ref: 3ccbd4803bcc75be860dd67bb3a56b114251433b
dir: /third_party/googletest/src/include/gtest/internal/gtest-param-util.h/
// Copyright 2008 Google Inc.
// All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Type and function utilities for implementing parameterized tests.
// GOOGLETEST_CM0001 DO NOT DELETE
#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
#include <ctype.h>
#include <cassert>
#include <iterator>
#include <memory>
#include <set>
#include <tuple>
#include <type_traits>
#include <utility>
#include <vector>
#include "gtest/internal/gtest-internal.h"
#include "gtest/internal/gtest-port.h"
#include "gtest/gtest-printers.h"
#include "gtest/gtest-test-part.h"
namespace testing {
// Input to a parameterized test name generator, describing a test parameter.
// Consists of the parameter value and the integer parameter index.
template <class ParamType>
struct TestParamInfo {
TestParamInfo(const ParamType& a_param, size_t an_index) :
param(a_param),
index(an_index) {}
ParamType param;
size_t index;
};
// A builtin parameterized test name generator which returns the result of
// testing::PrintToString.
struct PrintToStringParamName {
template <class ParamType>
std::string operator()(const TestParamInfo<ParamType>& info) const {
return PrintToString(info.param);
}
};
namespace internal {
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
// Utility Functions
// Outputs a message explaining invalid registration of different
// fixture class for the same test suite. This may happen when
// TEST_P macro is used to define two tests with the same name
// but in different namespaces.
GTEST_API_ void ReportInvalidTestSuiteType(const char* test_suite_name,
CodeLocation code_location);
template <typename> class ParamGeneratorInterface;
template <typename> class ParamGenerator;
// Interface for iterating over elements provided by an implementation
// of ParamGeneratorInterface<T>.
template <typename T>
class ParamIteratorInterface {
public:
virtual ~ParamIteratorInterface() {}
// A pointer to the base generator instance.
// Used only for the purposes of iterator comparison
// to make sure that two iterators belong to the same generator.
virtual const ParamGeneratorInterface<T>* BaseGenerator() const = 0;
// Advances iterator to point to the next element
// provided by the generator. The caller is responsible
// for not calling Advance() on an iterator equal to
// BaseGenerator()->End().
virtual void Advance() = 0;
// Clones the iterator object. Used for implementing copy semantics
// of ParamIterator<T>.
virtual ParamIteratorInterface* Clone() const = 0;
// Dereferences the current iterator and provides (read-only) access
// to the pointed value. It is the caller's responsibility not to call
// Current() on an iterator equal to BaseGenerator()->End().
// Used for implementing ParamGenerator<T>::operator*().
virtual const T* Current() const = 0;
// Determines whether the given iterator and other point to the same
// element in the sequence generated by the generator.
// Used for implementing ParamGenerator<T>::operator==().
virtual bool Equals(const ParamIteratorInterface& other) const = 0;
};
// Class iterating over elements provided by an implementation of
// ParamGeneratorInterface<T>. It wraps ParamIteratorInterface<T>
// and implements the const forward iterator concept.
template <typename T>
class ParamIterator {
public:
typedef T value_type;
typedef const T& reference;
typedef ptrdiff_t difference_type;
// ParamIterator assumes ownership of the impl_ pointer.
ParamIterator(const ParamIterator& other) : impl_(other.impl_->Clone()) {}
ParamIterator& operator=(const ParamIterator& other) {
if (this != &other)
impl_.reset(other.impl_->Clone());
return *this;
}
const T& operator*() const { return *impl_->Current(); }
const T* operator->() const { return impl_->Current(); }
// Prefix version of operator++.
ParamIterator& operator++() {
impl_->Advance();
return *this;
}
// Postfix version of operator++.
