// Copyright 2005, 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.
	
	//
	// The Google C++ Testing and Mocking Framework (Google Test)
	//
	// This header file defines the public API for Google Test.  It should be
	// included by any test program that uses Google Test.
	//
	// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
	// leave some internal implementation details in this header file.
	// They are clearly marked by comments like this:
	//
	//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	//
	// Such code is NOT meant to be used by a user directly, and is subject
	// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
	// program!
	//
	// Acknowledgment: Google Test borrowed the idea of automatic test
	// registration from Barthelemy Dagenais' (barthelemy@prologique.com)
	// easyUnit framework.
	
	// GOOGLETEST_CM0001 DO NOT DELETE
	
	#ifndef GTEST_INCLUDE_GTEST_GTEST_H_
	#define GTEST_INCLUDE_GTEST_GTEST_H_
	
	#include <cstddef>
	#include <limits>
	#include <memory>
	#include <ostream>
	#include <type_traits>
	#include <vector>
	
	#include "gtest/internal/gtest-internal.h"
	#include "gtest/internal/gtest-string.h"
	#include "gtest/gtest-death-test.h"
	#include "gtest/gtest-matchers.h"
	#include "gtest/gtest-message.h"
	#include "gtest/gtest-param-test.h"
	#include "gtest/gtest-printers.h"
	#include "gtest/gtest_prod.h"
	#include "gtest/gtest-test-part.h"
	#include "gtest/gtest-typed-test.h"
	
	GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
	/* class A needs to have dll-interface to be used by clients of class B */)
	
	namespace testing {
	
	// Silence C4100 (unreferenced formal parameter) and 4805
	// unsafe mix of type 'const int' and type 'const bool'
	#ifdef _MSC_VER
	# pragma warning(push)
	# pragma warning(disable:4805)
	# pragma warning(disable:4100)
	#endif
	
	
	// Declares the flags.
	
	// This flag temporary enables the disabled tests.
	GTEST_DECLARE_bool_(also_run_disabled_tests);
	
	// This flag brings the debugger on an assertion failure.
	GTEST_DECLARE_bool_(break_on_failure);
	
	// This flag controls whether Google Test catches all test-thrown exceptions
	// and logs them as failures.
	GTEST_DECLARE_bool_(catch_exceptions);
	
	// This flag enables using colors in terminal output. Available values are
	// "yes" to enable colors, "no" (disable colors), or "auto" (the default)
	// to let Google Test decide.
	GTEST_DECLARE_string_(color);
	
	// This flag sets up the filter to select by name using a glob pattern
	// the tests to run. If the filter is not given all tests are executed.
	GTEST_DECLARE_string_(filter);
	
	// This flag controls whether Google Test installs a signal handler that dumps
	// debugging information when fatal signals are raised.
	GTEST_DECLARE_bool_(install_failure_signal_handler);
	
	// This flag causes the Google Test to list tests. None of the tests listed
	// are actually run if the flag is provided.
	GTEST_DECLARE_bool_(list_tests);
	
	// This flag controls whether Google Test emits a detailed XML report to a file
	// in addition to its normal textual output.
	GTEST_DECLARE_string_(output);
	
	// This flags control whether Google Test prints the elapsed time for each
	// test.
	GTEST_DECLARE_bool_(print_time);
	
	// This flags control whether Google Test prints UTF8 characters as text.
	GTEST_DECLARE_bool_(print_utf8);
	
	// This flag specifies the random number seed.
	GTEST_DECLARE_int32_(random_seed);
	
	// This flag sets how many times the tests are repeated. The default value
	// is 1. If the value is -1 the tests are repeating forever.
	GTEST_DECLARE_int32_(repeat);
	
	// This flag controls whether Google Test includes Google Test internal
	// stack frames in failure stack traces.
	GTEST_DECLARE_bool_(show_internal_stack_frames);
	
	// When this flag is specified, tests' order is randomized on every iteration.
	GTEST_DECLARE_bool_(shuffle);
	
	// This flag specifies the maximum number of stack frames to be
	// printed in a failure message.
	GTEST_DECLARE_int32_(stack_trace_depth);
	
	// When this flag is specified, a failed assertion will throw an
	// exception if exceptions are enabled, or exit the program with a
	// non-zero code otherwise. For use with an external test framework.
	GTEST_DECLARE_bool_(throw_on_failure);
	
	// When this flag is set with a "host:port" string, on supported
	// platforms test results are streamed to the specified port on
	// the specified host machine.
	GTEST_DECLARE_string_(stream_result_to);
	
	#if GTEST_USE_OWN_FLAGFILE_FLAG_
	GTEST_DECLARE_string_(flagfile);
	#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
	
	// The upper limit for valid stack trace depths.
	const int kMaxStackTraceDepth = 100;
	
	namespace internal {
	
	class AssertHelper;
	class DefaultGlobalTestPartResultReporter;
	class ExecDeathTest;
	class NoExecDeathTest;
	class FinalSuccessChecker;
	class GTestFlagSaver;
	class StreamingListenerTest;
	class TestResultAccessor;
	class TestEventListenersAccessor;
	class TestEventRepeater;
	class UnitTestRecordPropertyTestHelper;
	class WindowsDeathTest;
	class FuchsiaDeathTest;
	class UnitTestImpl* GetUnitTestImpl();
	void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
	                                    const std::string& message);
	
	}  // namespace internal
	
	// The friend relationship of some of these classes is cyclic.
	// If we don't forward declare them the compiler might confuse the classes
	// in friendship clauses with same named classes on the scope.
	class Test;
	class TestSuite;
	
	// Old API is still available but deprecated
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	using TestCase = TestSuite;
	#endif
	class TestInfo;
	class UnitTest;
	
	// A class for indicating whether an assertion was successful.  When
	// the assertion wasn't successful, the AssertionResult object
	// remembers a non-empty message that describes how it failed.
	//
	// To create an instance of this class, use one of the factory functions
	// (AssertionSuccess() and AssertionFailure()).
	//
	// This class is useful for two purposes:
	//   1. Defining predicate functions to be used with Boolean test assertions
	//      EXPECT_TRUE/EXPECT_FALSE and their ASSERT_ counterparts
	//   2. Defining predicate-format functions to be
	//      used with predicate assertions (ASSERT_PRED_FORMAT*, etc).
	//
	// For example, if you define IsEven predicate:
	//
	//   testing::AssertionResult IsEven(int n) {
	//     if ((n % 2) == 0)
	//       return testing::AssertionSuccess();
	//     else
	//       return testing::AssertionFailure() << n << " is odd";
	//   }
	//
	// Then the failed expectation EXPECT_TRUE(IsEven(Fib(5)))
	// will print the message
	//
	//   Value of: IsEven(Fib(5))
	//     Actual: false (5 is odd)
	//   Expected: true
	//
	// instead of a more opaque
	//
	//   Value of: IsEven(Fib(5))
	//     Actual: false
	//   Expected: true
	//
	// in case IsEven is a simple Boolean predicate.
	//
	// If you expect your predicate to be reused and want to support informative
	// messages in EXPECT_FALSE and ASSERT_FALSE (negative assertions show up
	// about half as often as positive ones in our tests), supply messages for
	// both success and failure cases:
	//
	//   testing::AssertionResult IsEven(int n) {
	//     if ((n % 2) == 0)
	//       return testing::AssertionSuccess() << n << " is even";
	//     else
	//       return testing::AssertionFailure() << n << " is odd";
	//   }
	//
	// Then a statement EXPECT_FALSE(IsEven(Fib(6))) will print
	//
	//   Value of: IsEven(Fib(6))
	//     Actual: true (8 is even)
	//   Expected: false
	//
	// NB: Predicates that support negative Boolean assertions have reduced
	// performance in positive ones so be careful not to use them in tests
	// that have lots (tens of thousands) of positive Boolean assertions.
	//
	// To use this class with EXPECT_PRED_FORMAT assertions such as:
	//
	//   // Verifies that Foo() returns an even number.
	//   EXPECT_PRED_FORMAT1(IsEven, Foo());
	//
	// you need to define:
	//
	//   testing::AssertionResult IsEven(const char* expr, int n) {
	//     if ((n % 2) == 0)
	//       return testing::AssertionSuccess();
	//     else
	//       return testing::AssertionFailure()
	//         << "Expected: " << expr << " is even\n  Actual: it's " << n;
	//   }
	//
	// If Foo() returns 5, you will see the following message:
	//
	//   Expected: Foo() is even
	//     Actual: it's 5
	//
	class GTEST_API_ AssertionResult {
	 public:
	  // Copy constructor.
	  // Used in EXPECT_TRUE/FALSE(assertion_result).
	  AssertionResult(const AssertionResult& other);
	
	#if defined(_MSC_VER) && _MSC_VER < 1910
	  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 /* forcing value to bool */)
	#endif
	
	  // Used in the EXPECT_TRUE/FALSE(bool_expression).
	  //
	  // T must be contextually convertible to bool.
	  //
	  // The second parameter prevents this overload from being considered if
	  // the argument is implicitly convertible to AssertionResult. In that case
	  // we want AssertionResult's copy constructor to be used.
	  template <typename T>
	  explicit AssertionResult(
	      const T& success,
	      typename internal::EnableIf<
	          !std::is_convertible<T, AssertionResult>::value>::type*
	      /*enabler*/
	      = nullptr)
	      : success_(success) {}
	
	#if defined(_MSC_VER) && _MSC_VER < 1910
	  GTEST_DISABLE_MSC_WARNINGS_POP_()
	#endif
	
	  // Assignment operator.
	  AssertionResult& operator=(AssertionResult other) {
	    swap(other);
	    return *this;
	  }
	
	  // Returns true if the assertion succeeded.
	  operator bool() const { return success_; }  // NOLINT
	
	  // Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
	  AssertionResult operator!() const;
	
