.error()); |
| 182 | EXPECT_EQ("error", e3.error()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 183 | EXPECT_EQ(10, e4.error()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | TEST(Expected, testMoveConstructibleFromUnexpected) { |
| 187 | exp_int e = unexpected(10); |
| 188 | exp_double e2 = unexpected(10.5f); |
| 189 | exp_string e3 = unexpected(std::string("error")); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 190 | exp_void e4 = unexpected(10); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 191 | |
| 192 | EXPECT_FALSE(e.has_value()); |
| 193 | EXPECT_FALSE(e2.has_value()); |
| 194 | EXPECT_FALSE(e3.has_value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 195 | EXPECT_FALSE(e4.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 196 | EXPECT_EQ(10, e.error()); |
| 197 | EXPECT_EQ(10.5f, e2.error()); |
| 198 | EXPECT_EQ("error", e3.error()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 199 | EXPECT_EQ(10, e4.error()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | TEST(Expected, testConstructibleByForwarding) { |
| 203 | exp_string e(std::in_place, 5, 'a'); |
| 204 | EXPECT_TRUE(e.has_value()); |
| 205 | EXPECT_EQ("aaaaa", e.value()); |
| 206 | |
| 207 | exp_string e2({'a', 'b', 'c'}); |
| 208 | EXPECT_TRUE(e2.has_value()); |
| 209 | EXPECT_EQ("abc", e2.value()); |
| 210 | |
| 211 | exp_pair e3({"hello", 30}); |
| 212 | EXPECT_TRUE(e3.has_value()); |
| 213 | EXPECT_EQ("hello",e3->first); |
| 214 | EXPECT_EQ(30,e3->second); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 215 | |
| 216 | exp_void e4({}); |
| 217 | EXPECT_TRUE(e4.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | TEST(Expected, testDestructible) { |
| 221 | bool destroyed = false; |
| 222 | struct T { |
| 223 | bool* flag_; |
| 224 | T(bool* flag) : flag_(flag) {} |
| 225 | ~T() { *flag_ = true; } |
| 226 | }; |
| 227 | { |
| 228 | expected<T, int> exp = T(&destroyed); |
| 229 | } |
| 230 | EXPECT_TRUE(destroyed); |
| 231 | } |
| 232 | |
| 233 | TEST(Expected, testAssignable) { |
| 234 | exp_int e = 10; |
| 235 | exp_int e2 = 20; |
| 236 | e = e2; |
| 237 | |
| 238 | EXPECT_EQ(20, e.value()); |
| 239 | EXPECT_EQ(20, e2.value()); |
| 240 | |
| 241 | exp_int e3 = 10; |
| 242 | exp_int e4 = 20; |
| 243 | e3 = std::move(e4); |
| 244 | |
| 245 | EXPECT_EQ(20, e3.value()); |
| 246 | EXPECT_EQ(20, e4.value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 247 | |
| 248 | exp_void e5 = unexpected(10); |
| 249 | ASSERT_FALSE(e5.has_value()); |
| 250 | exp_void e6; |
| 251 | e5 = e6; |
| 252 | |
| 253 | EXPECT_TRUE(e5.has_value()); |
| 254 | EXPECT_TRUE(e6.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | TEST(Expected, testAssignableFromValue) { |
| 258 | exp_int e = 10; |
| 259 | e = 20; |
| 260 | EXPECT_EQ(20, e.value()); |
| 261 | |
| 262 | exp_double e2 = 3.5f; |
| 263 | e2 = 10.5f; |
| 264 | EXPECT_EQ(10.5f, e2.value()); |
| 265 | |
| 266 | exp_string e3 = "hello"; |
| 267 | e3 = "world"; |
| 268 | EXPECT_EQ("world", e3.value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 269 | |
| 270 | exp_void e4 = unexpected(10); |
| 271 | ASSERT_FALSE(e4.has_value()); |
| 272 | e4 = {}; |
| 273 | EXPECT_TRUE(e4.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | TEST(Expected, testAssignableFromUnexpected) { |
| 277 | exp_int e = 10; |
| 278 | e = unexpected(30); |
| 279 | EXPECT_FALSE(e.has_value()); |