ParamIterator operator++(int /*unused*/) {
ParamIteratorInterface<T>* clone = impl_->Clone();
impl_->Advance();
return ParamIterator(clone);
}
bool operator==(const ParamIterator& other) const {
return impl_.get() == other.impl_.get() || impl_->Equals(*other.impl_);
}
bool operator!=(const ParamIterator& other) const {
return !(*this == other);
}
private:
friend class ParamGenerator<T>;
explicit ParamIterator(ParamIteratorInterface<T>* impl) : impl_(impl) {}
std::unique_ptr<ParamIteratorInterface<T> > impl_;
};
// ParamGeneratorInterface<T> is the binary interface to access generators
// defined in other translation units.
template <typename T>
class ParamGeneratorInterface {
public:
typedef T ParamType;
virtual ~ParamGeneratorInterface() {}
// Generator interface definition
virtual ParamIteratorInterface<T>* Begin() const = 0;
virtual ParamIteratorInterface<T>* End() const = 0;
};
// Wraps ParamGeneratorInterface<T> and provides general generator syntax
// compatible with the STL Container concept.
// This class implements copy initialization semantics and the contained
// ParamGeneratorInterface<T> instance is shared among all copies
// of the original object. This is possible because that instance is immutable.
template<typename T>
class ParamGenerator {
public:
typedef ParamIterator<T> iterator;
explicit ParamGenerator(ParamGeneratorInterface<T>* impl) : impl_(impl) {}
ParamGenerator(const ParamGenerator& other) : impl_(other.impl_) {}
ParamGenerator& operator=(const ParamGenerator& other) {
impl_ = other.impl_;
return *this;
}
iterator begin() const { return iterator(impl_->Begin()); }
iterator end() const { return iterator(impl_->End()); }
private:
std::shared_ptr<const ParamGeneratorInterface<T> > impl_;
};
// Generates values from a range of two comparable values. Can be used to
// generate sequences of user-defined types that implement operator+() and
// operator<().
// This class is used in the Range() function.
template <typename T, typename IncrementT>
class RangeGenerator : public ParamGeneratorInterface<T> {
public:
RangeGenerator(T begin, T end, IncrementT step)
: begin_(begin), end_(end),
step_(step), end_index_(CalculateEndIndex(begin, end, step)) {}
~RangeGenerator() override {}
ParamIteratorInterface<T>* Begin() const override {
return new Iterator(this, begin_, 0, step_);
}
ParamIteratorInterface<T>* End() const override {
return new Iterator(this, end_, end_index_, step_);
}
private:
class Iterator : public ParamIteratorInterface<T> {
public:
Iterator(const ParamGeneratorInterface<T>* base, T value, int index,
IncrementT step)
: base_(base), value_(value), index_(index), step_(step) {}
~Iterator() override {}
const ParamGeneratorInterface<T>* BaseGenerator() const override {
return base_;
}
void Advance() override {
value_ = static_cast<T>(value_ + step_);
index_++;
}
ParamIteratorInterface<T>* Clone() const override {
return new Iterator(*this);
}
const T* Current() const override { return &value_; }
bool Equals(const ParamIteratorInterface<T>& other) const override {
// Having the same base generator guarantees that the other
// iterator is of the same type and we can downcast.
GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
<< "The program attempted to compare iterators "
<< "from different generators." << std::endl;
const int other_index =
CheckedDowncastToActualType<const Iterator>(&other)->index_;
return index_ == other_index;
}
private:
Iterator(const Iterator& other)
: ParamIteratorInterface<T>(),
base_(other.base_), value_(other.value_), index_(other.index_),
step_(other.step_) {}
// No implementation - assignment is unsupported.
void operator=(const Iterator& other);
const ParamGeneratorInterface<T>* const base_;
T value_;
int index_;
const IncrementT step_;
}; // class RangeGenerator::Iterator
static int CalculateEndIndex(const T& begin,
const T& end,
const IncrementT& step) {
int end_index = 0;
for (T i = begin; i < end; i = static_cast<T>(i + step))
end_index++;
return end_index;
}
// No implementation - assignment is unsupported.
void operator=(const RangeGenerator& other);
const T begin_;
const T end_;
const IncrementT step_;
// The index for the end() iterator. All the elements in the generated
// sequence are indexed (0-based) to aid iterator comparison.
const int end_index_;
}; // class RangeGenerator
// Generates values from a pair of STL-style iterators. Used in the
// ValuesIn() function. The elements are copied from the source range
// since the source can be located on the stack, and the generator
// is likely to persist beyond that stack frame.
