1 // Copyright 2005, Google Inc.
2 // All rights reserved.
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are
8 // * Redistributions of source code must retain the above copyright
9 // notice, this list of conditions and the following disclaimer.
10 // * Redistributions in binary form must reproduce the above
11 // copyright notice, this list of conditions and the following disclaimer
12 // in the documentation and/or other materials provided with the
14 // * Neither the name of Google Inc. nor the names of its
15 // contributors may be used to endorse or promote products derived from
16 // this software without specific prior written permission.
18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 // Authors: wan@google.com (Zhanyong Wan), eefacm@gmail.com (Sean Mcafee)
32 // The Google C++ Testing Framework (Google Test)
34 // This header file declares functions and macros used internally by
35 // Google Test. They are subject to change without notice.
37 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
38 #define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
40 #include "gtest/internal/gtest-port.h"
44 # include <sys/types.h>
45 # include <sys/wait.h>
47 #endif // GTEST_OS_LINUX
55 #include "gtest/internal/gtest-string.h"
56 #include "gtest/internal/gtest-filepath.h"
57 #include "gtest/internal/gtest-type-util.h"
59 #include "llvm/Support/raw_os_ostream.h"
61 // Due to C++ preprocessor weirdness, we need double indirection to
62 // concatenate two tokens when one of them is __LINE__. Writing
66 // will result in the token foo__LINE__, instead of foo followed by
67 // the current line number. For more details, see
68 // http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-39.6
69 #define GTEST_CONCAT_TOKEN_(foo, bar) GTEST_CONCAT_TOKEN_IMPL_(foo, bar)
70 #define GTEST_CONCAT_TOKEN_IMPL_(foo, bar) foo ## bar
72 // Google Test defines the testing::Message class to allow construction of
73 // test messages via the << operator. The idea is that anything
74 // streamable to std::ostream can be streamed to a testing::Message.
75 // This allows a user to use his own types in Google Test assertions by
76 // overloading the << operator.
78 // util/gtl/stl_logging-inl.h overloads << for STL containers. These
79 // overloads cannot be defined in the std namespace, as that will be
80 // undefined behavior. Therefore, they are defined in the global
83 // C++'s symbol lookup rule (i.e. Koenig lookup) says that these
84 // overloads are visible in either the std namespace or the global
85 // namespace, but not other namespaces, including the testing
86 // namespace which Google Test's Message class is in.
88 // To allow STL containers (and other types that has a << operator
89 // defined in the global namespace) to be used in Google Test assertions,
90 // testing::Message must access the custom << operator from the global
91 // namespace. Hence this helper function.
93 // Note: Jeffrey Yasskin suggested an alternative fix by "using
94 // ::operator<<;" in the definition of Message's operator<<. That fix
95 // doesn't require a helper function, but unfortunately doesn't
98 // LLVM INTERNAL CHANGE: To allow operator<< to work with both
99 // std::ostreams and LLVM's raw_ostreams, we define a special
100 // std::ostream with an implicit conversion to raw_ostream& and stream
101 // to that. This causes the compiler to prefer std::ostream overloads
102 // but still find raw_ostream& overloads.
104 class convertible_fwd_ostream : public std::ostream {
109 convertible_fwd_ostream(std::ostream& os)
110 : std::ostream(os.rdbuf()), os_(os), ros_(*this) {}
111 operator raw_ostream&() { return ros_; }
114 template <typename T>
115 inline void GTestStreamToHelper(std::ostream* os, const T& val) {
116 llvm::convertible_fwd_ostream cos(*os);
120 class ProtocolMessage;
121 namespace proto2 { class Message; }
125 // Forward declarations.
127 class AssertionResult; // Result of an assertion.
128 class Message; // Represents a failure message.
129 class Test; // Represents a test.
130 class TestInfo; // Information about a test.
131 class TestPartResult; // Result of a test part.
132 class UnitTest; // A collection of test cases.
134 template <typename T>
135 ::std::string PrintToString(const T& value);
139 struct TraceInfo; // Information about a trace point.
140 class ScopedTrace; // Implements scoped trace.
141 class TestInfoImpl; // Opaque implementation of TestInfo
142 class UnitTestImpl; // Opaque implementation of UnitTest
144 // How many times InitGoogleTest() has been called.
145 extern int g_init_gtest_count;
147 // The text used in failure messages to indicate the start of the
149 GTEST_API_ extern const char kStackTraceMarker[];
151 // A secret type that Google Test users don't know about. It has no
152 // definition on purpose. Therefore it's impossible to create a
153 // Secret object, which is what we want.
156 // Two overloaded helpers for checking at compile time whether an
157 // expression is a null pointer literal (i.e. NULL or any 0-valued
158 // compile-time integral constant). Their return values have
159 // different sizes, so we can use sizeof() to test which version is
160 // picked by the compiler. These helpers have no implementations, as
161 // we only need their signatures.
163 // Given IsNullLiteralHelper(x), the compiler will pick the first
164 // version if x can be implicitly converted to Secret*, and pick the
165 // second version otherwise. Since Secret is a secret and incomplete
166 // type, the only expression a user can write that has type Secret* is
167 // a null pointer literal. Therefore, we know that x is a null
168 // pointer literal if and only if the first version is picked by the
170 char IsNullLiteralHelper(Secret* p);
171 char (&IsNullLiteralHelper(...))[2]; // NOLINT
173 // A compile-time bool constant that is true if and only if x is a
174 // null pointer literal (i.e. NULL or any 0-valued compile-time
175 // integral constant).
176 #ifdef GTEST_ELLIPSIS_NEEDS_POD_
177 // We lose support for NULL detection where the compiler doesn't like
178 // passing non-POD classes through ellipsis (...).