| 280 | EXPECT_EQ(30, e.error()); |
| 281 | |
| 282 | exp_double e2 = 3.5f; |
| 283 | e2 = unexpected(10.5f); |
| 284 | EXPECT_FALSE(e2.has_value()); |
| 285 | EXPECT_EQ(10.5f, e2.error()); |
| 286 | |
| 287 | exp_string e3 = "hello"; |
| 288 | e3 = unexpected("world"); |
| 289 | EXPECT_FALSE(e3.has_value()); |
| 290 | EXPECT_EQ("world", e3.error()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 291 | |
| 292 | exp_void e4 = {}; |
| 293 | e4 = unexpected(10); |
| 294 | EXPECT_FALSE(e4.has_value()); |
| 295 | EXPECT_EQ(10, e4.error()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | TEST(Expected, testAssignableFromMovedValue) { |
| 299 | std::string world = "world"; |
| 300 | exp_string e = "hello"; |
| 301 | e = std::move(world); |
| 302 | |
| 303 | EXPECT_TRUE(e.has_value()); |
| 304 | EXPECT_EQ("world", e.value()); |
| 305 | EXPECT_EQ("", world); |
| 306 | } |
| 307 | |
| 308 | TEST(Expected, testAssignableFromMovedUnexpected) { |
| 309 | std::string world = "world"; |
| 310 | exp_string e = "hello"; |
| 311 | e = unexpected(std::move(world)); |
| 312 | |
| 313 | EXPECT_FALSE(e.has_value()); |
| 314 | EXPECT_EQ("world", e.error()); |
| 315 | EXPECT_EQ("", world); |
| 316 | } |
| 317 | |
| 318 | TEST(Expected, testEmplace) { |
| 319 | struct T { |
| 320 | int a; |
| 321 | double b; |
| 322 | T() {} |
| 323 | T(int a, double b) noexcept : a(a), b(b) {} |
| 324 | }; |
| 325 | expected<T, int> exp; |
| 326 | T& t = exp.emplace(3, 10.5f); |
| 327 | |
| 328 | EXPECT_TRUE(exp.has_value()); |
| 329 | EXPECT_EQ(3, t.a); |
| 330 | EXPECT_EQ(10.5f, t.b); |
| 331 | EXPECT_EQ(3, exp.value().a); |
| 332 | EXPECT_EQ(10.5, exp.value().b); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 333 | |
| 334 | exp_void e = unexpected(10); |
| 335 | ASSERT_FALSE(e.has_value()); |
| 336 | e.emplace(); |
| 337 | EXPECT_TRUE(e.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | TEST(Expected, testSwapExpectedExpected) { |
| 341 | exp_int e = 10; |
| 342 | exp_int e2 = 20; |
| 343 | e.swap(e2); |
| 344 | |
| 345 | EXPECT_TRUE(e.has_value()); |
| 346 | EXPECT_TRUE(e2.has_value()); |
| 347 | EXPECT_EQ(20, e.value()); |
| 348 | EXPECT_EQ(10, e2.value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 349 | |
| 350 | exp_void e3; |
| 351 | exp_void e4; |
| 352 | e3.swap(e4); |
| 353 | |
| 354 | EXPECT_TRUE(e3.has_value()); |
| 355 | EXPECT_TRUE(e4.has_value()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | TEST(Expected, testSwapUnexpectedUnexpected) { |
| 359 | exp_int e = unexpected(10); |
| 360 | exp_int e2 = unexpected(20); |
| 361 | e.swap(e2); |
| 362 | EXPECT_FALSE(e.has_value()); |
| 363 | EXPECT_FALSE(e2.has_value()); |
| 364 | EXPECT_EQ(20, e.error()); |
| 365 | EXPECT_EQ(10, e2.error()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 366 | |
| 367 | exp_void e3 = unexpected(10); |
| 368 | exp_void e4 = unexpected(20); |
| 369 | e3.swap(e4); |
| 370 | EXPECT_FALSE(e3.has_value()); |
| 371 | EXPECT_FALSE(e4.has_value()); |
| 372 | EXPECT_EQ(20, e3.error()); |
| 373 | EXPECT_EQ(10, e4.error()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | TEST(Expected, testSwapExpectedUnepected) { |
| 377 | exp_int e = 10; |
| 378 | exp_int e2 = unexpected(30); |
| 379 | e.swap(e2); |
| 380 | EXPECT_FALSE(e.has_value()); |
| 381 | EXPECT_TRUE(e2.has_value()); |
| 382 | EXPECT_EQ(30, e.error()); |