	  // Returns the text streamed into this AssertionResult. Test assertions
	  // use it when they fail (i.e., the predicate's outcome doesn't match the
	  // assertion's expectation). When nothing has been streamed into the
	  // object, returns an empty string.
	  const char* message() const {
	    return message_.get() != nullptr ? message_->c_str() : "";
	  }
	  // Deprecated; please use message() instead.
	  const char* failure_message() const { return message(); }
	
	  // Streams a custom failure message into this object.
	  template <typename T> AssertionResult& operator<<(const T& value) {
	    AppendMessage(Message() << value);
	    return *this;
	  }
	
	  // Allows streaming basic output manipulators such as endl or flush into
	  // this object.
	  AssertionResult& operator<<(
	      ::std::ostream& (*basic_manipulator)(::std::ostream& stream)) {
	    AppendMessage(Message() << basic_manipulator);
	    return *this;
	  }
	
	 private:
	  // Appends the contents of message to message_.
	  void AppendMessage(const Message& a_message) {
	    if (message_.get() == nullptr) message_.reset(new ::std::string);
	    message_->append(a_message.GetString().c_str());
	  }
	
	  // Swap the contents of this AssertionResult with other.
	  void swap(AssertionResult& other);
	
	  // Stores result of the assertion predicate.
	  bool success_;
	  // Stores the message describing the condition in case the expectation
	  // construct is not satisfied with the predicate's outcome.
	  // Referenced via a pointer to avoid taking too much stack frame space
	  // with test assertions.
	  std::unique_ptr< ::std::string> message_;
	};
	
	// Makes a successful assertion result.
	GTEST_API_ AssertionResult AssertionSuccess();
	
	// Makes a failed assertion result.
	GTEST_API_ AssertionResult AssertionFailure();
	
	// Makes a failed assertion result with the given failure message.
	// Deprecated; use AssertionFailure() << msg.
	GTEST_API_ AssertionResult AssertionFailure(const Message& msg);
	
	}  // namespace testing
	
	// Includes the auto-generated header that implements a family of generic
	// predicate assertion macros. This include comes late because it relies on
	// APIs declared above.
	#include "gtest/gtest_pred_impl.h"
	
	namespace testing {
	
	// The abstract class that all tests inherit from.
	//
	// In Google Test, a unit test program contains one or many TestSuites, and
	// each TestSuite contains one or many Tests.
	//
	// When you define a test using the TEST macro, you don't need to
	// explicitly derive from Test - the TEST macro automatically does
	// this for you.
	//
	// The only time you derive from Test is when defining a test fixture
	// to be used in a TEST_F.  For example:
	//
	//   class FooTest : public testing::Test {
	//    protected:
	//     void SetUp() override { ... }
	//     void TearDown() override { ... }
	//     ...
	//   };
	//
	//   TEST_F(FooTest, Bar) { ... }
	//   TEST_F(FooTest, Baz) { ... }
	//
	// Test is not copyable.
	class GTEST_API_ Test {
	 public:
	  friend class TestInfo;
	
	  // The d'tor is virtual as we intend to inherit from Test.
	  virtual ~Test();
	
	  // Sets up the stuff shared by all tests in this test case.
	  //
	  // Google Test will call Foo::SetUpTestSuite() before running the first
	  // test in test case Foo.  Hence a sub-class can define its own
	  // SetUpTestSuite() method to shadow the one defined in the super
	  // class.
	  // Failures that happen during SetUpTestSuite are logged but otherwise
	  // ignored.
	  static void SetUpTestSuite() {}
	
	  // Tears down the stuff shared by all tests in this test suite.
	  //
	  // Google Test will call Foo::TearDownTestSuite() after running the last
	  // test in test case Foo.  Hence a sub-class can define its own
	  // TearDownTestSuite() method to shadow the one defined in the super
	  // class.
	  // Failures that happen during TearDownTestSuite are logged but otherwise
	  // ignored.
	  static void TearDownTestSuite() {}
	
	  // Legacy API is deprecated but still available
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	  static void TearDownTestCase() {}
	  static void SetUpTestCase() {}
	#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	
	  // Returns true if the current test has a fatal failure.
	  static bool HasFatalFailure();
	
	  // Returns true if the current test has a non-fatal failure.
	  static bool HasNonfatalFailure();
	
	  // Returns true if the current test was skipped.
	  static bool IsSkipped();
	
	  // Returns true if the current test has a (either fatal or
	  // non-fatal) failure.
	  static bool HasFailure() { return HasFatalFailure() || HasNonfatalFailure(); }
	
	  // Logs a property for the current test, test suite, or for the entire
	  // invocation of the test program when used outside of the context of a
	  // test suite.  Only the last value for a given key is remembered.  These
	  // are public static so they can be called from utility functions that are
	  // not members of the test fixture.  Calls to RecordProperty made during
	  // lifespan of the test (from the moment its constructor starts to the
	  // moment its destructor finishes) will be output in XML as attributes of
	  // the <testcase> element.  Properties recorded from fixture's
	  // SetUpTestSuite or TearDownTestSuite are logged as attributes of the
	  // corresponding <testsuite> element.  Calls to RecordProperty made in the
	  // global context (before or after invocation of RUN_ALL_TESTS and from
	  // SetUp/TearDown method of Environment objects registered with Google
	  // Test) will be output as attributes of the <testsuites> element.
	  static void RecordProperty(const std::string& key, const std::string& value);
	  static void RecordProperty(const std::string& key, int value);
	
	 protected:
	  // Creates a Test object.
	  Test();
	
	  // Sets up the test fixture.
	  virtual void SetUp();
	
	  // Tears down the test fixture.
	  virtual void TearDown();
	
	 private:
	  // Returns true if the current test has the same fixture class as
	  // the first test in the current test suite.
	  static bool HasSameFixtureClass();
	
	  // Runs the test after the test fixture has been set up.
	  //
	  // A sub-class must implement this to define the test logic.
	  //
	  // DO NOT OVERRIDE THIS FUNCTION DIRECTLY IN A USER PROGRAM.
	  // Instead, use the TEST or TEST_F macro.
	  virtual void TestBody() = 0;
	
	  // Sets up, executes, and tears down the test.
	  void Run();
	
	  // Deletes self.  We deliberately pick an unusual name for this
	  // internal method to avoid clashing with names used in user TESTs.
	  void DeleteSelf_() { delete this; }
	
	  const std::unique_ptr<GTEST_FLAG_SAVER_> gtest_flag_saver_;
	
	  // Often a user misspells SetUp() as Setup() and spends a long time
	  // wondering why it is never called by Google Test.  The declaration of
	  // the following method is solely for catching such an error at
	  // compile time:
	  //
	  //   - The return type is deliberately chosen to be not void, so it
	  //   will be a conflict if void Setup() is declared in the user's
	  //   test fixture.
	  //
	  //   - This method is private, so it will be another compiler error
	  //   if the method is called from the user's test fixture.
	  //
	  // DO NOT OVERRIDE THIS FUNCTION.
	  //
	  // If you see an error about overriding the following function or
	  // about it being private, you have mis-spelled SetUp() as Setup().
	  struct Setup_should_be_spelled_SetUp {};
	  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
	
	  // We disallow copying Tests.
	  GTEST_DISALLOW_COPY_AND_ASSIGN_(Test);
	};
	
	typedef internal::TimeInMillis TimeInMillis;
	
	// A copyable object representing a user specified test property which can be
	// output as a key/value string pair.
	//
	// Don't inherit from TestProperty as its destructor is not virtual.
	class TestProperty {
	 public:
	  // C'tor.  TestProperty does NOT have a default constructor.
	  // Always use this constructor (with parameters) to create a
	  // TestProperty object.
	  TestProperty(const std::string& a_key, const std::string& a_value) :
	    key_(a_key), value_(a_value) {
	  }
	
	  // Gets the user supplied key.
	  const char* key() const {
	    return key_.c_str();
	  }
	
	  // Gets the user supplied value.
	  const char* value() const {
	    return value_.c_str();
	  }
	
	  // Sets a new value, overriding the one supplied in the constructor.
	  void SetValue(const std::string& new_value) {
	    value_ = new_value;
	  }
	
	 private:
	  // The key supplied by the user.
	  std::string key_;
	  // The value supplied by the user.
	  std::string value_;
	};
	
	// The result of a single Test.  This includes a list of
	// TestPartResults, a list of TestProperties, a count of how many
	// death tests there are in the Test, and how much time it took to run
	// the Test.
	//
	// TestResult is not copyable.
	class GTEST_API_ TestResult {
	 public:
	  // Creates an empty TestResult.
	  TestResult();
	
	  // D'tor.  Do not inherit from TestResult.
	  ~TestResult();
	
	  // Gets the number of all test parts.  This is the sum of the number
	  // of successful test parts and the number of failed test parts.
	  int total_part_count() const;
	
	  // Returns the number of the test properties.
	  int test_property_count() const;
	
	  // Returns true if the test passed (i.e. no test part failed).
	  bool Passed() const { return !Skipped() && !Failed(); }
	
	  // Returns true if the test was skipped.
	  bool Skipped() const;
	
	  // Returns true if the test failed.
	  bool Failed() const;
	
	  // Returns true if the test fatally failed.
	  bool HasFatalFailure() const;
	
	  // Returns true if the test has a non-fatal failure.
	  bool HasNonfatalFailure() const;
	
	  // Returns the elapsed time, in milliseconds.
	  TimeInMillis elapsed_time() const { return elapsed_time_; }
	
	  // Gets the time of the test case start, in ms from the start of the
	  // UNIX epoch.
	  TimeInMillis start_timestamp() const { return start_timestamp_; }
	
	  // Returns the i-th test part result among all the results. i can range from 0
	  // to total_part_count() - 1. If i is not in that range, aborts the program.
	  const TestPartResult& GetTestPartResult(int i) const;
	