179 # define GTEST_IS_NULL_LITERAL_(x) false
181 # define GTEST_IS_NULL_LITERAL_(x) \
182 (sizeof(::testing::internal::IsNullLiteralHelper(x)) == 1)
183 #endif // GTEST_ELLIPSIS_NEEDS_POD_
185 // Appends the user-supplied message to the Google-Test-generated message.
186 GTEST_API_ String AppendUserMessage(const String& gtest_msg,
187 const Message& user_msg);
189 // A helper class for creating scoped traces in user programs.
190 class GTEST_API_ ScopedTrace {
192 // The c'tor pushes the given source file location and message onto
193 // a trace stack maintained by Google Test.
194 ScopedTrace(const char* file, int line, const Message& message);
196 // The d'tor pops the info pushed by the c'tor.
198 // Note that the d'tor is not virtual in order to be efficient.
199 // Don't inherit from ScopedTrace!
203 GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedTrace);
204 } GTEST_ATTRIBUTE_UNUSED_; // A ScopedTrace object does its job in its
205 // c'tor and d'tor. Therefore it doesn't
206 // need to be used otherwise.
208 // Converts a streamable value to a String. A NULL pointer is
209 // converted to "(null)". When the input value is a ::string,
210 // ::std::string, ::wstring, or ::std::wstring object, each NUL
211 // character in it is replaced with "\\0".
212 // Declared here but defined in gtest.h, so that it has access
213 // to the definition of the Message class, required by the ARM
215 template <typename T>
216 String StreamableToString(const T& streamable);
218 // The Symbian compiler has a bug that prevents it from selecting the
219 // correct overload of FormatForComparisonFailureMessage (see below)
220 // unless we pass the first argument by reference. If we do that,
221 // however, Visual Age C++ 10.1 generates a compiler error. Therefore
222 // we only apply the work-around for Symbian.
223 #if defined(__SYMBIAN32__)
224 # define GTEST_CREF_WORKAROUND_ const&
226 # define GTEST_CREF_WORKAROUND_
229 // When this operand is a const char* or char*, if the other operand
230 // is a ::std::string or ::string, we print this operand as a C string
231 // rather than a pointer (we do the same for wide strings); otherwise
232 // we print it as a pointer to be safe.
234 // This internal macro is used to avoid duplicated code.
235 #define GTEST_FORMAT_IMPL_(operand2_type, operand1_printer)\
236 inline String FormatForComparisonFailureMessage(\
237 operand2_type::value_type* GTEST_CREF_WORKAROUND_ str, \
238 const operand2_type& /*operand2*/) {\
239 return operand1_printer(str);\
241 inline String FormatForComparisonFailureMessage(\
242 const operand2_type::value_type* GTEST_CREF_WORKAROUND_ str, \
243 const operand2_type& /*operand2*/) {\
244 return operand1_printer(str);\
247 GTEST_FORMAT_IMPL_(::std::string, String::ShowCStringQuoted)
248 #if GTEST_HAS_STD_WSTRING
249 GTEST_FORMAT_IMPL_(::std::wstring, String::ShowWideCStringQuoted)
250 #endif // GTEST_HAS_STD_WSTRING
252 #if GTEST_HAS_GLOBAL_STRING
253 GTEST_FORMAT_IMPL_(::string, String::ShowCStringQuoted)
254 #endif // GTEST_HAS_GLOBAL_STRING
255 #if GTEST_HAS_GLOBAL_WSTRING
256 GTEST_FORMAT_IMPL_(::wstring, String::ShowWideCStringQuoted)
257 #endif // GTEST_HAS_GLOBAL_WSTRING
259 #undef GTEST_FORMAT_IMPL_
261 // The next four overloads handle the case where the operand being
262 // printed is a char/wchar_t pointer and the other operand is not a
263 // string/wstring object. In such cases, we just print the operand as
264 // a pointer to be safe.
265 #define GTEST_FORMAT_CHAR_PTR_IMPL_(CharType) \
266 template <typename T> \
267 String FormatForComparisonFailureMessage(CharType* GTEST_CREF_WORKAROUND_ p, \
269 return PrintToString(static_cast<const void*>(p)); \
272 GTEST_FORMAT_CHAR_PTR_IMPL_(char)
273 GTEST_FORMAT_CHAR_PTR_IMPL_(const char)
274 GTEST_FORMAT_CHAR_PTR_IMPL_(wchar_t)
275 GTEST_FORMAT_CHAR_PTR_IMPL_(const wchar_t)
277 #undef GTEST_FORMAT_CHAR_PTR_IMPL_
279 // Constructs and returns the message for an equality assertion
280 // (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
282 // The first four parameters are the expressions used in the assertion
283 // and their values, as strings. For example, for ASSERT_EQ(foo, bar)
284 // where foo is 5 and bar is 6, we have:
286 // expected_expression: "foo"
287 // actual_expression: "bar"
288 // expected_value: "5"
291 // The ignoring_case parameter is true iff the assertion is a
292 // *_STRCASEEQ*. When it's true, the string " (ignoring case)" will
293 // be inserted into the message.
294 GTEST_API_ AssertionResult EqFailure(const char* expected_expression,
295 const char* actual_expression,
296 const String& expected_value,
297 const String& actual_value,
300 // Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
301 GTEST_API_ String GetBoolAssertionFailureMessage(
302 const AssertionResult& assertion_result,
303 const char* expression_text,
304 const char* actual_predicate_value,
305 const char* expected_predicate_value);
307 // This template class represents an IEEE floating-point number
308 // (either single-precision or double-precision, depending on the
309 // template parameters).
