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31 // Type and function utilities for implementing parameterized tests.
33 // GOOGLETEST_CM0001 DO NOT DELETE
35 #ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
36 #define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
45 #include <type_traits>
49 #include "gtest/internal/gtest-internal.h"
50 #include "gtest/internal/gtest-port.h"
51 #include "gtest/gtest-printers.h"
52 #include "gtest/gtest-test-part.h"
55 // Input to a parameterized test name generator, describing a test parameter.
56 // Consists of the parameter value and the integer parameter index.
57 template <class ParamType>
58 struct TestParamInfo {
59 TestParamInfo(const ParamType& a_param, size_t an_index) :
66 // A builtin parameterized test name generator which returns the result of
67 // testing::PrintToString.
68 struct PrintToStringParamName {
69 template <class ParamType>
70 std::string operator()(const TestParamInfo<ParamType>& info) const {
71 return PrintToString(info.param);
77 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
80 // Outputs a message explaining invalid registration of different
81 // fixture class for the same test suite. This may happen when
82 // TEST_P macro is used to define two tests with the same name
83 // but in different namespaces.
84 GTEST_API_ void ReportInvalidTestSuiteType(const char* test_suite_name,
85 CodeLocation code_location);
87 template <typename> class ParamGeneratorInterface;
88 template <typename> class ParamGenerator;
90 // Interface for iterating over elements provided by an implementation
91 // of ParamGeneratorInterface<T>.
93 class ParamIteratorInterface {
95 virtual ~ParamIteratorInterface() {}
96 // A pointer to the base generator instance.
97 // Used only for the purposes of iterator comparison
98 // to make sure that two iterators belong to the same generator.
99 virtual const ParamGeneratorInterface<T>* BaseGenerator() const = 0;
100 // Advances iterator to point to the next element
101 // provided by the generator. The caller is responsible
102 // for not calling Advance() on an iterator equal to
103 // BaseGenerator()->End().
104 virtual void Advance() = 0;
105 // Clones the iterator object. Used for implementing copy semantics
106 // of ParamIterator<T>.
107 virtual ParamIteratorInterface* Clone() const = 0;
108 // Dereferences the current iterator and provides (read-only) access
109 // to the pointed value. It is the caller's responsibility not to call
110 // Current() on an iterator equal to BaseGenerator()->End().
111 // Used for implementing ParamGenerator<T>::operator*().
112 virtual const T* Current() const = 0;
113 // Determines whether the given iterator and other point to the same
114 // element in the sequence generated by the generator.
115 // Used for implementing ParamGenerator<T>::operator==().
116 virtual bool Equals(const ParamIteratorInterface& other) const = 0;
119 // Class iterating over elements provided by an implementation of
120 // ParamGeneratorInterface<T>. It wraps ParamIteratorInterface<T>
121 // and implements the const forward iterator concept.
122 template <typename T>
123 class ParamIterator {
125 typedef T value_type;
126 typedef const T& reference;
127 typedef ptrdiff_t difference_type;
129 // ParamIterator assumes ownership of the impl_ pointer.
130 ParamIterator(const ParamIterator& other) : impl_(other.impl_->Clone()) {}
131 ParamIterator& operator=(const ParamIterator& other) {
133 impl_.reset(other.impl_->Clone());
137 const T& operator*() const { return *impl_->Current(); }
138 const T* operator->() const { return impl_->Current(); }
139 // Prefix version of operator++.
140 ParamIterator& operator++() {
144 // Postfix version of operator++.
145 ParamIterator operator++(int /*unused*/) {
146 ParamIteratorInterface<T>* clone = impl_->Clone();
148 return ParamIterator(clone);
150 bool operator==(const ParamIterator& other) const {
151 return impl_.get() == other.impl_.get() || impl_->Equals(*other.impl_);
153 bool operator!=(const ParamIterator& other) const {
154 return !(*this == other);
158 friend class ParamGenerator<T>;
159 explicit ParamIterator(ParamIteratorInterface<T>* impl) : impl_(impl) {}
160 std::unique_ptr<ParamIteratorInterface<T> > impl_;
163 // ParamGeneratorInterface<T> is the binary interface to access generators
164 // defined in other translation units.