	  // Returns the i-th test property. i can range from 0 to
	  // test_property_count() - 1. If i is not in that range, aborts the
	  // program.
	  const TestProperty& GetTestProperty(int i) const;
	
	 private:
	  friend class TestInfo;
	  friend class TestSuite;
	  friend class UnitTest;
	  friend class internal::DefaultGlobalTestPartResultReporter;
	  friend class internal::ExecDeathTest;
	  friend class internal::TestResultAccessor;
	  friend class internal::UnitTestImpl;
	  friend class internal::WindowsDeathTest;
	  friend class internal::FuchsiaDeathTest;
	
	  // Gets the vector of TestPartResults.
	  const std::vector<TestPartResult>& test_part_results() const {
	    return test_part_results_;
	  }
	
	  // Gets the vector of TestProperties.
	  const std::vector<TestProperty>& test_properties() const {
	    return test_properties_;
	  }
	
	  // Sets the start time.
	  void set_start_timestamp(TimeInMillis start) { start_timestamp_ = start; }
	
	  // Sets the elapsed time.
	  void set_elapsed_time(TimeInMillis elapsed) { elapsed_time_ = elapsed; }
	
	  // Adds a test property to the list. The property is validated and may add
	  // a non-fatal failure if invalid (e.g., if it conflicts with reserved
	  // key names). If a property is already recorded for the same key, the
	  // value will be updated, rather than storing multiple values for the same
	  // key.  xml_element specifies the element for which the property is being
	  // recorded and is used for validation.
	  void RecordProperty(const std::string& xml_element,
	                      const TestProperty& test_property);
	
	  // Adds a failure if the key is a reserved attribute of Google Test
	  // testsuite tags.  Returns true if the property is valid.
	  // FIXME: Validate attribute names are legal and human readable.
	  static bool ValidateTestProperty(const std::string& xml_element,
	                                   const TestProperty& test_property);
	
	  // Adds a test part result to the list.
	  void AddTestPartResult(const TestPartResult& test_part_result);
	
	  // Returns the death test count.
	  int death_test_count() const { return death_test_count_; }
	
	  // Increments the death test count, returning the new count.
	  int increment_death_test_count() { return ++death_test_count_; }
	
	  // Clears the test part results.
	  void ClearTestPartResults();
	
	  // Clears the object.
	  void Clear();
	
	  // Protects mutable state of the property vector and of owned
	  // properties, whose values may be updated.
	  internal::Mutex test_properites_mutex_;
	
	  // The vector of TestPartResults
	  std::vector<TestPartResult> test_part_results_;
	  // The vector of TestProperties
	  std::vector<TestProperty> test_properties_;
	  // Running count of death tests.
	  int death_test_count_;
	  // The start time, in milliseconds since UNIX Epoch.
	  TimeInMillis start_timestamp_;
	  // The elapsed time, in milliseconds.
	  TimeInMillis elapsed_time_;
	
	  // We disallow copying TestResult.
	  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestResult);
	};  // class TestResult
	
	// A TestInfo object stores the following information about a test:
	//
	//   Test suite name
	//   Test name
	//   Whether the test should be run
	//   A function pointer that creates the test object when invoked
	//   Test result
	//
	// The constructor of TestInfo registers itself with the UnitTest
	// singleton such that the RUN_ALL_TESTS() macro knows which tests to
	// run.
	class GTEST_API_ TestInfo {
	 public:
	  // Destructs a TestInfo object.  This function is not virtual, so
	  // don't inherit from TestInfo.
	  ~TestInfo();
	
	  // Returns the test suite name.
	  const char* test_suite_name() const { return test_suite_name_.c_str(); }
	
	// Legacy API is deprecated but still available
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	  const char* test_case_name() const { return test_suite_name(); }
	#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	
	  // Returns the test name.
	  const char* name() const { return name_.c_str(); }
	
	  // Returns the name of the parameter type, or NULL if this is not a typed
	  // or a type-parameterized test.
	  const char* type_param() const {
	    if (type_param_.get() != nullptr) return type_param_->c_str();
	    return nullptr;
	  }
	
	  // Returns the text representation of the value parameter, or NULL if this
	  // is not a value-parameterized test.
	  const char* value_param() const {
	    if (value_param_.get() != nullptr) return value_param_->c_str();
	    return nullptr;
	  }
	
	  // Returns the file name where this test is defined.
	  const char* file() const { return location_.file.c_str(); }
	
	  // Returns the line where this test is defined.
	  int line() const { return location_.line; }
	
	  // Return true if this test should not be run because it's in another shard.
	  bool is_in_another_shard() const { return is_in_another_shard_; }
	
	  // Returns true if this test should run, that is if the test is not
	  // disabled (or it is disabled but the also_run_disabled_tests flag has
	  // been specified) and its full name matches the user-specified filter.
	  //
	  // Google Test allows the user to filter the tests by their full names.
	  // The full name of a test Bar in test suite Foo is defined as
	  // "Foo.Bar".  Only the tests that match the filter will run.
	  //
	  // A filter is a colon-separated list of glob (not regex) patterns,
	  // optionally followed by a '-' and a colon-separated list of
	  // negative patterns (tests to exclude).  A test is run if it
	  // matches one of the positive patterns and does not match any of
	  // the negative patterns.
	  //
	  // For example, *A*:Foo.* is a filter that matches any string that
	  // contains the character 'A' or starts with "Foo.".
	  bool should_run() const { return should_run_; }
	
	  // Returns true if this test will appear in the XML report.
	  bool is_reportable() const {
	    // The XML report includes tests matching the filter, excluding those
	    // run in other shards.
	    return matches_filter_ && !is_in_another_shard_;
	  }
	
	  // Returns the result of the test.
	  const TestResult* result() const { return &result_; }
	
	 private:
	#if GTEST_HAS_DEATH_TEST
	  friend class internal::DefaultDeathTestFactory;
	#endif  // GTEST_HAS_DEATH_TEST
	  friend class Test;
	  friend class TestSuite;
	  friend class internal::UnitTestImpl;
	  friend class internal::StreamingListenerTest;
	  friend TestInfo* internal::MakeAndRegisterTestInfo(
	      const char* test_suite_name, const char* name, const char* type_param,
	      const char* value_param, internal::CodeLocation code_location,
	      internal::TypeId fixture_class_id, internal::SetUpTestSuiteFunc set_up_tc,
	      internal::TearDownTestSuiteFunc tear_down_tc,
	      internal::TestFactoryBase* factory);
	
	  // Constructs a TestInfo object. The newly constructed instance assumes
	  // ownership of the factory object.
	  TestInfo(const std::string& test_suite_name, const std::string& name,
	           const char* a_type_param,   // NULL if not a type-parameterized test
	           const char* a_value_param,  // NULL if not a value-parameterized test
	           internal::CodeLocation a_code_location,
	           internal::TypeId fixture_class_id,
	           internal::TestFactoryBase* factory);
	
	  // Increments the number of death tests encountered in this test so
	  // far.
	  int increment_death_test_count() {
	    return result_.increment_death_test_count();
	  }
	
	  // Creates the test object, runs it, records its result, and then
	  // deletes it.
	  void Run();
	
	  static void ClearTestResult(TestInfo* test_info) {
	    test_info->result_.Clear();
	  }
	
	  // These fields are immutable properties of the test.
	  const std::string test_suite_name_;    // test suite name
	  const std::string name_;               // Test name
	  // Name of the parameter type, or NULL if this is not a typed or a
	  // type-parameterized test.
	  const std::unique_ptr<const ::std::string> type_param_;
	  // Text representation of the value parameter, or NULL if this is not a
	  // value-parameterized test.
	  const std::unique_ptr<const ::std::string> value_param_;
	  internal::CodeLocation location_;
	  const internal::TypeId fixture_class_id_;   // ID of the test fixture class
	  bool should_run_;                 // True if this test should run
	  bool is_disabled_;                // True if this test is disabled
	  bool matches_filter_;             // True if this test matches the
	                                    // user-specified filter.
	  bool is_in_another_shard_;        // Will be run in another shard.
	  internal::TestFactoryBase* const factory_;  // The factory that creates
	                                              // the test object
	
	  // This field is mutable and needs to be reset before running the
	  // test for the second time.
	  TestResult result_;
	
	  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestInfo);
	};
	
	// A test suite, which consists of a vector of TestInfos.
	//
	// TestSuite is not copyable.
	class GTEST_API_ TestSuite {
	 public:
	  // Creates a TestSuite with the given name.
	  //
	  // TestSuite does NOT have a default constructor.  Always use this
	  // constructor to create a TestSuite object.
	  //
	  // Arguments:
	  //
	  //   name:         name of the test suite
	  //   a_type_param: the name of the test's type parameter, or NULL if
	  //                 this is not a type-parameterized test.
	  //   set_up_tc:    pointer to the function that sets up the test suite
	  //   tear_down_tc: pointer to the function that tears down the test suite
	  TestSuite(const char* name, const char* a_type_param,
	            internal::SetUpTestSuiteFunc set_up_tc,
	            internal::TearDownTestSuiteFunc tear_down_tc);
	
	  // Destructor of TestSuite.
	  virtual ~TestSuite();
	
	  // Gets the name of the TestSuite.
	  const char* name() const { return name_.c_str(); }
	
	  // Returns the name of the parameter type, or NULL if this is not a
	  // type-parameterized test suite.
	  const char* type_param() const {
	    if (type_param_.get() != nullptr) return type_param_->c_str();
	    return nullptr;
	  }
	
	  // Returns true if any test in this test suite should run.
	  bool should_run() const { return should_run_; }
	
	  // Gets the number of successful tests in this test suite.
	  int successful_test_count() const;
	
	  // Gets the number of skipped tests in this test suite.
	  int skipped_test_count() const;
	
	  // Gets the number of failed tests in this test suite.
	  int failed_test_count() const;
	
	  // Gets the number of disabled tests that will be reported in the XML report.
	  int reportable_disabled_test_count() const;
	
	  // Gets the number of disabled tests in this test suite.
	  int disabled_test_count() const;
	