| 383 | EXPECT_EQ(10, e2.value()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 384 | |
| 385 | exp_void e3; |
| 386 | exp_void e4 = unexpected(10); |
| 387 | e3.swap(e4); |
| 388 | EXPECT_FALSE(e3.has_value()); |
| 389 | EXPECT_TRUE(e4.has_value()); |
| 390 | EXPECT_EQ(10, e3.error()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | TEST(Expected, testDereference) { |
| 394 | struct T { |
| 395 | int a; |
| 396 | double b; |
| 397 | T() {} |
| 398 | T(int a, double b) : a(a), b(b) {} |
| 399 | }; |
| 400 | expected<T, int> exp = T(3, 10.5f); |
| 401 | |
| 402 | EXPECT_EQ(3, exp->a); |
| 403 | EXPECT_EQ(10.5f, exp->b); |
| 404 | |
| 405 | EXPECT_EQ(3, (*exp).a); |
| 406 | EXPECT_EQ(10.5f, (*exp).b); |
| 407 | } |
| 408 | |
| 409 | TEST(Expected, testTest) { |
| 410 | exp_int e = 10; |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 411 | EXPECT_TRUE(e.ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 412 | EXPECT_TRUE(e.has_value()); |
| 413 | |
| 414 | exp_int e2 = unexpected(10); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 415 | EXPECT_FALSE(e2.ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 416 | EXPECT_FALSE(e2.has_value()); |
| 417 | } |
| 418 | |
| 419 | TEST(Expected, testGetValue) { |
| 420 | exp_int e = 10; |
| 421 | EXPECT_EQ(10, e.value()); |
| 422 | EXPECT_EQ(10, e.value_or(20)); |
| 423 | |
| 424 | exp_int e2 = unexpected(10); |
| 425 | EXPECT_EQ(10, e2.error()); |
| 426 | EXPECT_EQ(20, e2.value_or(20)); |
| 427 | } |
| 428 | |
| 429 | TEST(Expected, testSameValues) { |
| 430 | exp_int e = 10; |
| 431 | exp_int e2 = 10; |
| 432 | EXPECT_TRUE(e == e2); |
| 433 | EXPECT_TRUE(e2 == e); |
| 434 | EXPECT_FALSE(e != e2); |
| 435 | EXPECT_FALSE(e2 != e); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 436 | |
| 437 | exp_void e3; |
| 438 | exp_void e4; |
| 439 | EXPECT_TRUE(e3 == e4); |
| 440 | EXPECT_TRUE(e4 == e3); |
| 441 | EXPECT_FALSE(e3 != e4); |
| 442 | EXPECT_FALSE(e4 != e3); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | TEST(Expected, testDifferentValues) { |
| 446 | exp_int e = 10; |
| 447 | exp_int e2 = 20; |
| 448 | EXPECT_FALSE(e == e2); |
| 449 | EXPECT_FALSE(e2 == e); |
| 450 | EXPECT_TRUE(e != e2); |
| 451 | EXPECT_TRUE(e2 != e); |
| 452 | } |
| 453 | |
| 454 | TEST(Expected, testValueWithError) { |
| 455 | exp_int e = 10; |
| 456 | exp_int e2 = unexpected(10); |
| 457 | EXPECT_FALSE(e == e2); |
| 458 | EXPECT_FALSE(e2 == e); |
| 459 | EXPECT_TRUE(e != e2); |
| 460 | EXPECT_TRUE(e2 != e); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 461 | |
| 462 | exp_void e3; |
| 463 | exp_void e4 = unexpected(10); |
| 464 | EXPECT_FALSE(e3 == e4); |
| 465 | EXPECT_FALSE(e4 == e3); |
| 466 | EXPECT_TRUE(e3 != e4); |
| 467 | EXPECT_TRUE(e4 != e3); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | TEST(Expected, testSameErrors) { |
| 471 | exp_int e = unexpected(10); |
| 472 | exp_int e2 = unexpected(10); |
| 473 | EXPECT_TRUE(e == e2); |
| 474 | EXPECT_TRUE(e2 == e); |
| 475 | EXPECT_FALSE(e != e2); |
| 476 | EXPECT_FALSE(e2 != e); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 477 | |
| 478 | exp_void e3 = unexpected(10); |
| 479 | exp_void e4 = unexpected(10); |
| 480 | EXPECT_TRUE(e3 == e4); |
| 481 | EXPECT_TRUE(e4 == e3); |
| 482 | EXPECT_FALSE(e3 != e4); |
| 483 | EXPECT_FALSE(e4 != e3); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | TEST(Expected, testDifferentErrors) { |