template <typename T>
class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
public:
template <typename ForwardIterator>
ValuesInIteratorRangeGenerator(ForwardIterator begin, ForwardIterator end)
: container_(begin, end) {}
~ValuesInIteratorRangeGenerator() override {}
ParamIteratorInterface<T>* Begin() const override {
return new Iterator(this, container_.begin());
}
ParamIteratorInterface<T>* End() const override {
return new Iterator(this, container_.end());
}
private:
typedef typename ::std::vector<T> ContainerType;
class Iterator : public ParamIteratorInterface<T> {
public:
Iterator(const ParamGeneratorInterface<T>* base,
typename ContainerType::const_iterator iterator)
: base_(base), iterator_(iterator) {}
~Iterator() override {}
const ParamGeneratorInterface<T>* BaseGenerator() const override {
return base_;
}
void Advance() override {
++iterator_;
value_.reset();
}
ParamIteratorInterface<T>* Clone() const override {
return new Iterator(*this);
}
// We need to use cached value referenced by iterator_ because *iterator_
// can return a temporary object (and of type other then T), so just
// having "return &*iterator_;" doesn't work.
// value_ is updated here and not in Advance() because Advance()
// can advance iterator_ beyond the end of the range, and we cannot
// detect that fact. The client code, on the other hand, is
// responsible for not calling Current() on an out-of-range iterator.
const T* Current() const override {
if (value_.get() == nullptr) value_.reset(new T(*iterator_));
return value_.get();
}
bool Equals(const ParamIteratorInterface<T>& other) const override {
// Having the same base generator guarantees that the other
// iterator is of the same type and we can downcast.
GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
<< "The program attempted to compare iterators "
<< "from different generators." << std::endl;
return iterator_ ==
CheckedDowncastToActualType<const Iterator>(&other)->iterator_;
}
private:
Iterator(const Iterator& other)
// The explicit constructor call suppresses a false warning
// emitted by gcc when supplied with the -Wextra option.
: ParamIteratorInterface<T>(),
base_(other.base_),
iterator_(other.iterator_) {}
const ParamGeneratorInterface<T>* const base_;
typename ContainerType::const_iterator iterator_;
// A cached value of *iterator_. We keep it here to allow access by
// pointer in the wrapping iterator's operator->().
// value_ needs to be mutable to be accessed in Current().
// Use of std::unique_ptr helps manage cached value's lifetime,
// which is bound by the lifespan of the iterator itself.
mutable std::unique_ptr<const T> value_;
}; // class ValuesInIteratorRangeGenerator::Iterator
// No implementation - assignment is unsupported.
void operator=(const ValuesInIteratorRangeGenerator& other);
const ContainerType container_;
}; // class ValuesInIteratorRangeGenerator
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// Default parameterized test name generator, returns a string containing the
// integer test parameter index.
template <class ParamType>
std::string DefaultParamName(const TestParamInfo<ParamType>& info) {
Message name_stream;
name_stream << info.index;
return name_stream.GetString();
}
template <typename T = int>
void TestNotEmpty() {
static_assert(sizeof(T) == 0, "Empty arguments are not allowed.");
}
template <typename T = int>
void TestNotEmpty(const T&) {}
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// Stores a parameter value and later creates tests parameterized with that
// value.
template <class TestClass>
class ParameterizedTestFactory : public TestFactoryBase {
public:
typedef typename TestClass::ParamType ParamType;
explicit ParameterizedTestFactory(ParamType parameter) :
parameter_(parameter) {}
Test* CreateTest() override {
TestClass::SetParam(¶meter_);
return new TestClass();
}
private:
const ParamType parameter_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestFactory);
};
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// TestMetaFactoryBase is a base class for meta-factories that create
// test factories for passing into MakeAndRegisterTestInfo function.
template <class ParamType>
class TestMetaFactoryBase {
public:
virtual ~TestMetaFactoryBase() {}
virtual TestFactoryBase* CreateTestFactory(ParamType parameter) = 0;
};
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// TestMetaFactory creates test factories for passing into
// MakeAndRegisterTestInfo function. Since MakeAndRegisterTestInfo receives
// ownership of test factory pointer, same factory object cannot be passed
// into that method twice. But ParameterizedTestSuiteInfo is going to call
// it for each Test/Parameter value combination. Thus it needs meta factory
// creator class.