	  // Gets the number of tests to be printed in the XML report.
	  int reportable_test_count() const;
	
	  // Get the number of tests in this test suite that should run.
	  int test_to_run_count() const;
	
	  // Gets the number of all tests in this test suite.
	  int total_test_count() const;
	
	  // Returns true if the test suite passed.
	  bool Passed() const { return !Failed(); }
	
	  // Returns true if the test suite failed.
	  bool Failed() const { return failed_test_count() > 0; }
	
	  // Returns the elapsed time, in milliseconds.
	  TimeInMillis elapsed_time() const { return elapsed_time_; }
	
	  // Gets the time of the test suite start, in ms from the start of the
	  // UNIX epoch.
	  TimeInMillis start_timestamp() const { return start_timestamp_; }
	
	  // Returns the i-th test among all the tests. i can range from 0 to
	  // total_test_count() - 1. If i is not in that range, returns NULL.
	  const TestInfo* GetTestInfo(int i) const;
	
	  // Returns the TestResult that holds test properties recorded during
	  // execution of SetUpTestSuite and TearDownTestSuite.
	  const TestResult& ad_hoc_test_result() const { return ad_hoc_test_result_; }
	
	 private:
	  friend class Test;
	  friend class internal::UnitTestImpl;
	
	  // Gets the (mutable) vector of TestInfos in this TestSuite.
	  std::vector<TestInfo*>& test_info_list() { return test_info_list_; }
	
	  // Gets the (immutable) vector of TestInfos in this TestSuite.
	  const std::vector<TestInfo*>& test_info_list() const {
	    return test_info_list_;
	  }
	
	  // Returns the i-th test among all the tests. i can range from 0 to
	  // total_test_count() - 1. If i is not in that range, returns NULL.
	  TestInfo* GetMutableTestInfo(int i);
	
	  // Sets the should_run member.
	  void set_should_run(bool should) { should_run_ = should; }
	
	  // Adds a TestInfo to this test suite.  Will delete the TestInfo upon
	  // destruction of the TestSuite object.
	  void AddTestInfo(TestInfo * test_info);
	
	  // Clears the results of all tests in this test suite.
	  void ClearResult();
	
	  // Clears the results of all tests in the given test suite.
	  static void ClearTestSuiteResult(TestSuite* test_suite) {
	    test_suite->ClearResult();
	  }
	
	  // Runs every test in this TestSuite.
	  void Run();
	
	  // Runs SetUpTestSuite() for this TestSuite.  This wrapper is needed
	  // for catching exceptions thrown from SetUpTestSuite().
	  void RunSetUpTestSuite() {
	    if (set_up_tc_ != nullptr) {
	      (*set_up_tc_)();
	    }
	  }
	
	  // Runs TearDownTestSuite() for this TestSuite.  This wrapper is
	  // needed for catching exceptions thrown from TearDownTestSuite().
	  void RunTearDownTestSuite() {
	    if (tear_down_tc_ != nullptr) {
	      (*tear_down_tc_)();
	    }
	  }
	
	  // Returns true if test passed.
	  static bool TestPassed(const TestInfo* test_info) {
	    return test_info->should_run() && test_info->result()->Passed();
	  }
	
	  // Returns true if test skipped.
	  static bool TestSkipped(const TestInfo* test_info) {
	    return test_info->should_run() && test_info->result()->Skipped();
	  }
	
	  // Returns true if test failed.
	  static bool TestFailed(const TestInfo* test_info) {
	    return test_info->should_run() && test_info->result()->Failed();
	  }
	
	  // Returns true if the test is disabled and will be reported in the XML
	  // report.
	  static bool TestReportableDisabled(const TestInfo* test_info) {
	    return test_info->is_reportable() && test_info->is_disabled_;
	  }
	
	  // Returns true if test is disabled.
	  static bool TestDisabled(const TestInfo* test_info) {
	    return test_info->is_disabled_;
	  }
	
	  // Returns true if this test will appear in the XML report.
	  static bool TestReportable(const TestInfo* test_info) {
	    return test_info->is_reportable();
	  }
	
	  // Returns true if the given test should run.
	  static bool ShouldRunTest(const TestInfo* test_info) {
	    return test_info->should_run();
	  }
	
	  // Shuffles the tests in this test suite.
	  void ShuffleTests(internal::Random* random);
	
	  // Restores the test order to before the first shuffle.
	  void UnshuffleTests();
	
	  // Name of the test suite.
	  std::string name_;
	  // Name of the parameter type, or NULL if this is not a typed or a
	  // type-parameterized test.
	  const std::unique_ptr<const ::std::string> type_param_;
	  // The vector of TestInfos in their original order.  It owns the
	  // elements in the vector.
	  std::vector<TestInfo*> test_info_list_;
	  // Provides a level of indirection for the test list to allow easy
	  // shuffling and restoring the test order.  The i-th element in this
	  // vector is the index of the i-th test in the shuffled test list.
	  std::vector<int> test_indices_;
	  // Pointer to the function that sets up the test suite.
	  internal::SetUpTestSuiteFunc set_up_tc_;
	  // Pointer to the function that tears down the test suite.
	  internal::TearDownTestSuiteFunc tear_down_tc_;
	  // True if any test in this test suite should run.
	  bool should_run_;
	  // The start time, in milliseconds since UNIX Epoch.
	  TimeInMillis start_timestamp_;
	  // Elapsed time, in milliseconds.
	  TimeInMillis elapsed_time_;
	  // Holds test properties recorded during execution of SetUpTestSuite and
	  // TearDownTestSuite.
	  TestResult ad_hoc_test_result_;
	
	  // We disallow copying TestSuites.
	  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestSuite);
	};
	
	// An Environment object is capable of setting up and tearing down an
	// environment.  You should subclass this to define your own
	// environment(s).
	//
	// An Environment object does the set-up and tear-down in virtual
	// methods SetUp() and TearDown() instead of the constructor and the
	// destructor, as:
	//
	//   1. You cannot safely throw from a destructor.  This is a problem
	//      as in some cases Google Test is used where exceptions are enabled, and
	//      we may want to implement ASSERT_* using exceptions where they are
	//      available.
	//   2. You cannot use ASSERT_* directly in a constructor or
	//      destructor.
	class Environment {
	 public:
	  // The d'tor is virtual as we need to subclass Environment.
	  virtual ~Environment() {}
	
	  // Override this to define how to set up the environment.
	  virtual void SetUp() {}
	
	  // Override this to define how to tear down the environment.
	  virtual void TearDown() {}
	 private:
	  // If you see an error about overriding the following function or
	  // about it being private, you have mis-spelled SetUp() as Setup().
	  struct Setup_should_be_spelled_SetUp {};
	  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
	};
	
	#if GTEST_HAS_EXCEPTIONS
	
	// Exception which can be thrown from TestEventListener::OnTestPartResult.
	class GTEST_API_ AssertionException
	    : public internal::GoogleTestFailureException {
	 public:
	  explicit AssertionException(const TestPartResult& result)
	      : GoogleTestFailureException(result) {}
	};
	
	#endif  // GTEST_HAS_EXCEPTIONS
	
	// The interface for tracing execution of tests. The methods are organized in
	// the order the corresponding events are fired.
	class TestEventListener {
	 public:
	  virtual ~TestEventListener() {}
	
	  // Fired before any test activity starts.
	  virtual void OnTestProgramStart(const UnitTest& unit_test) = 0;
	
	  // Fired before each iteration of tests starts.  There may be more than
	  // one iteration if GTEST_FLAG(repeat) is set. iteration is the iteration
	  // index, starting from 0.
	  virtual void OnTestIterationStart(const UnitTest& unit_test,
	                                    int iteration) = 0;
	
	  // Fired before environment set-up for each iteration of tests starts.
	  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test) = 0;
	
	  // Fired after environment set-up for each iteration of tests ends.
	  virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) = 0;
	
	  // Fired before the test suite starts.
	  virtual void OnTestSuiteStart(const TestSuite& /*test_suite*/) {}
	
	  //  Legacy API is deprecated but still available
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	  virtual void OnTestCaseStart(const TestCase& /*test_case*/) {}
	#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	
	  // Fired before the test starts.
	  virtual void OnTestStart(const TestInfo& test_info) = 0;
	
	  // Fired after a failed assertion or a SUCCEED() invocation.
	  // If you want to throw an exception from this function to skip to the next
	  // TEST, it must be AssertionException defined above, or inherited from it.
	  virtual void OnTestPartResult(const TestPartResult& test_part_result) = 0;
	
	  // Fired after the test ends.
	  virtual void OnTestEnd(const TestInfo& test_info) = 0;
	
	  // Fired after the test suite ends.
	  virtual void OnTestSuiteEnd(const TestSuite& /*test_suite*/) {}
	
	//  Legacy API is deprecated but still available
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	  virtual void OnTestCaseEnd(const TestCase& /*test_case*/) {}
	#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	
	  // Fired before environment tear-down for each iteration of tests starts.
	  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test) = 0;
	
	  // Fired after environment tear-down for each iteration of tests ends.
	  virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) = 0;
	
	  // Fired after each iteration of tests finishes.
	  virtual void OnTestIterationEnd(const UnitTest& unit_test,
	                                  int iteration) = 0;
	
	  // Fired after all test activities have ended.
	  virtual void OnTestProgramEnd(const UnitTest& unit_test) = 0;
	};
	
	// The convenience class for users who need to override just one or two
	// methods and are not concerned that a possible change to a signature of
	// the methods they override will not be caught during the build.  For
	// comments about each method please see the definition of TestEventListener
	// above.
	class EmptyTestEventListener : public TestEventListener {
	 public:
	  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
	  void OnTestIterationStart(const UnitTest& /*unit_test*/,
	                            int /*iteration*/) override {}
	  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {}
	  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
	  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {}
	//  Legacy API is deprecated but still available
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	  void OnTestCaseStart(const TestCase& /*test_case*/) override {}
	#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	
	  void OnTestStart(const TestInfo& /*test_info*/) override {}
	  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {}
	  void OnTestEnd(const TestInfo& /*test_info*/) override {}
	  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {}
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	  void OnTestCaseEnd(const TestCase& /*test_case*/) override {}
	#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	
	  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {}
	  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
	  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
	                          int /*iteration*/) override {}
	  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
	};
	