311 // The purpose of this class is to do more sophisticated number
312 // comparison. (Due to round-off error, etc, it's very unlikely that
313 // two floating-points will be equal exactly. Hence a naive
314 // comparison by the == operation often doesn't work.)
316 // Format of IEEE floating-point:
318 // The most-significant bit being the leftmost, an IEEE
319 // floating-point looks like
321 // sign_bit exponent_bits fraction_bits
323 // Here, sign_bit is a single bit that designates the sign of the
326 // For float, there are 8 exponent bits and 23 fraction bits.
328 // For double, there are 11 exponent bits and 52 fraction bits.
330 // More details can be found at
331 // http://en.wikipedia.org/wiki/IEEE_floating-point_standard.
333 // Template parameter:
335 // RawType: the raw floating-point type (either float or double)
336 template <typename RawType>
337 class FloatingPoint {
339 // Defines the unsigned integer type that has the same size as the
340 // floating point number.
341 typedef typename TypeWithSize<sizeof(RawType)>::UInt Bits;
345 // # of bits in a number.
346 static const size_t kBitCount = 8*sizeof(RawType);
348 // # of fraction bits in a number.
349 static const size_t kFractionBitCount =
350 std::numeric_limits<RawType>::digits - 1;
352 // # of exponent bits in a number.
353 static const size_t kExponentBitCount = kBitCount - 1 - kFractionBitCount;
355 // The mask for the sign bit.
356 static const Bits kSignBitMask = static_cast<Bits>(1) << (kBitCount - 1);
358 // The mask for the fraction bits.
359 static const Bits kFractionBitMask =
360 ~static_cast<Bits>(0) >> (kExponentBitCount + 1);
362 // The mask for the exponent bits.
363 static const Bits kExponentBitMask = ~(kSignBitMask | kFractionBitMask);
365 // How many ULP's (Units in the Last Place) we want to tolerate when
366 // comparing two numbers. The larger the value, the more error we
367 // allow. A 0 value means that two numbers must be exactly the same
368 // to be considered equal.
370 // The maximum error of a single floating-point operation is 0.5
371 // units in the last place. On Intel CPU's, all floating-point
372 // calculations are done with 80-bit precision, while double has 64
373 // bits. Therefore, 4 should be enough for ordinary use.
375 // See the following article for more details on ULP:
376 // http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm.
377 static const size_t kMaxUlps = 4;
379 // Constructs a FloatingPoint from a raw floating-point number.
381 // On an Intel CPU, passing a non-normalized NAN (Not a Number)
382 // around may change its bits, although the new value is guaranteed
383 // to be also a NAN. Therefore, don't expect this constructor to
384 // preserve the bits in x when x is a NAN.
385 explicit FloatingPoint(const RawType& x) { u_.value_ = x; }
389 // Reinterprets a bit pattern as a floating-point number.
391 // This function is needed to test the AlmostEquals() method.
392 static RawType ReinterpretBits(const Bits bits) {
398 // Returns the floating-point number that represent positive infinity.
399 static RawType Infinity() {
400 return ReinterpretBits(kExponentBitMask);
403 // Non-static methods
405 // Returns the bits that represents this number.
406 const Bits &bits() const { return u_.bits_; }
408 // Returns the exponent bits of this number.
409 Bits exponent_bits() const { return kExponentBitMask & u_.bits_; }
411 // Returns the fraction bits of this number.
412 Bits fraction_bits() const { return kFractionBitMask & u_.bits_; }
414 // Returns the sign bit of this number.
415 Bits sign_bit() const { return kSignBitMask & u_.bits_; }
417 // Returns true iff this is NAN (not a number).
418 bool is_nan() const {
419 // It's a NAN if the exponent bits are all ones and the fraction
420 // bits are not entirely zeros.
421 return (exponent_bits() == kExponentBitMask) && (fraction_bits() != 0);
424 // Returns true iff this number is at most kMaxUlps ULP's away from
425 // rhs. In particular, this function:
427 // - returns false if either number is (or both are) NAN.
428 // - treats really large numbers as almost equal to infinity.
429 // - thinks +0.0 and -0.0 are 0 DLP's apart.
430 bool AlmostEquals(const FloatingPoint& rhs) const {
431 // The IEEE standard says that any comparison operation involving
432 // a NAN must return false.
433 if (is_nan() || rhs.is_nan()) return false;
435 return DistanceBetweenSignAndMagnitudeNumbers(u_.bits_, rhs.u_.bits_)
440 // The data type used to store the actual floating-point number.
441 union FloatingPointUnion {
442 RawType value_; // The raw floating-point number.
443 Bits bits_; // The bits that represent the number.
446 // Converts an integer from the sign-and-magnitude representation to
447 // the biased representation. More precisely, let N be 2 to the
448 // power of (kBitCount - 1), an integer x is represented by the
449 // unsigned number x + N.
453 // -N + 1 (the most negative number representable using
454 // sign-and-magnitude) is represented by 1;
455 // 0 is represented by N; and
456 // N - 1 (the biggest number representable using
457 // sign-and-magnitude) is represented by 2N - 1.
459 // Read http://en.wikipedia.org/wiki/Signed_number_representations
460 // for more details on signed number representations.
461 static Bits SignAndMagnitudeToBiased(const Bits &sam) {
462 if (kSignBitMask & sam) {
463 // sam represents a negative number.
466 // sam represents a positive number.
467 return kSignBitMask | sam;
471 // Given two numbers in the sign-and-magnitude representation,
472 // returns the distance between them as an unsigned number.
