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29 | // |
30 | // Macros and functions for implementing parameterized tests |
31 | // in Google C++ Testing and Mocking Framework (Google Test) |
32 | // |
33 | // GOOGLETEST_CM0001 DO NOT DELETE |
34 | #ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_ |
35 | #define GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_ |
36 | |
37 | // Value-parameterized tests allow you to test your code with different |
38 | // parameters without writing multiple copies of the same test. |
39 | // |
40 | // Here is how you use value-parameterized tests: |
41 | |
42 | #if 0 |
43 | |
44 | // To write value-parameterized tests, first you should define a fixture |
45 | // class. It is usually derived from testing::TestWithParam<T> (see below for |
46 | // another inheritance scheme that's sometimes useful in more complicated |
47 | // class hierarchies), where the type of your parameter values. |
48 | // TestWithParam<T> is itself derived from testing::Test. T can be any |
49 | // copyable type. If it's a raw pointer, you are responsible for managing the |
50 | // lifespan of the pointed values. |
51 | |
52 | class FooTest : public ::testing::TestWithParam<const char*> { |
53 | // You can implement all the usual class fixture members here. |
54 | }; |
55 | |
56 | // Then, use the TEST_P macro to define as many parameterized tests |
57 | // for this fixture as you want. The _P suffix is for "parameterized" |
58 | // or "pattern", whichever you prefer to think. |
59 | |
60 | TEST_P(FooTest, DoesBlah) { |
61 | // Inside a test, access the test parameter with the GetParam() method |
62 | // of the TestWithParam<T> class: |
63 | EXPECT_TRUE(foo.Blah(GetParam())); |
64 | ... |
65 | } |
66 | |
67 | TEST_P(FooTest, HasBlahBlah) { |
68 | ... |
69 | } |
70 | |
71 | // Finally, you can use INSTANTIATE_TEST_SUITE_P to instantiate the test |
72 | // case with any set of parameters you want. Google Test defines a number |
73 | // of functions for generating test parameters. They return what we call |
74 | // (surprise!) parameter generators. Here is a summary of them, which |
75 | // are all in the testing namespace: |
76 | // |
77 | // |
78 | // Range(begin, end [, step]) - Yields values {begin, begin+step, |
79 | // begin+step+step, ...}. The values do not |
80 | // include end. step defaults to 1. |
81 | // Values(v1, v2, ..., vN) - Yields values {v1, v2, ..., vN}. |
82 | // ValuesIn(container) - Yields values from a C-style array, an STL |
83 | // ValuesIn(begin,end) container, or an iterator range [begin, end). |
84 | // Bool() - Yields sequence {false, true}. |
85 | // Combine(g1, g2, ..., gN) - Yields all combinations (the Cartesian product |
86 | // for the math savvy) of the values generated |
87 | // by the N generators. |
88 | // |
89 | // For more details, see comments at the definitions of these functions below |
90 | // in this file. |
91 | // |
92 | // The following statement will instantiate tests from the FooTest test suite |
93 | // each with parameter values "meeny", "miny", and "moe". |
94 | |
95 | INSTANTIATE_TEST_SUITE_P(InstantiationName, |
96 | FooTest, |
97 | Values("meeny" , "miny" , "moe" )); |
98 | |
99 | // To distinguish different instances of the pattern, (yes, you |
100 | // can instantiate it more than once) the first argument to the |
101 | // INSTANTIATE_TEST_SUITE_P macro is a prefix that will be added to the |
102 | // actual test suite name. Remember to pick unique prefixes for different |
103 | // instantiations. The tests from the instantiation above will have |