165 template <typename T>
166 class ParamGeneratorInterface {
170 virtual ~ParamGeneratorInterface() {}
172 // Generator interface definition
173 virtual ParamIteratorInterface<T>* Begin() const = 0;
174 virtual ParamIteratorInterface<T>* End() const = 0;
177 // Wraps ParamGeneratorInterface<T> and provides general generator syntax
178 // compatible with the STL Container concept.
179 // This class implements copy initialization semantics and the contained
180 // ParamGeneratorInterface<T> instance is shared among all copies
181 // of the original object. This is possible because that instance is immutable.
183 class ParamGenerator {
185 typedef ParamIterator<T> iterator;
187 explicit ParamGenerator(ParamGeneratorInterface<T>* impl) : impl_(impl) {}
188 ParamGenerator(const ParamGenerator& other) : impl_(other.impl_) {}
190 ParamGenerator& operator=(const ParamGenerator& other) {
195 iterator begin() const { return iterator(impl_->Begin()); }
196 iterator end() const { return iterator(impl_->End()); }
199 std::shared_ptr<const ParamGeneratorInterface<T> > impl_;
202 // Generates values from a range of two comparable values. Can be used to
203 // generate sequences of user-defined types that implement operator+() and
205 // This class is used in the Range() function.
206 template <typename T, typename IncrementT>
207 class RangeGenerator : public ParamGeneratorInterface<T> {
209 RangeGenerator(T begin, T end, IncrementT step)
210 : begin_(begin), end_(end),
211 step_(step), end_index_(CalculateEndIndex(begin, end, step)) {}
212 ~RangeGenerator() override {}
214 ParamIteratorInterface<T>* Begin() const override {
215 return new Iterator(this, begin_, 0, step_);
217 ParamIteratorInterface<T>* End() const override {
218 return new Iterator(this, end_, end_index_, step_);
222 class Iterator : public ParamIteratorInterface<T> {
224 Iterator(const ParamGeneratorInterface<T>* base, T value, int index,
226 : base_(base), value_(value), index_(index), step_(step) {}
227 ~Iterator() override {}
229 const ParamGeneratorInterface<T>* BaseGenerator() const override {
232 void Advance() override {
233 value_ = static_cast<T>(value_ + step_);
236 ParamIteratorInterface<T>* Clone() const override {
237 return new Iterator(*this);
239 const T* Current() const override { return &value_; }
240 bool Equals(const ParamIteratorInterface<T>& other) const override {
241 // Having the same base generator guarantees that the other
242 // iterator is of the same type and we can downcast.
243 GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
244 << "The program attempted to compare iterators "
245 << "from different generators." << std::endl;
246 const int other_index =
247 CheckedDowncastToActualType<const Iterator>(&other)->index_;
248 return index_ == other_index;
252 Iterator(const Iterator& other)
253 : ParamIteratorInterface<T>(),
254 base_(other.base_), value_(other.value_), index_(other.index_),
255 step_(other.step_) {}
257 // No implementation - assignment is unsupported.
258 void operator=(const Iterator& other);
260 const ParamGeneratorInterface<T>* const base_;
263 const IncrementT step_;
264 }; // class RangeGenerator::Iterator
266 static int CalculateEndIndex(const T& begin,
268 const IncrementT& step) {
270 for (T i = begin; i < end; i = static_cast<T>(i + step))
275 // No implementation - assignment is unsupported.
276 void operator=(const RangeGenerator& other);
280 const IncrementT step_;
281 // The index for the end() iterator. All the elements in the generated
282 // sequence are indexed (0-based) to aid iterator comparison.
283 const int end_index_;
284 }; // class RangeGenerator
287 // Generates values from a pair of STL-style iterators. Used in the
288 // ValuesIn() function. The elements are copied from the source range
289 // since the source can be located on the stack, and the generator
290 // is likely to persist beyond that stack frame.
291 template <typename T>
292 class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
294 template <typename ForwardIterator>
295 ValuesInIteratorRangeGenerator(ForwardIterator begin, ForwardIterator end)
296 : container_(begin, end) {}
297 ~ValuesInIteratorRangeGenerator() override {}
299 ParamIteratorInterface<T>* Begin() const override {
300 return new Iterator(this, container_.begin());
302 ParamIteratorInterface<T>* End() const override {
303 return new Iterator(this, container_.end());
307 typedef typename ::std::vector<T> ContainerType;
309 class Iterator : public ParamIteratorInterface<T> {
311 Iterator(const ParamGeneratorInterface<T>* base,
312 typename ContainerType::const_iterator iterator)
313 : base_(base), iterator_(iterator) {}
314 ~Iterator() override {}
316 const ParamGeneratorInterface<T>* BaseGenerator() const override {
319 void Advance() override {
323 ParamIteratorInterface<T>* Clone() const override {
324 return new Iterator(*this);
326 // We need to use cached value referenced by iterator_ because *iterator_
327 // can return a temporary object (and of type other then T), so just
328 // having "return &*iterator_;" doesn't work.