| 487 | exp_int e = unexpected(10); |
| 488 | exp_int e2 = unexpected(20); |
| 489 | EXPECT_FALSE(e == e2); |
| 490 | EXPECT_FALSE(e2 == e); |
| 491 | EXPECT_TRUE(e != e2); |
| 492 | EXPECT_TRUE(e2 != e); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 493 | |
| 494 | exp_void e3 = unexpected(10); |
| 495 | exp_void e4 = unexpected(20); |
| 496 | EXPECT_FALSE(e3 == e4); |
| 497 | EXPECT_FALSE(e4 == e3); |
| 498 | EXPECT_TRUE(e3 != e4); |
| 499 | EXPECT_TRUE(e4 != e3); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 500 | } |
| 501 | |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 502 | TEST(Expected, testCompareWithSameError) { |
| 503 | exp_int e = unexpected(10); |
| 504 | exp_int::unexpected_type error = 10; |
| 505 | EXPECT_TRUE(e == error); |
| 506 | EXPECT_TRUE(error == e); |
| 507 | EXPECT_FALSE(e != error); |
| 508 | EXPECT_FALSE(error != e); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 509 | |
| 510 | exp_void e2 = unexpected(10); |
| 511 | exp_void::unexpected_type error2 = 10; |
| 512 | EXPECT_TRUE(e2 == error2); |
| 513 | EXPECT_TRUE(error2 == e2); |
| 514 | EXPECT_FALSE(e2 != error2); |
| 515 | EXPECT_FALSE(error2 != e2); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 516 | } |
| 517 | |
| 518 | TEST(Expected, testCompareWithDifferentError) { |
| 519 | exp_int e = unexpected(10); |
| 520 | exp_int::unexpected_type error = 20; |
| 521 | EXPECT_FALSE(e == error); |
| 522 | EXPECT_FALSE(error == e); |
| 523 | EXPECT_TRUE(e != error); |
| 524 | EXPECT_TRUE(error != e); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 525 | |
| 526 | exp_void e2 = unexpected(10); |
| 527 | exp_void::unexpected_type error2 = 20; |
| 528 | EXPECT_FALSE(e2 == error2); |
| 529 | EXPECT_FALSE(error2 == e2); |
| 530 | EXPECT_TRUE(e2 != error2); |
| 531 | EXPECT_TRUE(error2 != e2); |
| 532 | } |
| 533 | |
| 534 | TEST(Expected, testCompareDifferentType) { |
| 535 | expected<int,int> e = 10; |
| 536 | expected<int32_t, int> e2 = 10; |
| 537 | EXPECT_TRUE(e == e2); |
| 538 | e2 = 20; |
| 539 | EXPECT_FALSE(e == e2); |
| 540 | |
| 541 | expected<std::string_view,int> e3 = "hello"; |
| 542 | expected<std::string,int> e4 = "hello"; |
| 543 | EXPECT_TRUE(e3 == e4); |
| 544 | e4 = "world"; |
| 545 | EXPECT_FALSE(e3 == e4); |
| 546 | |
| 547 | expected<void,int> e5; |
| 548 | expected<int,int> e6 = 10; |
| 549 | EXPECT_FALSE(e5 == e6); |
| 550 | EXPECT_FALSE(e6 == e5); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | TEST(Expected, testDivideExample) { |
| 554 | struct QR { |
| 555 | int quotient; |
| 556 | int remainder; |
| 557 | QR(int q, int r) noexcept : quotient(q), remainder(r) {} |
| 558 | bool operator==(const QR& rhs) const { |
| 559 | return quotient == rhs.quotient && remainder == rhs.remainder; |
| 560 | } |
| 561 | bool operator!=(const QR& rhs) const { |
| 562 | return quotient != rhs.quotient || remainder == rhs.remainder; |
| 563 | } |
| 564 | }; |
| 565 | |
| 566 | auto divide = [](int x, int y) -> expected<QR,E> { |
| 567 | if (y == 0) { |
| 568 | return unexpected(E("divide by zero", -1)); |
| 569 | } else { |
| 570 | return QR(x / y, x % y); |
| 571 | } |
| 572 | }; |
| 573 | |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 574 | EXPECT_FALSE(divide(10, 0).ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 575 | EXPECT_EQ("divide by zero", divide(10, 0).error().message); |