104 | // these names: |
105 | // |
106 | // * InstantiationName/FooTest.DoesBlah/0 for "meeny" |
107 | // * InstantiationName/FooTest.DoesBlah/1 for "miny" |
108 | // * InstantiationName/FooTest.DoesBlah/2 for "moe" |
109 | // * InstantiationName/FooTest.HasBlahBlah/0 for "meeny" |
110 | // * InstantiationName/FooTest.HasBlahBlah/1 for "miny" |
111 | // * InstantiationName/FooTest.HasBlahBlah/2 for "moe" |
112 | // |
113 | // You can use these names in --gtest_filter. |
114 | // |
115 | // This statement will instantiate all tests from FooTest again, each |
116 | // with parameter values "cat" and "dog": |
117 | |
118 | const char* pets[] = {"cat" , "dog" }; |
119 | INSTANTIATE_TEST_SUITE_P(AnotherInstantiationName, FooTest, ValuesIn(pets)); |
120 | |
121 | // The tests from the instantiation above will have these names: |
122 | // |
123 | // * AnotherInstantiationName/FooTest.DoesBlah/0 for "cat" |
124 | // * AnotherInstantiationName/FooTest.DoesBlah/1 for "dog" |
125 | // * AnotherInstantiationName/FooTest.HasBlahBlah/0 for "cat" |
126 | // * AnotherInstantiationName/FooTest.HasBlahBlah/1 for "dog" |
127 | // |
128 | // Please note that INSTANTIATE_TEST_SUITE_P will instantiate all tests |
129 | // in the given test suite, whether their definitions come before or |
130 | // AFTER the INSTANTIATE_TEST_SUITE_P statement. |
131 | // |
132 | // Please also note that generator expressions (including parameters to the |
133 | // generators) are evaluated in InitGoogleTest(), after main() has started. |
134 | // This allows the user on one hand, to adjust generator parameters in order |
135 | // to dynamically determine a set of tests to run and on the other hand, |
136 | // give the user a chance to inspect the generated tests with Google Test |
137 | // reflection API before RUN_ALL_TESTS() is executed. |
138 | // |
139 | // You can see samples/sample7_unittest.cc and samples/sample8_unittest.cc |
140 | // for more examples. |
141 | // |
142 | // In the future, we plan to publish the API for defining new parameter |
143 | // generators. But for now this interface remains part of the internal |
144 | // implementation and is subject to change. |
145 | // |
146 | // |
147 | // A parameterized test fixture must be derived from testing::Test and from |
148 | // testing::WithParamInterface<T>, where T is the type of the parameter |
149 | // values. Inheriting from TestWithParam<T> satisfies that requirement because |
150 | // TestWithParam<T> inherits from both Test and WithParamInterface. In more |
151 | // complicated hierarchies, however, it is occasionally useful to inherit |
152 | // separately from Test and WithParamInterface. For example: |
153 | |
154 | class BaseTest : public ::testing::Test { |
155 | // You can inherit all the usual members for a non-parameterized test |
156 | // fixture here. |
157 | }; |
158 | |
159 | class DerivedTest : public BaseTest, public ::testing::WithParamInterface<int> { |
160 | // The usual test fixture members go here too. |
161 | }; |
162 | |
163 | TEST_F(BaseTest, HasFoo) { |
164 | // This is an ordinary non-parameterized test. |
165 | } |
166 | |
167 | TEST_P(DerivedTest, DoesBlah) { |
168 | // GetParam works just the same here as if you inherit from TestWithParam. |
169 | EXPECT_TRUE(foo.Blah(GetParam())); |
170 | } |
171 | |
172 | #endif // 0 |
173 | |
174 | #include <iterator> |
175 | #include <utility> |
176 | |
177 | #include "gtest/internal/gtest-internal.h" |
178 | #include "gtest/internal/gtest-param-util.h" |
179 | #include "gtest/internal/gtest-port.h" |
180 | |
181 | namespace testing { |