	// TestEventListeners lets users add listeners to track events in Google Test.
	class GTEST_API_ TestEventListeners {
	 public:
	  TestEventListeners();
	  ~TestEventListeners();
	
	  // Appends an event listener to the end of the list. Google Test assumes
	  // the ownership of the listener (i.e. it will delete the listener when
	  // the test program finishes).
	  void Append(TestEventListener* listener);
	
	  // Removes the given event listener from the list and returns it.  It then
	  // becomes the caller's responsibility to delete the listener. Returns
	  // NULL if the listener is not found in the list.
	  TestEventListener* Release(TestEventListener* listener);
	
	  // Returns the standard listener responsible for the default console
	  // output.  Can be removed from the listeners list to shut down default
	  // console output.  Note that removing this object from the listener list
	  // with Release transfers its ownership to the caller and makes this
	  // function return NULL the next time.
	  TestEventListener* default_result_printer() const {
	    return default_result_printer_;
	  }
	
	  // Returns the standard listener responsible for the default XML output
	  // controlled by the --gtest_output=xml flag.  Can be removed from the
	  // listeners list by users who want to shut down the default XML output
	  // controlled by this flag and substitute it with custom one.  Note that
	  // removing this object from the listener list with Release transfers its
	  // ownership to the caller and makes this function return NULL the next
	  // time.
	  TestEventListener* default_xml_generator() const {
	    return default_xml_generator_;
	  }
	
	 private:
	  friend class TestSuite;
	  friend class TestInfo;
	  friend class internal::DefaultGlobalTestPartResultReporter;
	  friend class internal::NoExecDeathTest;
	  friend class internal::TestEventListenersAccessor;
	  friend class internal::UnitTestImpl;
	
	  // Returns repeater that broadcasts the TestEventListener events to all
	  // subscribers.
	  TestEventListener* repeater();
	
	  // Sets the default_result_printer attribute to the provided listener.
	  // The listener is also added to the listener list and previous
	  // default_result_printer is removed from it and deleted. The listener can
	  // also be NULL in which case it will not be added to the list. Does
	  // nothing if the previous and the current listener objects are the same.
	  void SetDefaultResultPrinter(TestEventListener* listener);
	
	  // Sets the default_xml_generator attribute to the provided listener.  The
	  // listener is also added to the listener list and previous
	  // default_xml_generator is removed from it and deleted. The listener can
	  // also be NULL in which case it will not be added to the list. Does
	  // nothing if the previous and the current listener objects are the same.
	  void SetDefaultXmlGenerator(TestEventListener* listener);
	
	  // Controls whether events will be forwarded by the repeater to the
	  // listeners in the list.
	  bool EventForwardingEnabled() const;
	  void SuppressEventForwarding();
	
	  // The actual list of listeners.
	  internal::TestEventRepeater* repeater_;
	  // Listener responsible for the standard result output.
	  TestEventListener* default_result_printer_;
	  // Listener responsible for the creation of the XML output file.
	  TestEventListener* default_xml_generator_;
	
	  // We disallow copying TestEventListeners.
	  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventListeners);
	};
	
	// A UnitTest consists of a vector of TestSuites.
	//
	// This is a singleton class.  The only instance of UnitTest is
	// created when UnitTest::GetInstance() is first called.  This
	// instance is never deleted.
	//
	// UnitTest is not copyable.
	//
	// This class is thread-safe as long as the methods are called
	// according to their specification.
	class GTEST_API_ UnitTest {
	 public:
	  // Gets the singleton UnitTest object.  The first time this method
	  // is called, a UnitTest object is constructed and returned.
	  // Consecutive calls will return the same object.
	  static UnitTest* GetInstance();
	
	  // Runs all tests in this UnitTest object and prints the result.
	  // Returns 0 if successful, or 1 otherwise.
	  //
	  // This method can only be called from the main thread.
	  //
	  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	  int Run() GTEST_MUST_USE_RESULT_;
	
	  // Returns the working directory when the first TEST() or TEST_F()
	  // was executed.  The UnitTest object owns the string.
	  const char* original_working_dir() const;
	
	  // Returns the TestSuite object for the test that's currently running,
	  // or NULL if no test is running.
	  const TestSuite* current_test_suite() const GTEST_LOCK_EXCLUDED_(mutex_);
	
	// Legacy API is still available but deprecated
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	  const TestCase* current_test_case() const GTEST_LOCK_EXCLUDED_(mutex_);
	#endif
	
	  // Returns the TestInfo object for the test that's currently running,
	  // or NULL if no test is running.
	  const TestInfo* current_test_info() const
	      GTEST_LOCK_EXCLUDED_(mutex_);
	
	  // Returns the random seed used at the start of the current test run.
	  int random_seed() const;
	
	  // Returns the ParameterizedTestSuiteRegistry object used to keep track of
	  // value-parameterized tests and instantiate and register them.
	  //
	  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry()
	      GTEST_LOCK_EXCLUDED_(mutex_);
	
	  // Gets the number of successful test suites.
	  int successful_test_suite_count() const;
	
	  // Gets the number of failed test suites.
	  int failed_test_suite_count() const;
	
	  // Gets the number of all test suites.
	  int total_test_suite_count() const;
	
	  // Gets the number of all test suites that contain at least one test
	  // that should run.
	  int test_suite_to_run_count() const;
	
	  //  Legacy API is deprecated but still available
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	  int successful_test_case_count() const;
	  int failed_test_case_count() const;
	  int total_test_case_count() const;
	  int test_case_to_run_count() const;
	#endif  //  EMOVE_LEGACY_TEST_CASEAPI
	
	  // Gets the number of successful tests.
	  int successful_test_count() const;
	
	  // Gets the number of skipped tests.
	  int skipped_test_count() const;
	
	  // Gets the number of failed tests.
	  int failed_test_count() const;
	
	  // Gets the number of disabled tests that will be reported in the XML report.
	  int reportable_disabled_test_count() const;
	
	  // Gets the number of disabled tests.
	  int disabled_test_count() const;
	
	  // Gets the number of tests to be printed in the XML report.
	  int reportable_test_count() const;
	
	  // Gets the number of all tests.
	  int total_test_count() const;
	
	  // Gets the number of tests that should run.
	  int test_to_run_count() const;
	
	  // Gets the time of the test program start, in ms from the start of the
	  // UNIX epoch.
	  TimeInMillis start_timestamp() const;
	
	  // Gets the elapsed time, in milliseconds.
	  TimeInMillis elapsed_time() const;
	
	  // Returns true if the unit test passed (i.e. all test suites passed).
	  bool Passed() const;
	
	  // Returns true if the unit test failed (i.e. some test suite failed
	  // or something outside of all tests failed).
	  bool Failed() const;
	
	  // Gets the i-th test suite among all the test suites. i can range from 0 to
	  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
	  const TestSuite* GetTestSuite(int i) const;
	
	//  Legacy API is deprecated but still available
	#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	  const TestCase* GetTestCase(int i) const;
	#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
	
	  // Returns the TestResult containing information on test failures and
	  // properties logged outside of individual test suites.
	  const TestResult& ad_hoc_test_result() const;
	
	  // Returns the list of event listeners that can be used to track events
	  // inside Google Test.
	  TestEventListeners& listeners();
	
	 private:
	  // Registers and returns a global test environment.  When a test
	  // program is run, all global test environments will be set-up in
	  // the order they were registered.  After all tests in the program
	  // have finished, all global test environments will be torn-down in
	  // the *reverse* order they were registered.
	  //
	  // The UnitTest object takes ownership of the given environment.
	  //
	  // This method can only be called from the main thread.
	  Environment* AddEnvironment(Environment* env);
	
	  // Adds a TestPartResult to the current TestResult object.  All
	  // Google Test assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc)
	  // eventually call this to report their results.  The user code
	  // should use the assertion macros instead of calling this directly.
	  void AddTestPartResult(TestPartResult::Type result_type,
	                         const char* file_name,
	                         int line_number,
	                         const std::string& message,
	                         const std::string& os_stack_trace)
	      GTEST_LOCK_EXCLUDED_(mutex_);
	
	  // Adds a TestProperty to the current TestResult object when invoked from
	  // inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
	  // from SetUpTestSuite or TearDownTestSuite, or to the global property set
	  // when invoked elsewhere.  If the result already contains a property with
	  // the same key, the value will be updated.
	  void RecordProperty(const std::string& key, const std::string& value);
	
	  // Gets the i-th test suite among all the test suites. i can range from 0 to
	  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
	  TestSuite* GetMutableTestSuite(int i);
	
	  // Accessors for the implementation object.
	  internal::UnitTestImpl* impl() { return impl_; }
	  const internal::UnitTestImpl* impl() const { return impl_; }
	
	  // These classes and functions are friends as they need to access private
	  // members of UnitTest.
	  friend class ScopedTrace;
	  friend class Test;
	  friend class internal::AssertHelper;
	  friend class internal::StreamingListenerTest;
	  friend class internal::UnitTestRecordPropertyTestHelper;
	  friend Environment* AddGlobalTestEnvironment(Environment* env);
	  friend internal::UnitTestImpl* internal::GetUnitTestImpl();
	  friend void internal::ReportFailureInUnknownLocation(
	      TestPartResult::Type result_type,
	      const std::string& message);
	
	  // Creates an empty UnitTest.
	  UnitTest();
	
	  // D'tor
	  virtual ~UnitTest();
	