329 // value_ is updated here and not in Advance() because Advance()
330 // can advance iterator_ beyond the end of the range, and we cannot
331 // detect that fact. The client code, on the other hand, is
332 // responsible for not calling Current() on an out-of-range iterator.
333 const T* Current() const override {
334 if (value_.get() == nullptr) value_.reset(new T(*iterator_));
337 bool Equals(const ParamIteratorInterface<T>& other) const override {
338 // Having the same base generator guarantees that the other
339 // iterator is of the same type and we can downcast.
340 GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
341 << "The program attempted to compare iterators "
342 << "from different generators." << std::endl;
344 CheckedDowncastToActualType<const Iterator>(&other)->iterator_;
348 Iterator(const Iterator& other)
349 // The explicit constructor call suppresses a false warning
350 // emitted by gcc when supplied with the -Wextra option.
351 : ParamIteratorInterface<T>(),
353 iterator_(other.iterator_) {}
355 const ParamGeneratorInterface<T>* const base_;
356 typename ContainerType::const_iterator iterator_;
357 // A cached value of *iterator_. We keep it here to allow access by
358 // pointer in the wrapping iterator's operator->().
359 // value_ needs to be mutable to be accessed in Current().
360 // Use of std::unique_ptr helps manage cached value's lifetime,
361 // which is bound by the lifespan of the iterator itself.
362 mutable std::unique_ptr<const T> value_;
363 }; // class ValuesInIteratorRangeGenerator::Iterator
365 // No implementation - assignment is unsupported.
366 void operator=(const ValuesInIteratorRangeGenerator& other);
368 const ContainerType container_;
369 }; // class ValuesInIteratorRangeGenerator
371 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
373 // Default parameterized test name generator, returns a string containing the
374 // integer test parameter index.
375 template <class ParamType>
376 std::string DefaultParamName(const TestParamInfo<ParamType>& info) {
378 name_stream << info.index;
379 return name_stream.GetString();
382 template <typename T = int>
383 void TestNotEmpty() {
384 static_assert(sizeof(T) == 0, "Empty arguments are not allowed.");
386 template <typename T = int>
387 void TestNotEmpty(const T&) {}
389 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
391 // Stores a parameter value and later creates tests parameterized with that
393 template <class TestClass>
394 class ParameterizedTestFactory : public TestFactoryBase {
396 typedef typename TestClass::ParamType ParamType;
397 explicit ParameterizedTestFactory(ParamType parameter) :
398 parameter_(parameter) {}
399 Test* CreateTest() override {
400 TestClass::SetParam(¶meter_);
401 return new TestClass();
405 const ParamType parameter_;
407 GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestFactory);
410 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
412 // TestMetaFactoryBase is a base class for meta-factories that create
413 // test factories for passing into MakeAndRegisterTestInfo function.
414 template <class ParamType>
415 class TestMetaFactoryBase {
417 virtual ~TestMetaFactoryBase() {}
419 virtual TestFactoryBase* CreateTestFactory(ParamType parameter) = 0;
422 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
424 // TestMetaFactory creates test factories for passing into
425 // MakeAndRegisterTestInfo function. Since MakeAndRegisterTestInfo receives
426 // ownership of test factory pointer, same factory object cannot be passed
427 // into that method twice. But ParameterizedTestSuiteInfo is going to call
428 // it for each Test/Parameter value combination. Thus it needs meta factory
430 template <class TestSuite>
431 class TestMetaFactory
432 : public TestMetaFactoryBase<typename TestSuite::ParamType> {
434 using ParamType = typename TestSuite::ParamType;
438 TestFactoryBase* CreateTestFactory(ParamType parameter) override {
439 return new ParameterizedTestFactory<TestSuite>(parameter);
443 GTEST_DISALLOW_COPY_AND_ASSIGN_(TestMetaFactory);
446 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
448 // ParameterizedTestSuiteInfoBase is a generic interface
449 // to ParameterizedTestSuiteInfo classes. ParameterizedTestSuiteInfoBase
450 // accumulates test information provided by TEST_P macro invocations
451 // and generators provided by INSTANTIATE_TEST_SUITE_P macro invocations
452 // and uses that information to register all resulting test instances
453 // in RegisterTests method. The ParameterizeTestSuiteRegistry class holds
454 // a collection of pointers to the ParameterizedTestSuiteInfo objects
455 // and calls RegisterTests() on each of them when asked.