473 static Bits DistanceBetweenSignAndMagnitudeNumbers(const Bits &sam1,
475 const Bits biased1 = SignAndMagnitudeToBiased(sam1);
476 const Bits biased2 = SignAndMagnitudeToBiased(sam2);
477 return (biased1 >= biased2) ? (biased1 - biased2) : (biased2 - biased1);
480 FloatingPointUnion u_;
483 // Typedefs the instances of the FloatingPoint template class that we
485 typedef FloatingPoint<float> Float;
486 typedef FloatingPoint<double> Double;
488 // In order to catch the mistake of putting tests that use different
489 // test fixture classes in the same test case, we need to assign
490 // unique IDs to fixture classes and compare them. The TypeId type is
491 // used to hold such IDs. The user should treat TypeId as an opaque
492 // type: the only operation allowed on TypeId values is to compare
493 // them for equality using the == operator.
494 typedef const void* TypeId;
496 template <typename T>
499 // dummy_ must not have a const type. Otherwise an overly eager
500 // compiler (e.g. MSVC 7.1 & 8.0) may try to merge
501 // TypeIdHelper<T>::dummy_ for different Ts as an "optimization".
505 template <typename T>
506 bool TypeIdHelper<T>::dummy_ = false;
508 // GetTypeId<T>() returns the ID of type T. Different values will be
509 // returned for different types. Calling the function twice with the
510 // same type argument is guaranteed to return the same ID.
511 template <typename T>
513 // The compiler is required to allocate a different
514 // TypeIdHelper<T>::dummy_ variable for each T used to instantiate
515 // the template. Therefore, the address of dummy_ is guaranteed to
517 return &(TypeIdHelper<T>::dummy_);
520 // Returns the type ID of ::testing::Test. Always call this instead
521 // of GetTypeId< ::testing::Test>() to get the type ID of
522 // ::testing::Test, as the latter may give the wrong result due to a
523 // suspected linker bug when compiling Google Test as a Mac OS X
525 GTEST_API_ TypeId GetTestTypeId();
527 // Defines the abstract factory interface that creates instances
529 class TestFactoryBase {
531 virtual ~TestFactoryBase() {}
533 // Creates a test instance to run. The instance is both created and destroyed
534 // within TestInfoImpl::Run()
535 virtual Test* CreateTest() = 0;
541 GTEST_DISALLOW_COPY_AND_ASSIGN_(TestFactoryBase);
544 // This class provides implementation of TeastFactoryBase interface.
545 // It is used in TEST and TEST_F macros.
546 template <class TestClass>
547 class TestFactoryImpl : public TestFactoryBase {
549 virtual Test* CreateTest() { return new TestClass; }
554 // Predicate-formatters for implementing the HRESULT checking macros
555 // {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}
556 // We pass a long instead of HRESULT to avoid causing an
557 // include dependency for the HRESULT type.
558 GTEST_API_ AssertionResult IsHRESULTSuccess(const char* expr,
560 GTEST_API_ AssertionResult IsHRESULTFailure(const char* expr,
563 #endif // GTEST_OS_WINDOWS
565 // Types of SetUpTestCase() and TearDownTestCase() functions.
566 typedef void (*SetUpTestCaseFunc)();
567 typedef void (*TearDownTestCaseFunc)();
569 // Creates a new TestInfo object and registers it with Google Test;
570 // returns the created object.
574 // test_case_name: name of the test case
575 // name: name of the test
576 // type_param the name of the test's type parameter, or NULL if
577 // this is not a typed or a type-parameterized test.
578 // value_param text representation of the test's value parameter,
579 // or NULL if this is not a type-parameterized test.
580 // fixture_class_id: ID of the test fixture class
581 // set_up_tc: pointer to the function that sets up the test case
582 // tear_down_tc: pointer to the function that tears down the test case
583 // factory: pointer to the factory that creates a test object.
584 // The newly created TestInfo instance will assume
585 // ownership of the factory object.
586 GTEST_API_ TestInfo* MakeAndRegisterTestInfo(
587 const char* test_case_name, const char* name,
588 const char* type_param,
589 const char* value_param,
590 TypeId fixture_class_id,
591 SetUpTestCaseFunc set_up_tc,
592 TearDownTestCaseFunc tear_down_tc,
593 TestFactoryBase* factory);
595 // If *pstr starts with the given prefix, modifies *pstr to be right
596 // past the prefix and returns true; otherwise leaves *pstr unchanged
597 // and returns false. None of pstr, *pstr, and prefix can be NULL.
598 GTEST_API_ bool SkipPrefix(const char* prefix, const char** pstr);
600 #if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
602 // State of the definition of a type-parameterized test case.
603 class GTEST_API_ TypedTestCasePState {
605 TypedTestCasePState() : registered_(false) {}
607 // Adds the given test name to defined_test_names_ and return true
608 // if the test case hasn't been registered; otherwise aborts the
610 bool AddTestName(const char* file, int line, const char* case_name,
611 const char* test_name) {
613 fprintf(stderr, "%s Test %s must be defined before "
614 "REGISTER_TYPED_TEST_CASE_P(%s, ...).\n",
615 FormatFileLocation(file, line).c_str(), test_name, case_name);
619 defined_test_names_.insert(test_name);
623 // Verifies that registered_tests match the test names in
624 // defined_test_names_; returns registered_tests if successful, or
625 // aborts the program otherwise.
626 const char* VerifyRegisteredTestNames(
627 const char* file, int line, const char* registered_tests);
631 ::std::set<const char*> defined_test_names_;
634 // Skips to the first non-space char after the first comma in 'str';
635 // returns NULL if no comma is found in 'str'.
636 inline const char* SkipComma(const char* str) {
637 const char* comma = strchr(str, ',');
641 while (IsSpace(*(++comma))) {}
645 // Returns the prefix of 'str' before the first comma in it; returns
646 // the entire string if it contains no comma.