template <class TestSuite>
class TestMetaFactory
: public TestMetaFactoryBase<typename TestSuite::ParamType> {
public:
using ParamType = typename TestSuite::ParamType;
TestMetaFactory() {}
TestFactoryBase* CreateTestFactory(ParamType parameter) override {
return new ParameterizedTestFactory<TestSuite>(parameter);
}
private:
GTEST_DISALLOW_COPY_AND_ASSIGN_(TestMetaFactory);
};
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// ParameterizedTestSuiteInfoBase is a generic interface
// to ParameterizedTestSuiteInfo classes. ParameterizedTestSuiteInfoBase
// accumulates test information provided by TEST_P macro invocations
// and generators provided by INSTANTIATE_TEST_SUITE_P macro invocations
// and uses that information to register all resulting test instances
// in RegisterTests method. The ParameterizeTestSuiteRegistry class holds
// a collection of pointers to the ParameterizedTestSuiteInfo objects
// and calls RegisterTests() on each of them when asked.
class ParameterizedTestSuiteInfoBase {
public:
virtual ~ParameterizedTestSuiteInfoBase() {}
// Base part of test suite name for display purposes.
virtual const std::string& GetTestSuiteName() const = 0;
// Test case id to verify identity.
virtual TypeId GetTestSuiteTypeId() const = 0;
// UnitTest class invokes this method to register tests in this
// test suite right before running them in RUN_ALL_TESTS macro.
// This method should not be called more than once on any single
// instance of a ParameterizedTestSuiteInfoBase derived class.
virtual void RegisterTests() = 0;
protected:
ParameterizedTestSuiteInfoBase() {}
private:
GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfoBase);
};
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// Report a the name of a test_suit as safe to ignore
// as the side effect of construction of this type.
struct MarkAsIgnored {
explicit MarkAsIgnored(const char* test_suite);
};
GTEST_API_ void InsertSyntheticTestCase(const std::string& name,
CodeLocation location, bool has_test_p);
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// ParameterizedTestSuiteInfo accumulates tests obtained from TEST_P
// macro invocations for a particular test suite and generators
// obtained from INSTANTIATE_TEST_SUITE_P macro invocations for that
// test suite. It registers tests with all values generated by all
// generators when asked.
template <class TestSuite>
class ParameterizedTestSuiteInfo : public ParameterizedTestSuiteInfoBase {
public:
// ParamType and GeneratorCreationFunc are private types but are required
// for declarations of public methods AddTestPattern() and
// AddTestSuiteInstantiation().
using ParamType = typename TestSuite::ParamType;
// A function that returns an instance of appropriate generator type.
typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
using ParamNameGeneratorFunc = std::string(const TestParamInfo<ParamType>&);
explicit ParameterizedTestSuiteInfo(const char* name,
CodeLocation code_location)
: test_suite_name_(name), code_location_(code_location) {}
// Test case base name for display purposes.
const std::string& GetTestSuiteName() const override {
return test_suite_name_;
}
// Test case id to verify identity.
TypeId GetTestSuiteTypeId() const override { return GetTypeId<TestSuite>(); }
// TEST_P macro uses AddTestPattern() to record information
// about a single test in a LocalTestInfo structure.
// test_suite_name is the base name of the test suite (without invocation
// prefix). test_base_name is the name of an individual test without
// parameter index. For the test SequenceA/FooTest.DoBar/1 FooTest is
// test suite base name and DoBar is test base name.
void AddTestPattern(const char* test_suite_name, const char* test_base_name,
TestMetaFactoryBase<ParamType>* meta_factory) {
tests_.push_back(std::shared_ptr<TestInfo>(
new TestInfo(test_suite_name, test_base_name, meta_factory)));
}
// INSTANTIATE_TEST_SUITE_P macro uses AddGenerator() to record information
// about a generator.
int AddTestSuiteInstantiation(const std::string& instantiation_name,
GeneratorCreationFunc* func,
ParamNameGeneratorFunc* name_func,
const char* file, int line) {
instantiations_.push_back(
InstantiationInfo(instantiation_name, func, name_func, file, line));
return 0; // Return value used only to run this method in namespace scope.
}
// UnitTest class invokes this method to register tests in this test suite
// right before running tests in RUN_ALL_TESTS macro.
// This method should not be called more than once on any single
// instance of a ParameterizedTestSuiteInfoBase derived class.