456 class ParameterizedTestSuiteInfoBase {
458 virtual ~ParameterizedTestSuiteInfoBase() {}
460 // Base part of test suite name for display purposes.
461 virtual const std::string& GetTestSuiteName() const = 0;
462 // Test suite id to verify identity.
463 virtual TypeId GetTestSuiteTypeId() const = 0;
464 // UnitTest class invokes this method to register tests in this
465 // test suite right before running them in RUN_ALL_TESTS macro.
466 // This method should not be called more than once on any single
467 // instance of a ParameterizedTestSuiteInfoBase derived class.
468 virtual void RegisterTests() = 0;
471 ParameterizedTestSuiteInfoBase() {}
474 GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfoBase);
477 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
479 // Report a the name of a test_suit as safe to ignore
480 // as the side effect of construction of this type.
481 struct MarkAsIgnored {
482 explicit MarkAsIgnored(const char* test_suite);
485 GTEST_API_ void InsertSyntheticTestCase(const std::string& name,
486 CodeLocation location, bool has_test_p);
488 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
490 // ParameterizedTestSuiteInfo accumulates tests obtained from TEST_P
491 // macro invocations for a particular test suite and generators
492 // obtained from INSTANTIATE_TEST_SUITE_P macro invocations for that
493 // test suite. It registers tests with all values generated by all
494 // generators when asked.
495 template <class TestSuite>
496 class ParameterizedTestSuiteInfo : public ParameterizedTestSuiteInfoBase {
498 // ParamType and GeneratorCreationFunc are private types but are required
499 // for declarations of public methods AddTestPattern() and
500 // AddTestSuiteInstantiation().
501 using ParamType = typename TestSuite::ParamType;
502 // A function that returns an instance of appropriate generator type.
503 typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
504 using ParamNameGeneratorFunc = std::string(const TestParamInfo<ParamType>&);
506 explicit ParameterizedTestSuiteInfo(const char* name,
507 CodeLocation code_location)
508 : test_suite_name_(name), code_location_(code_location) {}
510 // Test suite base name for display purposes.
511 const std::string& GetTestSuiteName() const override {
512 return test_suite_name_;
514 // Test suite id to verify identity.
515 TypeId GetTestSuiteTypeId() const override { return GetTypeId<TestSuite>(); }
516 // TEST_P macro uses AddTestPattern() to record information
517 // about a single test in a LocalTestInfo structure.
518 // test_suite_name is the base name of the test suite (without invocation
519 // prefix). test_base_name is the name of an individual test without
520 // parameter index. For the test SequenceA/FooTest.DoBar/1 FooTest is
521 // test suite base name and DoBar is test base name.
522 void AddTestPattern(const char* test_suite_name, const char* test_base_name,
523 TestMetaFactoryBase<ParamType>* meta_factory,
524 CodeLocation code_location) {
525 tests_.push_back(std::shared_ptr<TestInfo>(new TestInfo(
526 test_suite_name, test_base_name, meta_factory, code_location)));
528 // INSTANTIATE_TEST_SUITE_P macro uses AddGenerator() to record information
529 // about a generator.
530 int AddTestSuiteInstantiation(const std::string& instantiation_name,
531 GeneratorCreationFunc* func,
532 ParamNameGeneratorFunc* name_func,
533 const char* file, int line) {
534 instantiations_.push_back(
535 InstantiationInfo(instantiation_name, func, name_func, file, line));
536 return 0; // Return value used only to run this method in namespace scope.
538 // UnitTest class invokes this method to register tests in this test suite
539 // right before running tests in RUN_ALL_TESTS macro.
540 // This method should not be called more than once on any single
541 // instance of a ParameterizedTestSuiteInfoBase derived class.
542 // UnitTest has a guard to prevent from calling this method more than once.