182 | |
183 | // Functions producing parameter generators. |
184 | // |
185 | // Google Test uses these generators to produce parameters for value- |
186 | // parameterized tests. When a parameterized test suite is instantiated |
187 | // with a particular generator, Google Test creates and runs tests |
188 | // for each element in the sequence produced by the generator. |
189 | // |
190 | // In the following sample, tests from test suite FooTest are instantiated |
191 | // each three times with parameter values 3, 5, and 8: |
192 | // |
193 | // class FooTest : public TestWithParam<int> { ... }; |
194 | // |
195 | // TEST_P(FooTest, TestThis) { |
196 | // } |
197 | // TEST_P(FooTest, TestThat) { |
198 | // } |
199 | // INSTANTIATE_TEST_SUITE_P(TestSequence, FooTest, Values(3, 5, 8)); |
200 | // |
201 | |
202 | // Range() returns generators providing sequences of values in a range. |
203 | // |
204 | // Synopsis: |
205 | // Range(start, end) |
206 | // - returns a generator producing a sequence of values {start, start+1, |
207 | // start+2, ..., }. |
208 | // Range(start, end, step) |
209 | // - returns a generator producing a sequence of values {start, start+step, |
210 | // start+step+step, ..., }. |
211 | // Notes: |
212 | // * The generated sequences never include end. For example, Range(1, 5) |
213 | // returns a generator producing a sequence {1, 2, 3, 4}. Range(1, 9, 2) |
214 | // returns a generator producing {1, 3, 5, 7}. |
215 | // * start and end must have the same type. That type may be any integral or |
216 | // floating-point type or a user defined type satisfying these conditions: |
217 | // * It must be assignable (have operator=() defined). |
218 | // * It must have operator+() (operator+(int-compatible type) for |
219 | // two-operand version). |
220 | // * It must have operator<() defined. |
221 | // Elements in the resulting sequences will also have that type. |
222 | // * Condition start < end must be satisfied in order for resulting sequences |
223 | // to contain any elements. |
224 | // |
225 | template <typename T, typename IncrementT> |
226 | internal::ParamGenerator<T> Range(T start, T end, IncrementT step) { |
227 | return internal::ParamGenerator<T>( |
228 | new internal::RangeGenerator<T, IncrementT>(start, end, step)); |
229 | } |
230 | |
231 | template <typename T> |
232 | internal::ParamGenerator<T> Range(T start, T end) { |
233 | return Range(start, end, 1); |
234 | } |
235 | |
236 | // ValuesIn() function allows generation of tests with parameters coming from |
237 | // a container. |
238 | // |
239 | // Synopsis: |
240 | // ValuesIn(const T (&array)[N]) |
241 | // - returns a generator producing sequences with elements from |
242 | // a C-style array. |
243 | // ValuesIn(const Container& container) |
244 | // - returns a generator producing sequences with elements from |
245 | // an STL-style container. |
246 | // ValuesIn(Iterator begin, Iterator end) |
247 | // - returns a generator producing sequences with elements from |
248 | // a range [begin, end) defined by a pair of STL-style iterators. These |
249 | // iterators can also be plain C pointers. |
250 | // |
251 | // Please note that ValuesIn copies the values from the containers |
252 | // passed in and keeps them to generate tests in RUN_ALL_TESTS(). |
253 | // |
254 | // Examples: |
255 | // |
256 | // This instantiates tests from test suite StringTest |
257 | // each with C-string values of "foo", "bar", and "baz": |
258 | // |
259 | // const char* strings[] = {"foo", "bar", "baz"}; |
260 | // INSTANTIATE_TEST_SUITE_P(StringSequence, StringTest, ValuesIn(strings)); |