| 576 | EXPECT_EQ(-1, divide(10, 0).error().cause); |
| 577 | |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 578 | EXPECT_TRUE(divide(10, 3).ok()); |
Bernie Innocenti | 939d6a8 | 2020-02-03 23:54:02 +0900 | [diff] [blame] | 579 | EXPECT_EQ(QR(3, 1), *divide(10, 3)); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | TEST(Expected, testPair) { |
| 583 | auto test = [](bool yes) -> exp_pair { |
| 584 | if (yes) { |
| 585 | return exp_pair({"yes", 42}); |
| 586 | } else { |
| 587 | return unexpected(42); |
| 588 | } |
| 589 | }; |
| 590 | |
| 591 | auto r = test(true); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 592 | EXPECT_TRUE(r.ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 593 | EXPECT_EQ("yes", r->first); |
| 594 | } |
| 595 | |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 596 | TEST(Expected, testVoid) { |
| 597 | auto test = [](bool ok) -> exp_void { |
| 598 | if (ok) { |
| 599 | return {}; |
| 600 | } else { |
| 601 | return unexpected(10); |
| 602 | } |
| 603 | }; |
| 604 | |
| 605 | auto r = test(true); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 606 | EXPECT_TRUE(r.ok()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 607 | r = test(false); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 608 | EXPECT_FALSE(r.ok()); |
Jiyong Park | bdf42dc | 2019-06-05 18:33:01 +0900 | [diff] [blame] | 609 | EXPECT_EQ(10, r.error()); |
| 610 | } |
| 611 | |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 612 | // copied from result_test.cpp |
| 613 | struct ConstructorTracker { |
| 614 | static size_t constructor_called; |
| 615 | static size_t copy_constructor_called; |
| 616 | static size_t move_constructor_called; |
| 617 | static size_t copy_assignment_called; |
| 618 | static size_t move_assignment_called; |
| 619 | |
| 620 | template <typename T, |
| 621 | typename std::enable_if_t<std::is_convertible_v<T, std::string>>* = nullptr> |
| 622 | ConstructorTracker(T&& string) : string(string) { |
| 623 | ++constructor_called; |
| 624 | } |
| 625 | ConstructorTracker(const ConstructorTracker& ct) { |
| 626 | ++copy_constructor_called; |
| 627 | string = ct.string; |
| 628 | } |
| 629 | ConstructorTracker(ConstructorTracker&& ct) noexcept { |
| 630 | ++move_constructor_called; |
| 631 | string = std::move(ct.string); |
| 632 | } |
| 633 | ConstructorTracker& operator=(const ConstructorTracker& ct) { |
| 634 | ++copy_assignment_called; |
| 635 | string = ct.string; |
| 636 | return *this; |
| 637 | } |
| 638 | ConstructorTracker& operator=(ConstructorTracker&& ct) noexcept { |
| 639 | ++move_assignment_called; |
| 640 | string = std::move(ct.string); |
| 641 | return *this; |
| 642 | } |
| 643 | static void Reset() { |
| 644 | constructor_called = 0; |
| 645 | copy_constructor_called = 0; |
| 646 | move_constructor_called = 0; |
| 647 | copy_assignment_called = 0; |
| 648 | move_assignment_called = 0; |
| 649 | } |
| 650 | std::string string; |
| 651 | }; |
| 652 | |
| 653 | size_t ConstructorTracker::constructor_called = 0; |
| 654 | size_t ConstructorTracker::copy_constructor_called = 0; |
| 655 | size_t ConstructorTracker::move_constructor_called = 0; |
| 656 | size_t ConstructorTracker::copy_assignment_called = 0; |
| 657 | size_t ConstructorTracker::move_assignment_called = 0; |
| 658 | |
| 659 | typedef expected<ConstructorTracker, int> exp_track; |