	  // Pushes a trace defined by SCOPED_TRACE() on to the per-thread
	  // Google Test trace stack.
	  void PushGTestTrace(const internal::TraceInfo& trace)
	      GTEST_LOCK_EXCLUDED_(mutex_);
	
	  // Pops a trace from the per-thread Google Test trace stack.
	  void PopGTestTrace()
	      GTEST_LOCK_EXCLUDED_(mutex_);
	
	  // Protects mutable state in *impl_.  This is mutable as some const
	  // methods need to lock it too.
	  mutable internal::Mutex mutex_;
	
	  // Opaque implementation object.  This field is never changed once
	  // the object is constructed.  We don't mark it as const here, as
	  // doing so will cause a warning in the constructor of UnitTest.
	  // Mutable state in *impl_ is protected by mutex_.
	  internal::UnitTestImpl* impl_;
	
	  // We disallow copying UnitTest.
	  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTest);
	};
	
	// A convenient wrapper for adding an environment for the test
	// program.
	//
	// You should call this before RUN_ALL_TESTS() is called, probably in
	// main().  If you use gtest_main, you need to call this before main()
	// starts for it to take effect.  For example, you can define a global
	// variable like this:
	//
	//   testing::Environment* const foo_env =
	//       testing::AddGlobalTestEnvironment(new FooEnvironment);
	//
	// However, we strongly recommend you to write your own main() and
	// call AddGlobalTestEnvironment() there, as relying on initialization
	// of global variables makes the code harder to read and may cause
	// problems when you register multiple environments from different
	// translation units and the environments have dependencies among them
	// (remember that the compiler doesn't guarantee the order in which
	// global variables from different translation units are initialized).
	inline Environment* AddGlobalTestEnvironment(Environment* env) {
	  return UnitTest::GetInstance()->AddEnvironment(env);
	}
	
	// Initializes Google Test.  This must be called before calling
	// RUN_ALL_TESTS().  In particular, it parses a command line for the
	// flags that Google Test recognizes.  Whenever a Google Test flag is
	// seen, it is removed from argv, and *argc is decremented.
	//
	// No value is returned.  Instead, the Google Test flag variables are
	// updated.
	//
	// Calling the function for the second time has no user-visible effect.
	GTEST_API_ void InitGoogleTest(int* argc, char** argv);
	
	// This overloaded version can be used in Windows programs compiled in
	// UNICODE mode.
	GTEST_API_ void InitGoogleTest(int* argc, wchar_t** argv);
	
	// This overloaded version can be used on Arduino/embedded platforms where
	// there is no argc/argv.
	GTEST_API_ void InitGoogleTest();
	
	namespace internal {
	
	// Separate the error generating code from the code path to reduce the stack
	// frame size of CmpHelperEQ. This helps reduce the overhead of some sanitizers
	// when calling EXPECT_* in a tight loop.
	template <typename T1, typename T2>
	AssertionResult CmpHelperEQFailure(const char* lhs_expression,
	                                   const char* rhs_expression,
	                                   const T1& lhs, const T2& rhs) {
	  return EqFailure(lhs_expression,
	                   rhs_expression,
	                   FormatForComparisonFailureMessage(lhs, rhs),
	                   FormatForComparisonFailureMessage(rhs, lhs),
	                   false);
	}
	
	// This block of code defines operator==/!=
	// to block lexical scope lookup.
	// It prevents using invalid operator==/!= defined at namespace scope.
	struct faketype {};
	inline bool operator==(faketype, faketype) { return true; }
	inline bool operator!=(faketype, faketype) { return false; }
	
	// The helper function for {ASSERT|EXPECT}_EQ.
	template <typename T1, typename T2>
	AssertionResult CmpHelperEQ(const char* lhs_expression,
	                            const char* rhs_expression,
	                            const T1& lhs,
	                            const T2& rhs) {
	  if (lhs == rhs) {
	    return AssertionSuccess();
	  }
	
	  return CmpHelperEQFailure(lhs_expression, rhs_expression, lhs, rhs);
	}
	
	// With this overloaded version, we allow anonymous enums to be used
	// in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous enums
	// can be implicitly cast to BiggestInt.
	GTEST_API_ AssertionResult CmpHelperEQ(const char* lhs_expression,
	                                       const char* rhs_expression,
	                                       BiggestInt lhs,
	                                       BiggestInt rhs);
	
	class EqHelper {
	 public:
	  // This templatized version is for the general case.
	  template <
	      typename T1, typename T2,
	      // Disable this overload for cases where one argument is a pointer
	      // and the other is the null pointer constant.
	      typename std::enable_if<!std::is_integral<T1>::value ||
	                              !std::is_pointer<T2>::value>::type* = nullptr>
	  static AssertionResult Compare(const char* lhs_expression,
	                                 const char* rhs_expression, const T1& lhs,
	                                 const T2& rhs) {
	    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
	  }
	
	  // With this overloaded version, we allow anonymous enums to be used
	  // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous
	  // enums can be implicitly cast to BiggestInt.
	  //
	  // Even though its body looks the same as the above version, we
	  // cannot merge the two, as it will make anonymous enums unhappy.
	  static AssertionResult Compare(const char* lhs_expression,
	                                 const char* rhs_expression,
	                                 BiggestInt lhs,
	                                 BiggestInt rhs) {
	    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
	  }
	
	  template <typename T>
	  static AssertionResult Compare(
	      const char* lhs_expression, const char* rhs_expression,
	      // Handle cases where '0' is used as a null pointer literal.
	      std::nullptr_t /* lhs */, T* rhs) {
	    // We already know that 'lhs' is a null pointer.
	    return CmpHelperEQ(lhs_expression, rhs_expression, static_cast<T*>(nullptr),
	                       rhs);
	  }
	};
	
	// Separate the error generating code from the code path to reduce the stack
	// frame size of CmpHelperOP. This helps reduce the overhead of some sanitizers
	// when calling EXPECT_OP in a tight loop.
	template <typename T1, typename T2>
	AssertionResult CmpHelperOpFailure(const char* expr1, const char* expr2,
	                                   const T1& val1, const T2& val2,
	                                   const char* op) {
	  return AssertionFailure()
	         << "Expected: (" << expr1 << ") " << op << " (" << expr2
	         << "), actual: " << FormatForComparisonFailureMessage(val1, val2)
	         << " vs " << FormatForComparisonFailureMessage(val2, val1);
	}
	
	// A macro for implementing the helper functions needed to implement
	// ASSERT_?? and EXPECT_??.  It is here just to avoid copy-and-paste
	// of similar code.
	//
	// For each templatized helper function, we also define an overloaded
	// version for BiggestInt in order to reduce code bloat and allow
	// anonymous enums to be used with {ASSERT|EXPECT}_?? when compiled
	// with gcc 4.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	
	#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
	template <typename T1, typename T2>\
	AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
	                                   const T1& val1, const T2& val2) {\
	  if (val1 op val2) {\
	    return AssertionSuccess();\
	  } else {\
	    return CmpHelperOpFailure(expr1, expr2, val1, val2, #op);\
	  }\
	}\
	GTEST_API_ AssertionResult CmpHelper##op_name(\
	    const char* expr1, const char* expr2, BiggestInt val1, BiggestInt val2)
	
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	
	// Implements the helper function for {ASSERT|EXPECT}_NE
	GTEST_IMPL_CMP_HELPER_(NE, !=);
	// Implements the helper function for {ASSERT|EXPECT}_LE
	GTEST_IMPL_CMP_HELPER_(LE, <=);
	// Implements the helper function for {ASSERT|EXPECT}_LT
	GTEST_IMPL_CMP_HELPER_(LT, <);
	// Implements the helper function for {ASSERT|EXPECT}_GE
	GTEST_IMPL_CMP_HELPER_(GE, >=);
	// Implements the helper function for {ASSERT|EXPECT}_GT
	GTEST_IMPL_CMP_HELPER_(GT, >);
	
	#undef GTEST_IMPL_CMP_HELPER_
	
	// The helper function for {ASSERT|EXPECT}_STREQ.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
	                                          const char* s2_expression,
	                                          const char* s1,
	                                          const char* s2);
	
	// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* s1_expression,
	                                              const char* s2_expression,
	                                              const char* s1,
	                                              const char* s2);
	
	// The helper function for {ASSERT|EXPECT}_STRNE.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
	                                          const char* s2_expression,
	                                          const char* s1,
	                                          const char* s2);
	
	// The helper function for {ASSERT|EXPECT}_STRCASENE.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
	                                              const char* s2_expression,
	                                              const char* s1,
	                                              const char* s2);
	
	
	// Helper function for *_STREQ on wide strings.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
	                                          const char* s2_expression,
	                                          const wchar_t* s1,
	                                          const wchar_t* s2);
	
	// Helper function for *_STRNE on wide strings.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
	                                          const char* s2_expression,
	                                          const wchar_t* s1,
	                                          const wchar_t* s2);
	
	}  // namespace internal
	
	// IsSubstring() and IsNotSubstring() are intended to be used as the
	// first argument to {EXPECT,ASSERT}_PRED_FORMAT2(), not by
	// themselves.  They check whether needle is a substring of haystack
	// (NULL is considered a substring of itself only), and return an
	// appropriate error message when they fail.
	//
	// The {needle,haystack}_expr arguments are the stringified
	// expressions that generated the two real arguments.
	GTEST_API_ AssertionResult IsSubstring(
	    const char* needle_expr, const char* haystack_expr,
	    const char* needle, const char* haystack);
	GTEST_API_ AssertionResult IsSubstring(
	    const char* needle_expr, const char* haystack_expr,
	    const wchar_t* needle, const wchar_t* haystack);
	GTEST_API_ AssertionResult IsNotSubstring(
	    const char* needle_expr, const char* haystack_expr,
	    const char* needle, const char* haystack);
	GTEST_API_ AssertionResult IsNotSubstring(
	    const char* needle_expr, const char* haystack_expr,
	    const wchar_t* needle, const wchar_t* haystack);
	GTEST_API_ AssertionResult IsSubstring(
	    const char* needle_expr, const char* haystack_expr,
	    const ::std::string& needle, const ::std::string& haystack);
	GTEST_API_ AssertionResult IsNotSubstring(
	    const char* needle_expr, const char* haystack_expr,
	    const ::std::string& needle, const ::std::string& haystack);
	