647 inline String GetPrefixUntilComma(const char* str) {
648 const char* comma = strchr(str, ',');
649 return comma == NULL ? String(str) : String(str, comma - str);
652 // TypeParameterizedTest<Fixture, TestSel, Types>::Register()
653 // registers a list of type-parameterized tests with Google Test. The
654 // return value is insignificant - we just need to return something
655 // such that we can call this function in a namespace scope.
657 // Implementation note: The GTEST_TEMPLATE_ macro declares a template
658 // template parameter. It's defined in gtest-type-util.h.
659 template <GTEST_TEMPLATE_ Fixture, class TestSel, typename Types>
660 class TypeParameterizedTest {
662 // 'index' is the index of the test in the type list 'Types'
663 // specified in INSTANTIATE_TYPED_TEST_CASE_P(Prefix, TestCase,
664 // Types). Valid values for 'index' are [0, N - 1] where N is the
666 static bool Register(const char* prefix, const char* case_name,
667 const char* test_names, int index) {
668 typedef typename Types::Head Type;
669 typedef Fixture<Type> FixtureClass;
670 typedef typename GTEST_BIND_(TestSel, Type) TestClass;
672 // First, registers the first type-parameterized test in the type
674 MakeAndRegisterTestInfo(
675 String::Format("%s%s%s/%d", prefix, prefix[0] == '\0' ? "" : "/",
676 case_name, index).c_str(),
677 GetPrefixUntilComma(test_names).c_str(),
678 GetTypeName<Type>().c_str(),
679 NULL, // No value parameter.
680 GetTypeId<FixtureClass>(),
681 TestClass::SetUpTestCase,
682 TestClass::TearDownTestCase,
683 new TestFactoryImpl<TestClass>);
685 // Next, recurses (at compile time) with the tail of the type list.
686 return TypeParameterizedTest<Fixture, TestSel, typename Types::Tail>
687 ::Register(prefix, case_name, test_names, index + 1);
691 // The base case for the compile time recursion.
692 template <GTEST_TEMPLATE_ Fixture, class TestSel>
693 class TypeParameterizedTest<Fixture, TestSel, Types0> {
695 static bool Register(const char* /*prefix*/, const char* /*case_name*/,
696 const char* /*test_names*/, int /*index*/) {
701 // TypeParameterizedTestCase<Fixture, Tests, Types>::Register()
702 // registers *all combinations* of 'Tests' and 'Types' with Google
703 // Test. The return value is insignificant - we just need to return
704 // something such that we can call this function in a namespace scope.
705 template <GTEST_TEMPLATE_ Fixture, typename Tests, typename Types>
706 class TypeParameterizedTestCase {
708 static bool Register(const char* prefix, const char* case_name,
709 const char* test_names) {
710 typedef typename Tests::Head Head;
712 // First, register the first test in 'Test' for each type in 'Types'.
713 TypeParameterizedTest<Fixture, Head, Types>::Register(
714 prefix, case_name, test_names, 0);
716 // Next, recurses (at compile time) with the tail of the test list.
717 return TypeParameterizedTestCase<Fixture, typename Tests::Tail, Types>
718 ::Register(prefix, case_name, SkipComma(test_names));
722 // The base case for the compile time recursion.
723 template <GTEST_TEMPLATE_ Fixture, typename Types>
724 class TypeParameterizedTestCase<Fixture, Templates0, Types> {
726 static bool Register(const char* /*prefix*/, const char* /*case_name*/,
727 const char* /*test_names*/) {
732 #endif // GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
734 // Returns the current OS stack trace as a String.
736 // The maximum number of stack frames to be included is specified by
737 // the gtest_stack_trace_depth flag. The skip_count parameter
738 // specifies the number of top frames to be skipped, which doesn't
739 // count against the number of frames to be included.
741 // For example, if Foo() calls Bar(), which in turn calls
742 // GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
743 // the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
744 GTEST_API_ String GetCurrentOsStackTraceExceptTop(UnitTest* unit_test,
747 // Helpers for suppressing warnings on unreachable code or constant
750 // Always returns true.
751 GTEST_API_ bool AlwaysTrue();
753 // Always returns false.
754 inline bool AlwaysFalse() { return !AlwaysTrue(); }
756 // Helper for suppressing false warning from Clang on a const char*
757 // variable declared in a conditional expression always being NULL in
759 struct GTEST_API_ ConstCharPtr {
760 ConstCharPtr(const char* str) : value(str) {}
761 operator bool() const { return true; }
765 // A simple Linear Congruential Generator for generating random
766 // numbers with a uniform distribution. Unlike rand() and srand(), it
767 // doesn't use global state (and therefore can't interfere with user
768 // code). Unlike rand_r(), it's portable. An LCG isn't very random,
769 // but it's good enough for our purposes.
770 class GTEST_API_ Random {
772 static const UInt32 kMaxRange = 1u << 31;
774 explicit Random(UInt32 seed) : state_(seed) {}
776 void Reseed(UInt32 seed) { state_ = seed; }
778 // Generates a random number from [0, range). Crashes if 'range' is
779 // 0 or greater than kMaxRange.
780 UInt32 Generate(UInt32 range);
784 GTEST_DISALLOW_COPY_AND_ASSIGN_(Random);
787 // Defining a variable of type CompileAssertTypesEqual<T1, T2> will cause a
788 // compiler error iff T1 and T2 are different types.
789 template <typename T1, typename T2>
790 struct CompileAssertTypesEqual;
792 template <typename T>
793 struct CompileAssertTypesEqual<T, T> {
796 // Removes the reference from a type if it is a reference type,
797 // otherwise leaves it unchanged. This is the same as
798 // tr1::remove_reference, which is not widely available yet.