| 660 | |
| 661 | TEST(Expected, testNumberOfCopies) { |
| 662 | // default constructor |
| 663 | ConstructorTracker::Reset(); |
| 664 | exp_track e("hello"); |
| 665 | EXPECT_EQ(1U, ConstructorTracker::constructor_called); |
| 666 | EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called); |
| 667 | EXPECT_EQ(0U, ConstructorTracker::move_constructor_called); |
| 668 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 669 | EXPECT_EQ(0U, ConstructorTracker::move_assignment_called); |
| 670 | |
| 671 | // copy constructor |
| 672 | ConstructorTracker::Reset(); |
| 673 | exp_track e2 = e; |
| 674 | EXPECT_EQ(0U, ConstructorTracker::constructor_called); |
| 675 | EXPECT_EQ(1U, ConstructorTracker::copy_constructor_called); |
| 676 | EXPECT_EQ(0U, ConstructorTracker::move_constructor_called); |
| 677 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 678 | EXPECT_EQ(0U, ConstructorTracker::move_assignment_called); |
| 679 | |
| 680 | // move constructor |
| 681 | ConstructorTracker::Reset(); |
| 682 | exp_track e3 = std::move(e); |
| 683 | EXPECT_EQ(0U, ConstructorTracker::constructor_called); |
| 684 | EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called); |
| 685 | EXPECT_EQ(1U, ConstructorTracker::move_constructor_called); |
| 686 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 687 | EXPECT_EQ(0U, ConstructorTracker::move_assignment_called); |
| 688 | |
| 689 | // construct from lvalue |
| 690 | ConstructorTracker::Reset(); |
| 691 | ConstructorTracker ct = "hello"; |
| 692 | exp_track e4(ct); |
| 693 | EXPECT_EQ(1U, ConstructorTracker::constructor_called); |
| 694 | EXPECT_EQ(1U, ConstructorTracker::copy_constructor_called); |
| 695 | EXPECT_EQ(0U, ConstructorTracker::move_constructor_called); |
| 696 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 697 | EXPECT_EQ(0U, ConstructorTracker::move_assignment_called); |
| 698 | |
| 699 | // construct from rvalue |
| 700 | ConstructorTracker::Reset(); |
| 701 | ConstructorTracker ct2 = "hello"; |
| 702 | exp_track e5(std::move(ct2)); |
| 703 | EXPECT_EQ(1U, ConstructorTracker::constructor_called); |
| 704 | EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called); |
| 705 | EXPECT_EQ(1U, ConstructorTracker::move_constructor_called); |
| 706 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 707 | EXPECT_EQ(0U, ConstructorTracker::move_assignment_called); |
| 708 | |
| 709 | // copy assignment |
| 710 | ConstructorTracker::Reset(); |
| 711 | exp_track e6 = "hello"; |
| 712 | exp_track e7 = "world"; |
| 713 | e7 = e6; |
| 714 | EXPECT_EQ(2U, ConstructorTracker::constructor_called); |
| 715 | EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called); |
| 716 | EXPECT_EQ(0U, ConstructorTracker::move_constructor_called); |
| 717 | EXPECT_EQ(1U, ConstructorTracker::copy_assignment_called); |
| 718 | EXPECT_EQ(0U, ConstructorTracker::move_assignment_called); |
| 719 | |
| 720 | // move assignment |
| 721 | ConstructorTracker::Reset(); |
| 722 | exp_track e8 = "hello"; |
| 723 | exp_track e9 = "world"; |
| 724 | e9 = std::move(e8); |
| 725 | EXPECT_EQ(2U, ConstructorTracker::constructor_called); |
| 726 | EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called); |
| 727 | EXPECT_EQ(0U, ConstructorTracker::move_constructor_called); |
| 728 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 729 | EXPECT_EQ(1U, ConstructorTracker::move_assignment_called); |