543 void RegisterTests() override {
544 bool generated_instantiations = false;
546 for (typename TestInfoContainer::iterator test_it = tests_.begin();
547 test_it != tests_.end(); ++test_it) {
548 std::shared_ptr<TestInfo> test_info = *test_it;
549 for (typename InstantiationContainer::iterator gen_it =
550 instantiations_.begin(); gen_it != instantiations_.end();
552 const std::string& instantiation_name = gen_it->name;
553 ParamGenerator<ParamType> generator((*gen_it->generator)());
554 ParamNameGeneratorFunc* name_func = gen_it->name_func;
555 const char* file = gen_it->file;
556 int line = gen_it->line;
558 std::string test_suite_name;
559 if ( !instantiation_name.empty() )
560 test_suite_name = instantiation_name + "/";
561 test_suite_name += test_info->test_suite_base_name;
564 std::set<std::string> test_param_names;
565 for (typename ParamGenerator<ParamType>::iterator param_it =
567 param_it != generator.end(); ++param_it, ++i) {
568 generated_instantiations = true;
570 Message test_name_stream;
572 std::string param_name = name_func(
573 TestParamInfo<ParamType>(*param_it, i));
575 GTEST_CHECK_(IsValidParamName(param_name))
576 << "Parameterized test name '" << param_name
577 << "' is invalid, in " << file
578 << " line " << line << std::endl;
580 GTEST_CHECK_(test_param_names.count(param_name) == 0)
581 << "Duplicate parameterized test name '" << param_name
582 << "', in " << file << " line " << line << std::endl;
584 test_param_names.insert(param_name);
586 if (!test_info->test_base_name.empty()) {
587 test_name_stream << test_info->test_base_name << "/";
589 test_name_stream << param_name;
590 MakeAndRegisterTestInfo(
591 test_suite_name.c_str(), test_name_stream.GetString().c_str(),
592 nullptr, // No type parameter.
593 PrintToString(*param_it).c_str(), test_info->code_location,
594 GetTestSuiteTypeId(),
595 SuiteApiResolver<TestSuite>::GetSetUpCaseOrSuite(file, line),
596 SuiteApiResolver<TestSuite>::GetTearDownCaseOrSuite(file, line),
597 test_info->test_meta_factory->CreateTestFactory(*param_it));
602 if (!generated_instantiations) {
603 // There are no generaotrs, or they all generate nothing ...
604 InsertSyntheticTestCase(GetTestSuiteName(), code_location_,
610 // LocalTestInfo structure keeps information about a single test registered
611 // with TEST_P macro.
613 TestInfo(const char* a_test_suite_base_name, const char* a_test_base_name,
614 TestMetaFactoryBase<ParamType>* a_test_meta_factory,
615 CodeLocation a_code_location)
616 : test_suite_base_name(a_test_suite_base_name),
617 test_base_name(a_test_base_name),
618 test_meta_factory(a_test_meta_factory),
619 code_location(a_code_location) {}
621 const std::string test_suite_base_name;
622 const std::string test_base_name;
623 const std::unique_ptr<TestMetaFactoryBase<ParamType> > test_meta_factory;
624 const CodeLocation code_location;
626 using TestInfoContainer = ::std::vector<std::shared_ptr<TestInfo> >;
627 // Records data received from INSTANTIATE_TEST_SUITE_P macros:
628 // <Instantiation name, Sequence generator creation function,
629 // Name generator function, Source file, Source line>
630 struct InstantiationInfo {
631 InstantiationInfo(const std::string &name_in,
632 GeneratorCreationFunc* generator_in,
633 ParamNameGeneratorFunc* name_func_in,
637 generator(generator_in),
638 name_func(name_func_in),
643 GeneratorCreationFunc* generator;
644 ParamNameGeneratorFunc* name_func;
648 typedef ::std::vector<InstantiationInfo> InstantiationContainer;
650 static bool IsValidParamName(const std::string& name) {
651 // Check for empty string
655 // Check for invalid characters
656 for (std::string::size_type index = 0; index < name.size(); ++index) {
657 if (!isalnum(name[index]) && name[index] != '_')
664 const std::string test_suite_name_;
665 CodeLocation code_location_;
666 TestInfoContainer tests_;
667 InstantiationContainer instantiations_;
669 GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfo);
670 }; // class ParameterizedTestSuiteInfo
672 // Legacy API is deprecated but still available
673 #ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
674 template <class TestCase>
675 using ParameterizedTestCaseInfo = ParameterizedTestSuiteInfo<TestCase>;
676 #endif // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
678 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
680 // ParameterizedTestSuiteRegistry contains a map of
681 // ParameterizedTestSuiteInfoBase classes accessed by test suite names. TEST_P
682 // and INSTANTIATE_TEST_SUITE_P macros use it to locate their corresponding
683 // ParameterizedTestSuiteInfo descriptors.