261 | // |
262 | // This instantiates tests from test suite StlStringTest |
263 | // each with STL strings with values "a" and "b": |
264 | // |
265 | // ::std::vector< ::std::string> GetParameterStrings() { |
266 | // ::std::vector< ::std::string> v; |
267 | // v.push_back("a"); |
268 | // v.push_back("b"); |
269 | // return v; |
270 | // } |
271 | // |
272 | // INSTANTIATE_TEST_SUITE_P(CharSequence, |
273 | // StlStringTest, |
274 | // ValuesIn(GetParameterStrings())); |
275 | // |
276 | // |
277 | // This will also instantiate tests from CharTest |
278 | // each with parameter values 'a' and 'b': |
279 | // |
280 | // ::std::list<char> GetParameterChars() { |
281 | // ::std::list<char> list; |
282 | // list.push_back('a'); |
283 | // list.push_back('b'); |
284 | // return list; |
285 | // } |
286 | // ::std::list<char> l = GetParameterChars(); |
287 | // INSTANTIATE_TEST_SUITE_P(CharSequence2, |
288 | // CharTest, |
289 | // ValuesIn(l.begin(), l.end())); |
290 | // |
291 | template <typename ForwardIterator> |
292 | internal::ParamGenerator< |
293 | typename std::iterator_traits<ForwardIterator>::value_type> |
294 | ValuesIn(ForwardIterator begin, ForwardIterator end) { |
295 | typedef typename std::iterator_traits<ForwardIterator>::value_type ParamType; |
296 | return internal::ParamGenerator<ParamType>( |
297 | new internal::ValuesInIteratorRangeGenerator<ParamType>(begin, end)); |
298 | } |
299 | |
300 | template <typename T, size_t N> |
301 | internal::ParamGenerator<T> ValuesIn(const T (&array)[N]) { |
302 | return ValuesIn(array, array + N); |
303 | } |
304 | |
305 | template <class Container> |
306 | internal::ParamGenerator<typename Container::value_type> ValuesIn( |
307 | const Container& container) { |
308 | return ValuesIn(container.begin(), container.end()); |
309 | } |
310 | |
311 | // Values() allows generating tests from explicitly specified list of |
312 | // parameters. |
313 | // |
314 | // Synopsis: |
315 | // Values(T v1, T v2, ..., T vN) |
316 | // - returns a generator producing sequences with elements v1, v2, ..., vN. |
317 | // |
318 | // For example, this instantiates tests from test suite BarTest each |
319 | // with values "one", "two", and "three": |
320 | // |
321 | // INSTANTIATE_TEST_SUITE_P(NumSequence, |
322 | // BarTest, |
323 | // Values("one", "two", "three")); |
324 | // |
325 | // This instantiates tests from test suite BazTest each with values 1, 2, 3.5. |
326 | // The exact type of values will depend on the type of parameter in BazTest. |
327 | // |
328 | // INSTANTIATE_TEST_SUITE_P(FloatingNumbers, BazTest, Values(1, 2, 3.5)); |
329 | // |
330 | // |
331 | template <typename... T> |
332 | internal::ValueArray<T...> Values(T... v) { |
333 | return internal::ValueArray<T...>(std::move(v)...); |
334 | } |
335 | |
336 | // Bool() allows generating tests with parameters in a set of (false, true). |
337 | // |
338 | // Synopsis: |
339 | // Bool() |
340 | // - returns a generator producing sequences with elements {false, true}. |
341 | // |
342 | // It is useful when testing code that depends on Boolean flags. Combinations |
343 | // of multiple flags can be tested when several Bool()'s are combined using |
344 | // Combine() function. |
345 | // |
346 | // In the following example all tests in the test suite FlagDependentTest |
347 | // will be instantiated twice with parameters false and true. |
348 | // |
349 | // class FlagDependentTest : public testing::TestWithParam<bool> { |
350 | // virtual void SetUp() { |
351 | // external_flag = GetParam(); |
352 | // } |