799 template <typename T>
800 struct RemoveReference { typedef T type; }; // NOLINT
801 template <typename T>
802 struct RemoveReference<T&> { typedef T type; }; // NOLINT
804 // A handy wrapper around RemoveReference that works when the argument
805 // T depends on template parameters.
806 #define GTEST_REMOVE_REFERENCE_(T) \
807 typename ::testing::internal::RemoveReference<T>::type
809 // Removes const from a type if it is a const type, otherwise leaves
810 // it unchanged. This is the same as tr1::remove_const, which is not
811 // widely available yet.
812 template <typename T>
813 struct RemoveConst { typedef T type; }; // NOLINT
814 template <typename T>
815 struct RemoveConst<const T> { typedef T type; }; // NOLINT
817 // MSVC 8.0, Sun C++, and IBM XL C++ have a bug which causes the above
818 // definition to fail to remove the const in 'const int[3]' and 'const
819 // char[3][4]'. The following specialization works around the bug.
820 // However, it causes trouble with GCC and thus needs to be
821 // conditionally compiled.
822 #if defined(_MSC_VER) || defined(__SUNPRO_CC) || defined(__IBMCPP__)
823 template <typename T, size_t N>
824 struct RemoveConst<const T[N]> {
825 typedef typename RemoveConst<T>::type type[N];
829 // A handy wrapper around RemoveConst that works when the argument
830 // T depends on template parameters.
831 #define GTEST_REMOVE_CONST_(T) \
832 typename ::testing::internal::RemoveConst<T>::type
834 // Turns const U&, U&, const U, and U all into U.
835 #define GTEST_REMOVE_REFERENCE_AND_CONST_(T) \
836 GTEST_REMOVE_CONST_(GTEST_REMOVE_REFERENCE_(T))
838 // Adds reference to a type if it is not a reference type,
839 // otherwise leaves it unchanged. This is the same as
840 // tr1::add_reference, which is not widely available yet.
841 template <typename T>
842 struct AddReference { typedef T& type; }; // NOLINT
843 template <typename T>
844 struct AddReference<T&> { typedef T& type; }; // NOLINT
846 // A handy wrapper around AddReference that works when the argument T
847 // depends on template parameters.
848 #define GTEST_ADD_REFERENCE_(T) \
849 typename ::testing::internal::AddReference<T>::type
851 // Adds a reference to const on top of T as necessary. For example,
854 // char ==> const char&
855 // const char ==> const char&
856 // char& ==> const char&
857 // const char& ==> const char&
859 // The argument T must depend on some template parameters.
860 #define GTEST_REFERENCE_TO_CONST_(T) \
861 GTEST_ADD_REFERENCE_(const GTEST_REMOVE_REFERENCE_(T))
863 // ImplicitlyConvertible<From, To>::value is a compile-time bool
864 // constant that's true iff type From can be implicitly converted to
866 template <typename From, typename To>
867 class ImplicitlyConvertible {
869 // We need the following helper functions only for their types.
870 // They have no implementations.
872 // MakeFrom() is an expression whose type is From. We cannot simply
873 // use From(), as the type From may not have a public default
875 static From MakeFrom();
877 // These two functions are overloaded. Given an expression
878 // Helper(x), the compiler will pick the first version if x can be
879 // implicitly converted to type To; otherwise it will pick the
882 // The first version returns a value of size 1, and the second
883 // version returns a value of size 2. Therefore, by checking the
884 // size of Helper(x), which can be done at compile time, we can tell
885 // which version of Helper() is used, and hence whether x can be
886 // implicitly converted to type To.
887 static char Helper(To);
888 static char (&Helper(...))[2]; // NOLINT
890 // We have to put the 'public' section after the 'private' section,
891 // or MSVC refuses to compile the code.
893 // MSVC warns about implicitly converting from double to int for
894 // possible loss of data, so we need to temporarily disable the
897 # pragma warning(push) // Saves the current warning state.
898 # pragma warning(disable:4244) // Temporarily disables warning 4244.
900 static const bool value =
901 sizeof(Helper(ImplicitlyConvertible::MakeFrom())) == 1;
902 # pragma warning(pop) // Restores the warning state.
903 #elif defined(__BORLANDC__)
904 // C++Builder cannot use member overload resolution during template
905 // instantiation. The simplest workaround is to use its C++0x type traits
906 // functions (C++Builder 2009 and above only).
907 static const bool value = __is_convertible(From, To);
909 static const bool value =
910 sizeof(Helper(ImplicitlyConvertible::MakeFrom())) == 1;
913 template <typename From, typename To>
914 const bool ImplicitlyConvertible<From, To>::value;
916 // IsAProtocolMessage<T>::value is a compile-time bool constant that's
917 // true iff T is type ProtocolMessage, proto2::Message, or a subclass
919 template <typename T>
920 struct IsAProtocolMessage
921 : public bool_constant<
922 ImplicitlyConvertible<const T*, const ::ProtocolMessage*>::value ||
923 ImplicitlyConvertible<const T*, const ::proto2::Message*>::value> {
926 // When the compiler sees expression IsContainerTest<C>(0), if C is an
927 // STL-style container class, the first overload of IsContainerTest
928 // will be viable (since both C::iterator* and C::const_iterator* are
929 // valid types and NULL can be implicitly converted to them). It will
930 // be picked over the second overload as 'int' is a perfect match for
931 // the type of argument 0. If C::iterator or C::const_iterator is not
932 // a valid type, the first overload is not viable, and the second
933 // overload will be picked. Therefore, we can determine whether C is
934 // a container class by checking the type of IsContainerTest<C>(0).
935 // The value of the expression is insignificant.