// UnitTest has a guard to prevent from calling this method more than once.
void RegisterTests() override {
bool generated_instantiations = false;
for (typename TestInfoContainer::iterator test_it = tests_.begin();
test_it != tests_.end(); ++test_it) {
std::shared_ptr<TestInfo> test_info = *test_it;
for (typename InstantiationContainer::iterator gen_it =
instantiations_.begin(); gen_it != instantiations_.end();
++gen_it) {
const std::string& instantiation_name = gen_it->name;
ParamGenerator<ParamType> generator((*gen_it->generator)());
ParamNameGeneratorFunc* name_func = gen_it->name_func;
const char* file = gen_it->file;
int line = gen_it->line;
std::string test_suite_name;
if ( !instantiation_name.empty() )
test_suite_name = instantiation_name + "/";
test_suite_name += test_info->test_suite_base_name;
size_t i = 0;
std::set<std::string> test_param_names;
for (typename ParamGenerator<ParamType>::iterator param_it =
generator.begin();
param_it != generator.end(); ++param_it, ++i) {
generated_instantiations = true;
Message test_name_stream;
std::string param_name = name_func(
TestParamInfo<ParamType>(*param_it, i));
GTEST_CHECK_(IsValidParamName(param_name))
<< "Parameterized test name '" << param_name
<< "' is invalid, in " << file
<< " line " << line << std::endl;
GTEST_CHECK_(test_param_names.count(param_name) == 0)
<< "Duplicate parameterized test name '" << param_name
<< "', in " << file << " line " << line << std::endl;
test_param_names.insert(param_name);
if (!test_info->test_base_name.empty()) {
test_name_stream << test_info->test_base_name << "/";
}
test_name_stream << param_name;
MakeAndRegisterTestInfo(
test_suite_name.c_str(), test_name_stream.GetString().c_str(),
nullptr, // No type parameter.
PrintToString(*param_it).c_str(), code_location_,
GetTestSuiteTypeId(),
SuiteApiResolver<TestSuite>::GetSetUpCaseOrSuite(file, line),
SuiteApiResolver<TestSuite>::GetTearDownCaseOrSuite(file, line),
test_info->test_meta_factory->CreateTestFactory(*param_it));
} // for param_it
} // for gen_it
} // for test_it
if (!generated_instantiations) {
// There are no generaotrs, or they all generate nothing ...
InsertSyntheticTestCase(GetTestSuiteName(), code_location_,
!tests_.empty());
}
} // RegisterTests
private:
// LocalTestInfo structure keeps information about a single test registered
// with TEST_P macro.
struct TestInfo {
TestInfo(const char* a_test_suite_base_name, const char* a_test_base_name,
TestMetaFactoryBase<ParamType>* a_test_meta_factory)
: test_suite_base_name(a_test_suite_base_name),
test_base_name(a_test_base_name),
test_meta_factory(a_test_meta_factory) {}
const std::string test_suite_base_name;
const std::string test_base_name;
const std::unique_ptr<TestMetaFactoryBase<ParamType> > test_meta_factory;
};
using TestInfoContainer = ::std::vector<std::shared_ptr<TestInfo> >;
// Records data received from INSTANTIATE_TEST_SUITE_P macros:
// <Instantiation name, Sequence generator creation function,
// Name generator function, Source file, Source line>
struct InstantiationInfo {
InstantiationInfo(const std::string &name_in,
GeneratorCreationFunc* generator_in,
ParamNameGeneratorFunc* name_func_in,
const char* file_in,
int line_in)
: name(name_in),
generator(generator_in),
name_func(name_func_in),
file(file_in),
line(line_in) {}
std::string name;
GeneratorCreationFunc* generator;
ParamNameGeneratorFunc* name_func;
const char* file;
int line;
};
typedef ::std::vector<InstantiationInfo> InstantiationContainer;
static bool IsValidParamName(const std::string& name) {
// Check for empty string
if (name.empty())
return false;
// Check for invalid characters
for (std::string::size_type index = 0; index < name.size(); ++index) {
if (!isalnum(name[index]) && name[index] != '_')
return false;
}
return true;
}
const std::string test_suite_name_;
CodeLocation code_location_;
TestInfoContainer tests_;
InstantiationContainer instantiations_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfo);
}; // class ParameterizedTestSuiteInfo
// Legacy API is deprecated but still available
#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
template <class TestCase>
using ParameterizedTestCaseInfo = ParameterizedTestSuiteInfo<TestCase>;
#endif // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
//
// ParameterizedTestSuiteRegistry contains a map of
// ParameterizedTestSuiteInfoBase classes accessed by test suite names. TEST_P
// and INSTANTIATE_TEST_SUITE_P macros use it to locate their corresponding
// ParameterizedTestSuiteInfo descriptors.