	#if GTEST_HAS_STD_WSTRING
	GTEST_API_ AssertionResult IsSubstring(
	    const char* needle_expr, const char* haystack_expr,
	    const ::std::wstring& needle, const ::std::wstring& haystack);
	GTEST_API_ AssertionResult IsNotSubstring(
	    const char* needle_expr, const char* haystack_expr,
	    const ::std::wstring& needle, const ::std::wstring& haystack);
	#endif  // GTEST_HAS_STD_WSTRING
	
	namespace internal {
	
	// Helper template function for comparing floating-points.
	//
	// Template parameter:
	//
	//   RawType: the raw floating-point type (either float or double)
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	template <typename RawType>
	AssertionResult CmpHelperFloatingPointEQ(const char* lhs_expression,
	                                         const char* rhs_expression,
	                                         RawType lhs_value,
	                                         RawType rhs_value) {
	  const FloatingPoint<RawType> lhs(lhs_value), rhs(rhs_value);
	
	  if (lhs.AlmostEquals(rhs)) {
	    return AssertionSuccess();
	  }
	
	  ::std::stringstream lhs_ss;
	  lhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
	         << lhs_value;
	
	  ::std::stringstream rhs_ss;
	  rhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
	         << rhs_value;
	
	  return EqFailure(lhs_expression,
	                   rhs_expression,
	                   StringStreamToString(&lhs_ss),
	                   StringStreamToString(&rhs_ss),
	                   false);
	}
	
	// Helper function for implementing ASSERT_NEAR.
	//
	// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
	GTEST_API_ AssertionResult DoubleNearPredFormat(const char* expr1,
	                                                const char* expr2,
	                                                const char* abs_error_expr,
	                                                double val1,
	                                                double val2,
	                                                double abs_error);
	
	// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
	// A class that enables one to stream messages to assertion macros
	class GTEST_API_ AssertHelper {
	 public:
	  // Constructor.
	  AssertHelper(TestPartResult::Type type,
	               const char* file,
	               int line,
	               const char* message);
	  ~AssertHelper();
	
	  // Message assignment is a semantic trick to enable assertion
	  // streaming; see the GTEST_MESSAGE_ macro below.
	  void operator=(const Message& message) const;
	
	 private:
	  // We put our data in a struct so that the size of the AssertHelper class can
	  // be as small as possible.  This is important because gcc is incapable of
	  // re-using stack space even for temporary variables, so every EXPECT_EQ
	  // reserves stack space for another AssertHelper.
	  struct AssertHelperData {
	    AssertHelperData(TestPartResult::Type t,
	                     const char* srcfile,
	                     int line_num,
	                     const char* msg)
	        : type(t), file(srcfile), line(line_num), message(msg) { }
	
	    TestPartResult::Type const type;
	    const char* const file;
	    int const line;
	    std::string const message;
	
	   private:
	    GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelperData);
	  };
	
	  AssertHelperData* const data_;
	
	  GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelper);
	};
	
	enum GTestColor { COLOR_DEFAULT, COLOR_RED, COLOR_GREEN, COLOR_YELLOW };
	
	GTEST_API_ GTEST_ATTRIBUTE_PRINTF_(2, 3) void ColoredPrintf(GTestColor color,
	                                                            const char* fmt,
	                                                            ...);
	
	}  // namespace internal
	
	// The pure interface class that all value-parameterized tests inherit from.
	// A value-parameterized class must inherit from both ::testing::Test and
	// ::testing::WithParamInterface. In most cases that just means inheriting
	// from ::testing::TestWithParam, but more complicated test hierarchies
	// may need to inherit from Test and WithParamInterface at different levels.
	//
	// This interface has support for accessing the test parameter value via
	// the GetParam() method.
	//
	// Use it with one of the parameter generator defining functions, like Range(),
	// Values(), ValuesIn(), Bool(), and Combine().
	//
	// class FooTest : public ::testing::TestWithParam<int> {
	//  protected:
	//   FooTest() {
	//     // Can use GetParam() here.
	//   }
	//   ~FooTest() override {
	//     // Can use GetParam() here.
	//   }
	//   void SetUp() override {
	//     // Can use GetParam() here.
	//   }
	//   void TearDown override {
	//     // Can use GetParam() here.
	//   }
	// };
	// TEST_P(FooTest, DoesBar) {
	//   // Can use GetParam() method here.
	//   Foo foo;
	//   ASSERT_TRUE(foo.DoesBar(GetParam()));
	// }
	// INSTANTIATE_TEST_SUITE_P(OneToTenRange, FooTest, ::testing::Range(1, 10));
	
	template <typename T>
	class WithParamInterface {
	 public:
	  typedef T ParamType;
	  virtual ~WithParamInterface() {}
	
	  // The current parameter value. Is also available in the test fixture's
	  // constructor.
	  static const ParamType& GetParam() {
	    GTEST_CHECK_(parameter_ != nullptr)
	        << "GetParam() can only be called inside a value-parameterized test "
	        << "-- did you intend to write TEST_P instead of TEST_F?";
	    return *parameter_;
	  }
	
	 private:
	  // Sets parameter value. The caller is responsible for making sure the value
	  // remains alive and unchanged throughout the current test.
	  static void SetParam(const ParamType* parameter) {
	    parameter_ = parameter;
	  }
	
	  // Static value used for accessing parameter during a test lifetime.
	  static const ParamType* parameter_;
	
	  // TestClass must be a subclass of WithParamInterface<T> and Test.
	  template <class TestClass> friend class internal::ParameterizedTestFactory;
	};
	
	template <typename T>
	const T* WithParamInterface<T>::parameter_ = nullptr;
	
	// Most value-parameterized classes can ignore the existence of
	// WithParamInterface, and can just inherit from ::testing::TestWithParam.
	
	template <typename T>
	class TestWithParam : public Test, public WithParamInterface<T> {
	};
	
	// Macros for indicating success/failure in test code.
	
	// Skips test in runtime.
	// Skipping test aborts current function.
	// Skipped tests are neither successful nor failed.
	#define GTEST_SKIP() GTEST_SKIP_("Skipped")
	
	// ADD_FAILURE unconditionally adds a failure to the current test.
	// SUCCEED generates a success - it doesn't automatically make the
	// current test successful, as a test is only successful when it has
	// no failure.
	//
	// EXPECT_* verifies that a certain condition is satisfied.  If not,
	// it behaves like ADD_FAILURE.  In particular:
	//
	//   EXPECT_TRUE  verifies that a Boolean condition is true.
	//   EXPECT_FALSE verifies that a Boolean condition is false.
	//
	// FAIL and ASSERT_* are similar to ADD_FAILURE and EXPECT_*, except
	// that they will also abort the current function on failure.  People
	// usually want the fail-fast behavior of FAIL and ASSERT_*, but those
	// writing data-driven tests often find themselves using ADD_FAILURE
	// and EXPECT_* more.
	
	// Generates a nonfatal failure with a generic message.
	#define ADD_FAILURE() GTEST_NONFATAL_FAILURE_("Failed")
	
	// Generates a nonfatal failure at the given source file location with
	// a generic message.
	#define ADD_FAILURE_AT(file, line) \
	  GTEST_MESSAGE_AT_(file, line, "Failed", \
	                    ::testing::TestPartResult::kNonFatalFailure)
	
	// Generates a fatal failure with a generic message.
	#define GTEST_FAIL() GTEST_FATAL_FAILURE_("Failed")
	
	// Like GTEST_FAIL(), but at the given source file location.
	#define GTEST_FAIL_AT(file, line)         \
	  GTEST_MESSAGE_AT_(file, line, "Failed", \
	                    ::testing::TestPartResult::kFatalFailure)
	
	// Define this macro to 1 to omit the definition of FAIL(), which is a
	// generic name and clashes with some other libraries.
	#if !GTEST_DONT_DEFINE_FAIL
	# define FAIL() GTEST_FAIL()
	#endif
	
	// Generates a success with a generic message.
	#define GTEST_SUCCEED() GTEST_SUCCESS_("Succeeded")
	
	// Define this macro to 1 to omit the definition of SUCCEED(), which
	// is a generic name and clashes with some other libraries.
	#if !GTEST_DONT_DEFINE_SUCCEED
	# define SUCCEED() GTEST_SUCCEED()
	#endif
	
	// Macros for testing exceptions.
	//
	//    * {ASSERT|EXPECT}_THROW(statement, expected_exception):
	//         Tests that the statement throws the expected exception.
	//    * {ASSERT|EXPECT}_NO_THROW(statement):
	//         Tests that the statement doesn't throw any exception.
	//    * {ASSERT|EXPECT}_ANY_THROW(statement):
	//         Tests that the statement throws an exception.
	