| 730 | |
| 731 | // swap |
| 732 | ConstructorTracker::Reset(); |
| 733 | exp_track e10 = "hello"; |
| 734 | exp_track e11 = "world"; |
| 735 | std::swap(e10, e11); |
| 736 | EXPECT_EQ(2U, ConstructorTracker::constructor_called); |
| 737 | EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called); |
| 738 | EXPECT_EQ(1U, ConstructorTracker::move_constructor_called); |
| 739 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 740 | EXPECT_EQ(2U, ConstructorTracker::move_assignment_called); |
| 741 | } |
| 742 | |
| 743 | TEST(Expected, testNoCopyOnReturn) { |
| 744 | auto test = [](const std::string& in) -> exp_track { |
| 745 | if (in.empty()) { |
| 746 | return "literal string"; |
| 747 | } |
| 748 | if (in == "test2") { |
| 749 | return ConstructorTracker(in + in + "2"); |
| 750 | } |
| 751 | ConstructorTracker result(in + " " + in); |
| 752 | return result; |
| 753 | }; |
| 754 | |
| 755 | ConstructorTracker::Reset(); |
| 756 | auto result1 = test(""); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 757 | ASSERT_TRUE(result1.ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 758 | EXPECT_EQ("literal string", result1->string); |
| 759 | EXPECT_EQ(1U, ConstructorTracker::constructor_called); |
| 760 | EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called); |
| 761 | EXPECT_EQ(0U, ConstructorTracker::move_constructor_called); |
| 762 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 763 | EXPECT_EQ(0U, ConstructorTracker::move_assignment_called); |
| 764 | |
| 765 | ConstructorTracker::Reset(); |
| 766 | auto result2 = test("test2"); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 767 | ASSERT_TRUE(result2.ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 768 | EXPECT_EQ("test2test22", result2->string); |
| 769 | EXPECT_EQ(1U, ConstructorTracker::constructor_called); |
| 770 | EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called); |
| 771 | EXPECT_EQ(1U, ConstructorTracker::move_constructor_called); |
| 772 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 773 | EXPECT_EQ(0U, ConstructorTracker::move_assignment_called); |
| 774 | |
| 775 | ConstructorTracker::Reset(); |
| 776 | auto result3 = test("test3"); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 777 | ASSERT_TRUE(result3.ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 778 | EXPECT_EQ("test3 test3", result3->string); |
| 779 | EXPECT_EQ(1U, ConstructorTracker::constructor_called); |
| 780 | EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called); |
| 781 | EXPECT_EQ(1U, ConstructorTracker::move_constructor_called); |
| 782 | EXPECT_EQ(0U, ConstructorTracker::copy_assignment_called); |
| 783 | EXPECT_EQ(0U, ConstructorTracker::move_assignment_called); |
| 784 | } |
| 785 | |
| 786 | TEST(Expected, testNested) { |
| 787 | expected<exp_string, std::string> e = "hello"; |
| 788 | |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 789 | EXPECT_TRUE(e.ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 790 | EXPECT_TRUE(e.has_value()); |
| 791 | EXPECT_TRUE(e.value().has_value()); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 792 | EXPECT_TRUE(e->ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 793 | EXPECT_EQ("hello", e.value().value()); |
| 794 | |
| 795 | expected<exp_string, std::string> e2 = unexpected("world"); |