class ParameterizedTestSuiteRegistry {
public:
ParameterizedTestSuiteRegistry() {}
~ParameterizedTestSuiteRegistry() {
for (auto& test_suite_info : test_suite_infos_) {
delete test_suite_info;
}
}
// Looks up or creates and returns a structure containing information about
// tests and instantiations of a particular test suite.
template <class TestSuite>
ParameterizedTestSuiteInfo<TestSuite>* GetTestSuitePatternHolder(
const char* test_suite_name, CodeLocation code_location) {
ParameterizedTestSuiteInfo<TestSuite>* typed_test_info = nullptr;
for (auto& test_suite_info : test_suite_infos_) {
if (test_suite_info->GetTestSuiteName() == test_suite_name) {
if (test_suite_info->GetTestSuiteTypeId() != GetTypeId<TestSuite>()) {
// Complain about incorrect usage of Google Test facilities
// and terminate the program since we cannot guaranty correct
// test suite setup and tear-down in this case.
ReportInvalidTestSuiteType(test_suite_name, code_location);
posix::Abort();
} else {
// At this point we are sure that the object we found is of the same
// type we are looking for, so we downcast it to that type
// without further checks.
typed_test_info = CheckedDowncastToActualType<
ParameterizedTestSuiteInfo<TestSuite> >(test_suite_info);
}
break;
}
}
if (typed_test_info == nullptr) {
typed_test_info = new ParameterizedTestSuiteInfo<TestSuite>(
test_suite_name, code_location);
test_suite_infos_.push_back(typed_test_info);
}
return typed_test_info;
}
void RegisterTests() {
for (auto& test_suite_info : test_suite_infos_) {
test_suite_info->RegisterTests();
}
}
// Legacy API is deprecated but still available
#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
template <class TestCase>
ParameterizedTestCaseInfo<TestCase>* GetTestCasePatternHolder(
const char* test_case_name, CodeLocation code_location) {
return GetTestSuitePatternHolder<TestCase>(test_case_name, code_location);
}
#endif // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
private:
using TestSuiteInfoContainer = ::std::vector<ParameterizedTestSuiteInfoBase*>;
TestSuiteInfoContainer test_suite_infos_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteRegistry);
};
// Keep track of what type-parameterized test suite are defined and
// where as well as which are intatiated. This allows susequently
// identifying suits that are defined but never used.
class TypeParameterizedTestSuiteRegistry {
public:
// Add a suite definition
void RegisterTestSuite(const char* test_suite_name,
CodeLocation code_location);
// Add an instantiation of a suit.
void RegisterInstantiation(const char* test_suite_name);
// For each suit repored as defined but not reported as instantiation,
// emit a test that reports that fact (configurably, as an error).
void CheckForInstantiations();
private:
struct TypeParameterizedTestSuiteInfo {
explicit TypeParameterizedTestSuiteInfo(CodeLocation c)
: code_location(c), instantiated(false) {}
CodeLocation code_location;
bool instantiated;
};
std::map<std::string, TypeParameterizedTestSuiteInfo> suites_;
};
} // namespace internal
// Forward declarations of ValuesIn(), which is implemented in
// include/gtest/gtest-param-test.h.
template <class Container>
internal::ParamGenerator<typename Container::value_type> ValuesIn(
const Container& container);
namespace internal {
// Used in the Values() function to provide polymorphic capabilities.