353 | // } |
354 | // INSTANTIATE_TEST_SUITE_P(BoolSequence, FlagDependentTest, Bool()); |
355 | // |
356 | inline internal::ParamGenerator<bool> Bool() { |
357 | return Values(false, true); |
358 | } |
359 | |
360 | // Combine() allows the user to combine two or more sequences to produce |
361 | // values of a Cartesian product of those sequences' elements. |
362 | // |
363 | // Synopsis: |
364 | // Combine(gen1, gen2, ..., genN) |
365 | // - returns a generator producing sequences with elements coming from |
366 | // the Cartesian product of elements from the sequences generated by |
367 | // gen1, gen2, ..., genN. The sequence elements will have a type of |
368 | // std::tuple<T1, T2, ..., TN> where T1, T2, ..., TN are the types |
369 | // of elements from sequences produces by gen1, gen2, ..., genN. |
370 | // |
371 | // Example: |
372 | // |
373 | // This will instantiate tests in test suite AnimalTest each one with |
374 | // the parameter values tuple("cat", BLACK), tuple("cat", WHITE), |
375 | // tuple("dog", BLACK), and tuple("dog", WHITE): |
376 | // |
377 | // enum Color { BLACK, GRAY, WHITE }; |
378 | // class AnimalTest |
379 | // : public testing::TestWithParam<std::tuple<const char*, Color> > {...}; |
380 | // |
381 | // TEST_P(AnimalTest, AnimalLooksNice) {...} |
382 | // |
383 | // INSTANTIATE_TEST_SUITE_P(AnimalVariations, AnimalTest, |
384 | // Combine(Values("cat", "dog"), |
385 | // Values(BLACK, WHITE))); |
386 | // |
387 | // This will instantiate tests in FlagDependentTest with all variations of two |
388 | // Boolean flags: |
389 | // |
390 | // class FlagDependentTest |
391 | // : public testing::TestWithParam<std::tuple<bool, bool> > { |
392 | // virtual void SetUp() { |
393 | // // Assigns external_flag_1 and external_flag_2 values from the tuple. |
394 | // std::tie(external_flag_1, external_flag_2) = GetParam(); |
395 | // } |
396 | // }; |
397 | // |
398 | // TEST_P(FlagDependentTest, TestFeature1) { |
399 | // // Test your code using external_flag_1 and external_flag_2 here. |
400 | // } |
401 | // INSTANTIATE_TEST_SUITE_P(TwoBoolSequence, FlagDependentTest, |
402 | // Combine(Bool(), Bool())); |
403 | // |
404 | template <typename... Generator> |
405 | internal::CartesianProductHolder<Generator...> Combine(const Generator&... g) { |
406 | return internal::CartesianProductHolder<Generator...>(g...); |
407 | } |
408 | |
409 | #define TEST_P(test_suite_name, test_name) \ |
410 | class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name) \ |
411 | : public test_suite_name { \ |
412 | public: \ |
413 | GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() {} \ |
414 | void TestBody() override; \ |
415 | \ |
416 | private: \ |
417 | static int AddToRegistry() { \ |
418 | ::testing::UnitTest::GetInstance() \ |
419 | ->parameterized_test_registry() \ |
420 | .GetTestSuitePatternHolder<test_suite_name>( \ |
421 | GTEST_STRINGIFY_(test_suite_name), \ |
422 | ::testing::internal::CodeLocation(__FILE__, __LINE__)) \ |
423 | ->AddTestPattern( \ |
424 | GTEST_STRINGIFY_(test_suite_name), GTEST_STRINGIFY_(test_name), \ |
425 | new ::testing::internal::TestMetaFactory<GTEST_TEST_CLASS_NAME_( \ |
426 | test_suite_name, test_name)>(), \ |
427 | ::testing::internal::CodeLocation(__FILE__, __LINE__)); \ |
428 | return 0; \ |
429 | } \ |
430 | static int gtest_registering_dummy_ GTEST_ATTRIBUTE_UNUSED_; \ |
431 | GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name, \ |
432 | test_name)); \ |
433 | }; \ |
434 | int GTEST_TEST_CLASS_NAME_(test_suite_name, \ |
435 | test_name)::gtest_registering_dummy_ = \ |