| 796 | EXPECT_FALSE(e2.has_value()); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 797 | EXPECT_FALSE(e2.ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 798 | EXPECT_EQ("world", e2.error()); |
| 799 | |
| 800 | expected<exp_string, std::string> e3 = exp_string(unexpected("world")); |
| 801 | EXPECT_TRUE(e3.has_value()); |
| 802 | EXPECT_FALSE(e3.value().has_value()); |
Bernie Innocenti | 96912b1 | 2020-02-06 03:49:33 +0900 | [diff] [blame] | 803 | EXPECT_TRUE(e3.ok()); |
| 804 | EXPECT_FALSE(e3->ok()); |
Jiyong Park | de84d4a | 2019-05-15 19:17:48 +0900 | [diff] [blame] | 805 | EXPECT_EQ("world", e3.value().error()); |
| 806 | } |
| 807 | |
| 808 | constexpr bool equals(const char* a, const char* b) { |
| 809 | return (a == nullptr && b == nullptr) || |
| 810 | (a != nullptr && b != nullptr && *a == *b && |
| 811 | (*a == '\0' || equals(a + 1, b + 1))); |
| 812 | } |
| 813 | |
| 814 | TEST(Expected, testConstexpr) { |
| 815 | // Compliation error will occur if these expressions can't be |
| 816 | // evaluated at compile time |
| 817 | constexpr exp_int e(3); |
| 818 | constexpr exp_int::unexpected_type err(3); |
| 819 | constexpr int i = 4; |
| 820 | |
| 821 | // default constructor |
| 822 | static_assert(exp_int().value() == 0); |
| 823 | // copy constructor |
| 824 | static_assert(exp_int(e).value() == 3); |
| 825 | // move constructor |
| 826 | static_assert(exp_int(exp_int(4)).value() == 4); |
| 827 | // copy construct from value |
| 828 | static_assert(exp_int(i).value() == 4); |
| 829 | // copy construct from unexpected |
| 830 | static_assert(exp_int(err).error() == 3); |
| 831 | // move costruct from unexpected |
| 832 | static_assert(exp_int(unexpected(3)).error() == 3); |
| 833 | // observers |
| 834 | static_assert(*exp_int(3) == 3); |
| 835 | static_assert(exp_int(3).has_value() == true); |
| 836 | static_assert(exp_int(3).value_or(4) == 3); |
| 837 | |
| 838 | typedef expected<const char*, int> exp_s; |
| 839 | constexpr exp_s s("hello"); |
| 840 | constexpr const char* c = "hello"; |
| 841 | static_assert(equals(exp_s().value(), nullptr)); |
| 842 | static_assert(equals(exp_s(s).value(), "hello")); |
| 843 | static_assert(equals(exp_s(exp_s("hello")).value(), "hello")); |
| 844 | static_assert(equals(exp_s("hello").value(), "hello")); |
| 845 | static_assert(equals(exp_s(c).value(), "hello")); |
| 846 | } |
| 847 | |
| 848 | TEST(Expected, testWithNonConstructible) { |
| 849 | struct AssertNotConstructed { |
| 850 | AssertNotConstructed() = delete; |
| 851 | }; |
| 852 | |
| 853 | expected<int, AssertNotConstructed> v(42); |
| 854 | EXPECT_TRUE(v.has_value()); |
| 855 | EXPECT_EQ(42, v.value()); |
| 856 | |
| 857 | expected<AssertNotConstructed, int> e(unexpected(42)); |
| 858 | EXPECT_FALSE(e.has_value()); |
| 859 | EXPECT_EQ(42, e.error()); |
| 860 | } |
| 861 | |
| 862 | TEST(Expected, testWithMoveOnlyType) { |
| 863 | typedef expected<std::unique_ptr<int>,std::unique_ptr<int>> exp_ptr; |
| 864 | exp_ptr e(std::make_unique<int>(3)); |
| 865 | exp_ptr e2(unexpected(std::make_unique<int>(4))); |
| 866 | |
| 867 | EXPECT_TRUE(e.has_value()); |
| 868 | EXPECT_FALSE(e2.has_value()); |
| 869 | EXPECT_EQ(3, *(e.value())); |
| 870 | EXPECT_EQ(4, *(e2.error())); |
| 871 | |
| 872 | e2 = std::move(e); |
| 873 | EXPECT_TRUE(e.has_value()); |
| 874 | EXPECT_TRUE(e2.has_value()); |
| 875 | EXPECT_EQ(3, *(e2.value())); |
| 876 | } |