template <typename... Ts>
class ValueArray {
public:
ValueArray(Ts... v) : v_{std::move(v)...} {}
template <typename T>
operator ParamGenerator<T>() const { // NOLINT
return ValuesIn(MakeVector<T>(MakeIndexSequence<sizeof...(Ts)>()));
}
private:
template <typename T, size_t... I>
std::vector<T> MakeVector(IndexSequence<I...>) const {
return std::vector<T>{static_cast<T>(v_.template Get<I>())...};
}
FlatTuple<Ts...> v_;
};
template <typename... T>
class CartesianProductGenerator
: public ParamGeneratorInterface<::std::tuple<T...>> {
public:
typedef ::std::tuple<T...> ParamType;
CartesianProductGenerator(const std::tuple<ParamGenerator<T>...>& g)
: generators_(g) {}
~CartesianProductGenerator() override {}
ParamIteratorInterface<ParamType>* Begin() const override {
return new Iterator(this, generators_, false);
}
ParamIteratorInterface<ParamType>* End() const override {
return new Iterator(this, generators_, true);
}
private:
template <class I>
class IteratorImpl;
template <size_t... I>
class IteratorImpl<IndexSequence<I...>>
: public ParamIteratorInterface<ParamType> {
public:
IteratorImpl(const ParamGeneratorInterface<ParamType>* base,
const std::tuple<ParamGenerator<T>...>& generators, bool is_end)
: base_(base),
begin_(std::get<I>(generators).begin()...),
end_(std::get<I>(generators).end()...),
current_(is_end ? end_ : begin_) {
ComputeCurrentValue();
}
~IteratorImpl() override {}
const ParamGeneratorInterface<ParamType>* BaseGenerator() const override {
return base_;
}
// Advance should not be called on beyond-of-range iterators
// so no component iterators must be beyond end of range, either.
void Advance() override {
assert(!AtEnd());
// Advance the last iterator.
++std::get<sizeof...(T) - 1>(current_);
// if that reaches end, propagate that up.
AdvanceIfEnd<sizeof...(T) - 1>();
ComputeCurrentValue();
}
ParamIteratorInterface<ParamType>* Clone() const override {
return new IteratorImpl(*this);
}
const ParamType* Current() const override { return current_value_.get(); }
bool Equals(const ParamIteratorInterface<ParamType>& other) const override {
// Having the same base generator guarantees that the other
// iterator is of the same type and we can downcast.
GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
<< "The program attempted to compare iterators "
<< "from different generators." << std::endl;
const IteratorImpl* typed_other =
CheckedDowncastToActualType<const IteratorImpl>(&other);
// We must report iterators equal if they both point beyond their
// respective ranges. That can happen in a variety of fashions,
// so we have to consult AtEnd().
if (AtEnd() && typed_other->AtEnd()) return true;
bool same = true;
bool dummy[] = {
(same = same && std::get<I>(current_) ==
std::get<I>(typed_other->current_))...};
(void)dummy;
return same;
}
private:
template <size_t ThisI>
void AdvanceIfEnd() {
if (std::get<ThisI>(current_) != std::get<ThisI>(end_)) return;
bool last = ThisI == 0;
if (last) {
// We are done. Nothing else to propagate.
return;
}
constexpr size_t NextI = ThisI - (ThisI != 0);
std::get<ThisI>(current_) = std::get<ThisI>(begin_);
++std::get<NextI>(current_);
AdvanceIfEnd<NextI>();
}
void ComputeCurrentValue() {
if (!AtEnd())
current_value_ = std::make_shared<ParamType>(*std::get<I>(current_)...);
}
bool AtEnd() const {
bool at_end = false;
bool dummy[] = {
(at_end = at_end || std::get<I>(current_) == std::get<I>(end_))...};
(void)dummy;
return at_end;
}
const ParamGeneratorInterface<ParamType>* const base_;
std::tuple<typename ParamGenerator<T>::iterator...> begin_;
std::tuple<typename ParamGenerator<T>::iterator...> end_;
std::tuple<typename ParamGenerator<T>::iterator...> current_;
std::shared_ptr<ParamType> current_value_;
};
using Iterator = IteratorImpl<typename MakeIndexSequence<sizeof...(T)>::type>;
std::tuple<ParamGenerator<T>...> generators_;
};
template <class... Gen>
class CartesianProductHolder {
public:
CartesianProductHolder(const Gen&... g) : generators_(g...) {}
template <typename... T>
operator ParamGenerator<::std::tuple<T...>>() const {
return ParamGenerator<::std::tuple<T...>>(
new CartesianProductGenerator<T...>(generators_));
}
private:
std::tuple<Gen...> generators_;
};
} // namespace internal
} // namespace testing
#endif // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_