937 // Note that we look for both C::iterator and C::const_iterator. The
938 // reason is that C++ injects the name of a class as a member of the
939 // class itself (e.g. you can refer to class iterator as either
940 // 'iterator' or 'iterator::iterator'). If we look for C::iterator
941 // only, for example, we would mistakenly think that a class named
942 // iterator is an STL container.
944 // Also note that the simpler approach of overloading
945 // IsContainerTest(typename C::const_iterator*) and
946 // IsContainerTest(...) doesn't work with Visual Age C++ and Sun C++.
947 typedef int IsContainer;
949 IsContainer IsContainerTest(int /* dummy */,
950 typename C::iterator* /* it */ = NULL,
951 typename C::const_iterator* /* const_it */ = NULL) {
955 typedef char IsNotContainer;
957 IsNotContainer IsContainerTest(long /* dummy */) { return '\0'; }
959 // EnableIf<condition>::type is void when 'Cond' is true, and
960 // undefined when 'Cond' is false. To use SFINAE to make a function
961 // overload only apply when a particular expression is true, add
962 // "typename EnableIf<expression>::type* = 0" as the last parameter.
963 template<bool> struct EnableIf;
964 template<> struct EnableIf<true> { typedef void type; }; // NOLINT
966 // Utilities for native arrays.
968 // ArrayEq() compares two k-dimensional native arrays using the
969 // elements' operator==, where k can be any integer >= 0. When k is
970 // 0, ArrayEq() degenerates into comparing a single pair of values.
972 template <typename T, typename U>
973 bool ArrayEq(const T* lhs, size_t size, const U* rhs);
975 // This generic version is used when k is 0.
976 template <typename T, typename U>
977 inline bool ArrayEq(const T& lhs, const U& rhs) { return lhs == rhs; }
979 // This overload is used when k >= 1.
980 template <typename T, typename U, size_t N>
981 inline bool ArrayEq(const T(&lhs)[N], const U(&rhs)[N]) {
982 return internal::ArrayEq(lhs, N, rhs);
985 // This helper reduces code bloat. If we instead put its logic inside
986 // the previous ArrayEq() function, arrays with different sizes would
987 // lead to different copies of the template code.
988 template <typename T, typename U>
989 bool ArrayEq(const T* lhs, size_t size, const U* rhs) {
990 for (size_t i = 0; i != size; i++) {
991 if (!internal::ArrayEq(lhs[i], rhs[i]))
997 // Finds the first element in the iterator range [begin, end) that
998 // equals elem. Element may be a native array type itself.
999 template <typename Iter, typename Element>
1000 Iter ArrayAwareFind(Iter begin, Iter end, const Element& elem) {
1001 for (Iter it = begin; it != end; ++it) {
1002 if (internal::ArrayEq(*it, elem))
1008 // CopyArray() copies a k-dimensional native array using the elements'
1009 // operator=, where k can be any integer >= 0. When k is 0,
1010 // CopyArray() degenerates into copying a single value.
1012 template <typename T, typename U>
1013 void CopyArray(const T* from, size_t size, U* to);
1015 // This generic version is used when k is 0.
1016 template <typename T, typename U>
1017 inline void CopyArray(const T& from, U* to) { *to = from; }
1019 // This overload is used when k >= 1.
1020 template <typename T, typename U, size_t N>
1021 inline void CopyArray(const T(&from)[N], U(*to)[N]) {
1022 internal::CopyArray(from, N, *to);
1025 // This helper reduces code bloat. If we instead put its logic inside
1026 // the previous CopyArray() function, arrays with different sizes
1027 // would lead to different copies of the template code.
1028 template <typename T, typename U>
1029 void CopyArray(const T* from, size_t size, U* to) {
1030 for (size_t i = 0; i != size; i++) {
1031 internal::CopyArray(from[i], to + i);
1035 // The relation between an NativeArray object (see below) and the
1036 // native array it represents.
1037 enum RelationToSource {
1038 kReference, // The NativeArray references the native array.
1039 kCopy // The NativeArray makes a copy of the native array and
1043 // Adapts a native array to a read-only STL-style container. Instead
1044 // of the complete STL container concept, this adaptor only implements
1045 // members useful for Google Mock's container matchers. New members
1046 // should be added as needed. To simplify the implementation, we only
1047 // support Element being a raw type (i.e. having no top-level const or
1048 // reference modifier). It's the client's responsibility to satisfy
1049 // this requirement. Element can be an array type itself (hence
1050 // multi-dimensional arrays are supported).
1051 template <typename Element>
1054 // STL-style container typedefs.
1055 typedef Element value_type;
1056 typedef Element* iterator;
1057 typedef const Element* const_iterator;
1059 // Constructs from a native array.
1060 NativeArray(const Element* array, size_t count, RelationToSource relation) {
1061 Init(array, count, relation);
1064 // Copy constructor.
1065 NativeArray(const NativeArray& rhs) {
1066 Init(rhs.array_, rhs.size_, rhs.relation_to_source_);
1070 // Ensures that the user doesn't instantiate NativeArray with a
1071 // const or reference type.
1072 static_cast<void>(StaticAssertTypeEqHelper<Element,
1073 GTEST_REMOVE_REFERENCE_AND_CONST_(Element)>());
1074 if (relation_to_source_ == kCopy)
1078 // STL-style container methods.
1079 size_t size() const { return size_; }
1080 const_iterator begin() const { return array_; }
1081 const_iterator end() const { return array_ + size_; }
1082 bool operator==(const NativeArray& rhs) const {
1083 return size() == rhs.size() &&
1084 ArrayEq(begin(), size(), rhs.begin());
1088 // Initializes this object; makes a copy of the input array if
1089 // 'relation' is kCopy.