684 class ParameterizedTestSuiteRegistry {
686 ParameterizedTestSuiteRegistry() {}
687 ~ParameterizedTestSuiteRegistry() {
688 for (auto& test_suite_info : test_suite_infos_) {
689 delete test_suite_info;
693 // Looks up or creates and returns a structure containing information about
694 // tests and instantiations of a particular test suite.
695 template <class TestSuite>
696 ParameterizedTestSuiteInfo<TestSuite>* GetTestSuitePatternHolder(
697 const char* test_suite_name, CodeLocation code_location) {
698 ParameterizedTestSuiteInfo<TestSuite>* typed_test_info = nullptr;
699 for (auto& test_suite_info : test_suite_infos_) {
700 if (test_suite_info->GetTestSuiteName() == test_suite_name) {
701 if (test_suite_info->GetTestSuiteTypeId() != GetTypeId<TestSuite>()) {
702 // Complain about incorrect usage of Google Test facilities
703 // and terminate the program since we cannot guaranty correct
704 // test suite setup and tear-down in this case.
705 ReportInvalidTestSuiteType(test_suite_name, code_location);
708 // At this point we are sure that the object we found is of the same
709 // type we are looking for, so we downcast it to that type
710 // without further checks.
711 typed_test_info = CheckedDowncastToActualType<
712 ParameterizedTestSuiteInfo<TestSuite> >(test_suite_info);
717 if (typed_test_info == nullptr) {
718 typed_test_info = new ParameterizedTestSuiteInfo<TestSuite>(
719 test_suite_name, code_location);
720 test_suite_infos_.push_back(typed_test_info);
722 return typed_test_info;
724 void RegisterTests() {
725 for (auto& test_suite_info : test_suite_infos_) {
726 test_suite_info->RegisterTests();
729 // Legacy API is deprecated but still available
730 #ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
731 template <class TestCase>
732 ParameterizedTestCaseInfo<TestCase>* GetTestCasePatternHolder(
733 const char* test_case_name, CodeLocation code_location) {
734 return GetTestSuitePatternHolder<TestCase>(test_case_name, code_location);
737 #endif // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
740 using TestSuiteInfoContainer = ::std::vector<ParameterizedTestSuiteInfoBase*>;
742 TestSuiteInfoContainer test_suite_infos_;
744 GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteRegistry);
747 // Keep track of what type-parameterized test suite are defined and
748 // where as well as which are intatiated. This allows susequently
749 // identifying suits that are defined but never used.
750 class TypeParameterizedTestSuiteRegistry {
752 // Add a suite definition
753 void RegisterTestSuite(const char* test_suite_name,
754 CodeLocation code_location);
756 // Add an instantiation of a suit.
757 void RegisterInstantiation(const char* test_suite_name);
759 // For each suit repored as defined but not reported as instantiation,
760 // emit a test that reports that fact (configurably, as an error).
761 void CheckForInstantiations();
764 struct TypeParameterizedTestSuiteInfo {
765 explicit TypeParameterizedTestSuiteInfo(CodeLocation c)
766 : code_location(c), instantiated(false) {}
768 CodeLocation code_location;
772 std::map<std::string, TypeParameterizedTestSuiteInfo> suites_;
775 } // namespace internal
777 // Forward declarations of ValuesIn(), which is implemented in
778 // include/gtest/gtest-param-test.h.
779 template <class Container>
780 internal::ParamGenerator<typename Container::value_type> ValuesIn(
781 const Container& container);
784 // Used in the Values() function to provide polymorphic capabilities.