436 | GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::AddToRegistry(); \ |
437 | void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody() |
438 | |
439 | // The last argument to INSTANTIATE_TEST_SUITE_P allows the user to specify |
440 | // generator and an optional function or functor that generates custom test name |
441 | // suffixes based on the test parameters. Such a function or functor should |
442 | // accept one argument of type testing::TestParamInfo<class ParamType>, and |
443 | // return std::string. |
444 | // |
445 | // testing::PrintToStringParamName is a builtin test suffix generator that |
446 | // returns the value of testing::PrintToString(GetParam()). |
447 | // |
448 | // Note: test names must be non-empty, unique, and may only contain ASCII |
449 | // alphanumeric characters or underscore. Because PrintToString adds quotes |
450 | // to std::string and C strings, it won't work for these types. |
451 | |
452 | #define GTEST_EXPAND_(arg) arg |
453 | #define GTEST_GET_FIRST_(first, ...) first |
454 | #define GTEST_GET_SECOND_(first, second, ...) second |
455 | |
456 | #define INSTANTIATE_TEST_SUITE_P(prefix, test_suite_name, ...) \ |
457 | static ::testing::internal::ParamGenerator<test_suite_name::ParamType> \ |
458 | gtest_##prefix##test_suite_name##_EvalGenerator_() { \ |
459 | return GTEST_EXPAND_(GTEST_GET_FIRST_(__VA_ARGS__, DUMMY_PARAM_)); \ |
460 | } \ |
461 | static ::std::string gtest_##prefix##test_suite_name##_EvalGenerateName_( \ |
462 | const ::testing::TestParamInfo<test_suite_name::ParamType>& info) { \ |
463 | if (::testing::internal::AlwaysFalse()) { \ |
464 | ::testing::internal::TestNotEmpty(GTEST_EXPAND_(GTEST_GET_SECOND_( \ |
465 | __VA_ARGS__, \ |
466 | ::testing::internal::DefaultParamName<test_suite_name::ParamType>, \ |
467 | DUMMY_PARAM_))); \ |
468 | auto t = std::make_tuple(__VA_ARGS__); \ |
469 | static_assert(std::tuple_size<decltype(t)>::value <= 2, \ |
470 | "Too Many Args!"); \ |
471 | } \ |
472 | return ((GTEST_EXPAND_(GTEST_GET_SECOND_( \ |
473 | __VA_ARGS__, \ |
474 | ::testing::internal::DefaultParamName<test_suite_name::ParamType>, \ |
475 | DUMMY_PARAM_))))(info); \ |
476 | } \ |
477 | static int gtest_##prefix##test_suite_name##_dummy_ \ |
478 | GTEST_ATTRIBUTE_UNUSED_ = \ |
479 | ::testing::UnitTest::GetInstance() \ |
480 | ->parameterized_test_registry() \ |
481 | .GetTestSuitePatternHolder<test_suite_name>( \ |
482 | GTEST_STRINGIFY_(test_suite_name), \ |
483 | ::testing::internal::CodeLocation(__FILE__, __LINE__)) \ |
484 | ->AddTestSuiteInstantiation( \ |
485 | GTEST_STRINGIFY_(prefix), \ |
486 | >est_##prefix##test_suite_name##_EvalGenerator_, \ |
487 | >est_##prefix##test_suite_name##_EvalGenerateName_, \ |
488 | __FILE__, __LINE__) |
489 | |
490 | |
491 | // Allow Marking a Parameterized test class as not needing to be instantiated. |
492 | #define GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(T) \ |
493 | namespace gtest_do_not_use_outside_namespace_scope {} \ |
494 | static const ::testing::internal::MarkAsIgnored gtest_allow_ignore_##T( \ |
495 | GTEST_STRINGIFY_(T)) |
496 | |
497 | // Legacy API is deprecated but still available |
498 | #ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_ |
499 | #define INSTANTIATE_TEST_CASE_P \ |
500 | static_assert(::testing::internal::InstantiateTestCase_P_IsDeprecated(), \ |
501 | ""); \ |
502 | INSTANTIATE_TEST_SUITE_P |
503 | #endif // GTEST_REMOVE_LEGACY_TEST_CASEAPI_ |
504 | |
505 | } // namespace testing |
506 | |
507 | #endif // GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_ |
508 | |