1090 void Init(const Element* array, size_t a_size, RelationToSource relation) {
1091 if (relation == kReference) {
1094 Element* const copy = new Element[a_size];
1095 CopyArray(array, a_size, copy);
1099 relation_to_source_ = relation;
1102 const Element* array_;
1104 RelationToSource relation_to_source_;
1106 GTEST_DISALLOW_ASSIGN_(NativeArray);
1109 } // namespace internal
1110 } // namespace testing
1112 #define GTEST_MESSAGE_AT_(file, line, message, result_type) \
1113 ::testing::internal::AssertHelper(result_type, file, line, message) \
1114 = ::testing::Message()
1116 #define GTEST_MESSAGE_(message, result_type) \
1117 GTEST_MESSAGE_AT_(__FILE__, __LINE__, message, result_type)
1119 #define GTEST_FATAL_FAILURE_(message) \
1120 return GTEST_MESSAGE_(message, ::testing::TestPartResult::kFatalFailure)
1122 #define GTEST_NONFATAL_FAILURE_(message) \
1123 GTEST_MESSAGE_(message, ::testing::TestPartResult::kNonFatalFailure)
1125 #define GTEST_SUCCESS_(message) \
1126 GTEST_MESSAGE_(message, ::testing::TestPartResult::kSuccess)
1128 // Suppresses MSVC warnings 4072 (unreachable code) for the code following
1129 // statement if it returns or throws (or doesn't return or throw in some
1131 #define GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement) \
1132 if (::testing::internal::AlwaysTrue()) { statement; }
1134 #define GTEST_TEST_THROW_(statement, expected_exception, fail) \
1135 GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
1136 if (::testing::internal::ConstCharPtr gtest_msg = "") { \
1137 bool gtest_caught_expected = false; \
1139 GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
1141 catch (expected_exception const&) { \
1142 gtest_caught_expected = true; \
1146 "Expected: " #statement " throws an exception of type " \
1147 #expected_exception ".\n Actual: it throws a different type."; \
1148 goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
1150 if (!gtest_caught_expected) { \
1152 "Expected: " #statement " throws an exception of type " \
1153 #expected_exception ".\n Actual: it throws nothing."; \
1154 goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
1157 GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__): \
1158 fail(gtest_msg.value)
1160 #define GTEST_TEST_NO_THROW_(statement, fail) \
1161 GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
1162 if (::testing::internal::AlwaysTrue()) { \
1164 GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
1167 goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
1170 GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__): \
1171 fail("Expected: " #statement " doesn't throw an exception.\n" \
1172 " Actual: it throws.")
1174 #define GTEST_TEST_ANY_THROW_(statement, fail) \
1175 GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
1176 if (::testing::internal::AlwaysTrue()) { \
1177 bool gtest_caught_any = false; \
1179 GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
1182 gtest_caught_any = true; \
1184 if (!gtest_caught_any) { \
1185 goto GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__); \
1188 GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__): \
1189 fail("Expected: " #statement " throws an exception.\n" \
1190 " Actual: it doesn't.")
1193 // Implements Boolean test assertions such as EXPECT_TRUE. expression can be
1194 // either a boolean expression or an AssertionResult. text is a textual
1195 // represenation of expression as it was passed into the EXPECT_TRUE.
1196 #define GTEST_TEST_BOOLEAN_(expression, text, actual, expected, fail) \
1197 GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
1198 if (const ::testing::AssertionResult gtest_ar_ = \
1199 ::testing::AssertionResult(expression)) \
1202 fail(::testing::internal::GetBoolAssertionFailureMessage(\
1203 gtest_ar_, text, #actual, #expected).c_str())
1205 #define GTEST_TEST_NO_FATAL_FAILURE_(statement, fail) \
1206 GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
1207 if (::testing::internal::AlwaysTrue()) { \
1208 ::testing::internal::HasNewFatalFailureHelper gtest_fatal_failure_checker; \
1209 GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
1210 if (gtest_fatal_failure_checker.has_new_fatal_failure()) { \
1211 goto GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__); \
1214 GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__): \
1215 fail("Expected: " #statement " doesn't generate new fatal " \
1216 "failures in the current thread.\n" \
1217 " Actual: it does.")
1219 // Expands to the name of the class that implements the given test.
1220 #define GTEST_TEST_CLASS_NAME_(test_case_name, test_name) \
1221 test_case_name##_##test_name##_Test
1223 // Helper macro for defining tests.
1224 #define GTEST_TEST_(test_case_name, test_name, parent_class, parent_id)\
1225 class GTEST_TEST_CLASS_NAME_(test_case_name, test_name) : public parent_class {\
1227 GTEST_TEST_CLASS_NAME_(test_case_name, test_name)() {}\
1229 virtual void TestBody();\
1230 static ::testing::TestInfo* const test_info_ GTEST_ATTRIBUTE_UNUSED_;\
1231 GTEST_DISALLOW_COPY_AND_ASSIGN_(\
1232 GTEST_TEST_CLASS_NAME_(test_case_name, test_name));\
1235 ::testing::TestInfo* const GTEST_TEST_CLASS_NAME_(test_case_name, test_name)\
1237 ::testing::internal::MakeAndRegisterTestInfo(\
1238 #test_case_name, #test_name, NULL, NULL, \
1240 parent_class::SetUpTestCase, \
1241 parent_class::TearDownTestCase, \
1242 new ::testing::internal::TestFactoryImpl<\
1243 GTEST_TEST_CLASS_NAME_(test_case_name, test_name)>);\
1244 void GTEST_TEST_CLASS_NAME_(test_case_name, test_name)::TestBody()
1246 #endif // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_