787 #pragma warning(push)
788 #pragma warning(disable : 4100)
791 template <typename... Ts>
794 explicit ValueArray(Ts... v) : v_(FlatTupleConstructTag{}, std::move(v)...) {}
796 template <typename T>
797 operator ParamGenerator<T>() const { // NOLINT
798 return ValuesIn(MakeVector<T>(MakeIndexSequence<sizeof...(Ts)>()));
802 template <typename T, size_t... I>
803 std::vector<T> MakeVector(IndexSequence<I...>) const {
804 return std::vector<T>{static_cast<T>(v_.template Get<I>())...};
814 template <typename... T>
815 class CartesianProductGenerator
816 : public ParamGeneratorInterface<::std::tuple<T...>> {
818 typedef ::std::tuple<T...> ParamType;
820 CartesianProductGenerator(const std::tuple<ParamGenerator<T>...>& g)
822 ~CartesianProductGenerator() override {}
824 ParamIteratorInterface<ParamType>* Begin() const override {
825 return new Iterator(this, generators_, false);
827 ParamIteratorInterface<ParamType>* End() const override {
828 return new Iterator(this, generators_, true);
834 template <size_t... I>
835 class IteratorImpl<IndexSequence<I...>>
836 : public ParamIteratorInterface<ParamType> {
838 IteratorImpl(const ParamGeneratorInterface<ParamType>* base,
839 const std::tuple<ParamGenerator<T>...>& generators, bool is_end)
841 begin_(std::get<I>(generators).begin()...),
842 end_(std::get<I>(generators).end()...),
843 current_(is_end ? end_ : begin_) {
844 ComputeCurrentValue();
846 ~IteratorImpl() override {}
848 const ParamGeneratorInterface<ParamType>* BaseGenerator() const override {
851 // Advance should not be called on beyond-of-range iterators
852 // so no component iterators must be beyond end of range, either.
853 void Advance() override {
855 // Advance the last iterator.
856 ++std::get<sizeof...(T) - 1>(current_);
857 // if that reaches end, propagate that up.
858 AdvanceIfEnd<sizeof...(T) - 1>();
859 ComputeCurrentValue();
861 ParamIteratorInterface<ParamType>* Clone() const override {
862 return new IteratorImpl(*this);
865 const ParamType* Current() const override { return current_value_.get(); }
867 bool Equals(const ParamIteratorInterface<ParamType>& other) const override {
868 // Having the same base generator guarantees that the other
869 // iterator is of the same type and we can downcast.
870 GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
871 << "The program attempted to compare iterators "
872 << "from different generators." << std::endl;
873 const IteratorImpl* typed_other =
874 CheckedDowncastToActualType<const IteratorImpl>(&other);
876 // We must report iterators equal if they both point beyond their
877 // respective ranges. That can happen in a variety of fashions,
878 // so we have to consult AtEnd().
879 if (AtEnd() && typed_other->AtEnd()) return true;
883 (same = same && std::get<I>(current_) ==
884 std::get<I>(typed_other->current_))...};
890 template <size_t ThisI>
891 void AdvanceIfEnd() {
892 if (std::get<ThisI>(current_) != std::get<ThisI>(end_)) return;
894 bool last = ThisI == 0;
896 // We are done. Nothing else to propagate.
900 constexpr size_t NextI = ThisI - (ThisI != 0);
901 std::get<ThisI>(current_) = std::get<ThisI>(begin_);
902 ++std::get<NextI>(current_);
903 AdvanceIfEnd<NextI>();
906 void ComputeCurrentValue() {
908 current_value_ = std::make_shared<ParamType>(*std::get<I>(current_)...);
913 (at_end = at_end || std::get<I>(current_) == std::get<I>(end_))...};
918 const ParamGeneratorInterface<ParamType>* const base_;
919 std::tuple<typename ParamGenerator<T>::iterator...> begin_;
920 std::tuple<typename ParamGenerator<T>::iterator...> end_;
921 std::tuple<typename ParamGenerator<T>::iterator...> current_;
922 std::shared_ptr<ParamType> current_value_;
925 using Iterator = IteratorImpl<typename MakeIndexSequence<sizeof...(T)>::type>;
927 std::tuple<ParamGenerator<T>...> generators_;
930 template <class... Gen>
931 class CartesianProductHolder {
933 CartesianProductHolder(const Gen&... g) : generators_(g...) {}
934 template <typename... T>
935 operator ParamGenerator<::std::tuple<T...>>() const {
936 return ParamGenerator<::std::tuple<T...>>(
937 new CartesianProductGenerator<T...>(generators_));
941 std::tuple<Gen...> generators_;
944 } // namespace internal
945 } // namespace testing
947 #endif // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_