	#define EXPECT_THROW(statement, expected_exception) \
	  GTEST_TEST_THROW_(statement, expected_exception, GTEST_NONFATAL_FAILURE_)
	#define EXPECT_NO_THROW(statement) \
	  GTEST_TEST_NO_THROW_(statement, GTEST_NONFATAL_FAILURE_)
	#define EXPECT_ANY_THROW(statement) \
	  GTEST_TEST_ANY_THROW_(statement, GTEST_NONFATAL_FAILURE_)
	#define ASSERT_THROW(statement, expected_exception) \
	  GTEST_TEST_THROW_(statement, expected_exception, GTEST_FATAL_FAILURE_)
	#define ASSERT_NO_THROW(statement) \
	  GTEST_TEST_NO_THROW_(statement, GTEST_FATAL_FAILURE_)
	#define ASSERT_ANY_THROW(statement) \
	  GTEST_TEST_ANY_THROW_(statement, GTEST_FATAL_FAILURE_)
	
	// Boolean assertions. Condition can be either a Boolean expression or an
	// AssertionResult. For more information on how to use AssertionResult with
	// these macros see comments on that class.
	#define EXPECT_TRUE(condition) \
	  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
	                      GTEST_NONFATAL_FAILURE_)
	#define EXPECT_FALSE(condition) \
	  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
	                      GTEST_NONFATAL_FAILURE_)
	#define ASSERT_TRUE(condition) \
	  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
	                      GTEST_FATAL_FAILURE_)
	#define ASSERT_FALSE(condition) \
	  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
	                      GTEST_FATAL_FAILURE_)
	
	// Macros for testing equalities and inequalities.
	//
	//    * {ASSERT|EXPECT}_EQ(v1, v2): Tests that v1 == v2
	//    * {ASSERT|EXPECT}_NE(v1, v2): Tests that v1 != v2
	//    * {ASSERT|EXPECT}_LT(v1, v2): Tests that v1 < v2
	//    * {ASSERT|EXPECT}_LE(v1, v2): Tests that v1 <= v2
	//    * {ASSERT|EXPECT}_GT(v1, v2): Tests that v1 > v2
	//    * {ASSERT|EXPECT}_GE(v1, v2): Tests that v1 >= v2
	//
	// When they are not, Google Test prints both the tested expressions and
	// their actual values.  The values must be compatible built-in types,
	// or you will get a compiler error.  By "compatible" we mean that the
	// values can be compared by the respective operator.
	//
	// Note:
	//
	//   1. It is possible to make a user-defined type work with
	//   {ASSERT|EXPECT}_??(), but that requires overloading the
	//   comparison operators and is thus discouraged by the Google C++
	//   Usage Guide.  Therefore, you are advised to use the
	//   {ASSERT|EXPECT}_TRUE() macro to assert that two objects are
	//   equal.
	//
	//   2. The {ASSERT|EXPECT}_??() macros do pointer comparisons on
	//   pointers (in particular, C strings).  Therefore, if you use it
	//   with two C strings, you are testing how their locations in memory
	//   are related, not how their content is related.  To compare two C
	//   strings by content, use {ASSERT|EXPECT}_STR*().
	//
	//   3. {ASSERT|EXPECT}_EQ(v1, v2) is preferred to
	//   {ASSERT|EXPECT}_TRUE(v1 == v2), as the former tells you
	//   what the actual value is when it fails, and similarly for the
	//   other comparisons.
	//
	//   4. Do not depend on the order in which {ASSERT|EXPECT}_??()
	//   evaluate their arguments, which is undefined.
	//
	//   5. These macros evaluate their arguments exactly once.
	//
	// Examples:
	//
	//   EXPECT_NE(Foo(), 5);
	//   EXPECT_EQ(a_pointer, NULL);
	//   ASSERT_LT(i, array_size);
	//   ASSERT_GT(records.size(), 0) << "There is no record left.";
	
	#define EXPECT_EQ(val1, val2) \
	  EXPECT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
	#define EXPECT_NE(val1, val2) \
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
	#define EXPECT_LE(val1, val2) \
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
	#define EXPECT_LT(val1, val2) \
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
	#define EXPECT_GE(val1, val2) \
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
	#define EXPECT_GT(val1, val2) \
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
	
	#define GTEST_ASSERT_EQ(val1, val2) \
	  ASSERT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
	#define GTEST_ASSERT_NE(val1, val2) \
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
	#define GTEST_ASSERT_LE(val1, val2) \
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
	#define GTEST_ASSERT_LT(val1, val2) \
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
	#define GTEST_ASSERT_GE(val1, val2) \
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
	#define GTEST_ASSERT_GT(val1, val2) \
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
	
	// Define macro GTEST_DONT_DEFINE_ASSERT_XY to 1 to omit the definition of
	// ASSERT_XY(), which clashes with some users' own code.
	
	#if !GTEST_DONT_DEFINE_ASSERT_EQ
	# define ASSERT_EQ(val1, val2) GTEST_ASSERT_EQ(val1, val2)
	#endif
	
	#if !GTEST_DONT_DEFINE_ASSERT_NE
	# define ASSERT_NE(val1, val2) GTEST_ASSERT_NE(val1, val2)
	#endif
	
	#if !GTEST_DONT_DEFINE_ASSERT_LE
	# define ASSERT_LE(val1, val2) GTEST_ASSERT_LE(val1, val2)
	#endif
	
	#if !GTEST_DONT_DEFINE_ASSERT_LT
	# define ASSERT_LT(val1, val2) GTEST_ASSERT_LT(val1, val2)
	#endif
	
	#if !GTEST_DONT_DEFINE_ASSERT_GE
	# define ASSERT_GE(val1, val2) GTEST_ASSERT_GE(val1, val2)
	#endif
	
	#if !GTEST_DONT_DEFINE_ASSERT_GT
	# define ASSERT_GT(val1, val2) GTEST_ASSERT_GT(val1, val2)
	#endif
	
	// C-string Comparisons.  All tests treat NULL and any non-NULL string
	// as different.  Two NULLs are equal.
	//
	//    * {ASSERT|EXPECT}_STREQ(s1, s2):     Tests that s1 == s2
	//    * {ASSERT|EXPECT}_STRNE(s1, s2):     Tests that s1 != s2
	//    * {ASSERT|EXPECT}_STRCASEEQ(s1, s2): Tests that s1 == s2, ignoring case
	//    * {ASSERT|EXPECT}_STRCASENE(s1, s2): Tests that s1 != s2, ignoring case
	//
	// For wide or narrow string objects, you can use the
	// {ASSERT|EXPECT}_??() macros.
	//
	// Don't depend on the order in which the arguments are evaluated,
	// which is undefined.
	//
	// These macros evaluate their arguments exactly once.
	
	#define EXPECT_STREQ(s1, s2) \
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
	#define EXPECT_STRNE(s1, s2) \
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
	#define EXPECT_STRCASEEQ(s1, s2) \
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
	#define EXPECT_STRCASENE(s1, s2)\
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
	
	#define ASSERT_STREQ(s1, s2) \
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
	#define ASSERT_STRNE(s1, s2) \
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
	#define ASSERT_STRCASEEQ(s1, s2) \
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
	#define ASSERT_STRCASENE(s1, s2)\
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
	
	// Macros for comparing floating-point numbers.
	//
	//    * {ASSERT|EXPECT}_FLOAT_EQ(val1, val2):
	//         Tests that two float values are almost equal.
	//    * {ASSERT|EXPECT}_DOUBLE_EQ(val1, val2):
	//         Tests that two double values are almost equal.
	//    * {ASSERT|EXPECT}_NEAR(v1, v2, abs_error):
	//         Tests that v1 and v2 are within the given distance to each other.
	//
	// Google Test uses ULP-based comparison to automatically pick a default
	// error bound that is appropriate for the operands.  See the
	// FloatingPoint template class in gtest-internal.h if you are
	// interested in the implementation details.
	
	#define EXPECT_FLOAT_EQ(val1, val2)\
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
	                      val1, val2)
	
	#define EXPECT_DOUBLE_EQ(val1, val2)\
	  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
	                      val1, val2)
	
	#define ASSERT_FLOAT_EQ(val1, val2)\
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
	                      val1, val2)
	
	#define ASSERT_DOUBLE_EQ(val1, val2)\
	  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
	                      val1, val2)
	
	#define EXPECT_NEAR(val1, val2, abs_error)\
	  EXPECT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
	                      val1, val2, abs_error)
	
	#define ASSERT_NEAR(val1, val2, abs_error)\
	  ASSERT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
	                      val1, val2, abs_error)
	
	// These predicate format functions work on floating-point values, and
	// can be used in {ASSERT|EXPECT}_PRED_FORMAT2*(), e.g.
	//
	//   EXPECT_PRED_FORMAT2(testing::DoubleLE, Foo(), 5.0);
	
	// Asserts that val1 is less than, or almost equal to, val2.  Fails
	// otherwise.  In particular, it fails if either val1 or val2 is NaN.
	GTEST_API_ AssertionResult FloatLE(const char* expr1, const char* expr2,
	                                   float val1, float val2);
	GTEST_API_ AssertionResult DoubleLE(const char* expr1, const char* expr2,
	                                    double val1, double val2);
	
	
	#if GTEST_OS_WINDOWS
	
	// Macros that test for HRESULT failure and success, these are only useful
	// on Windows, and rely on Windows SDK macros and APIs to compile.
	//
	//    * {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}(expr)
	//
	// When expr unexpectedly fails or succeeds, Google Test prints the
	// expected result and the actual result with both a human-readable
	// string representation of the error, if available, as well as the
	// hex result code.
	# define EXPECT_HRESULT_SUCCEEDED(expr) \
	    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
	
	# define ASSERT_HRESULT_SUCCEEDED(expr) \
	    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
	
	# define EXPECT_HRESULT_FAILED(expr) \
	    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
	
	# define ASSERT_HRESULT_FAILED(expr) \
	    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
	
	#endif  // GTEST_OS_WINDOWS
	
	// Macros that execute statement and check that it doesn't generate new fatal
	// failures in the current thread.
	//
	//   * {ASSERT|EXPECT}_NO_FATAL_FAILURE(statement);
	//
	// Examples:
	//
	//   EXPECT_NO_FATAL_FAILURE(Process());
	//   ASSERT_NO_FATAL_FAILURE(Process()) << "Process() failed";
	//
	#define ASSERT_NO_FATAL_FAILURE(statement) \
	    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_FATAL_FAILURE_)
	#define EXPECT_NO_FATAL_FAILURE(statement) \
	    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_NONFATAL_FAILURE_)
	
	// Causes a trace (including the given source file path and line number,
	// and the given message) to be included in every test failure message generated
	// by code in the scope of the lifetime of an instance of this class. The effect
	// is undone with the destruction of the instance.
	//
	// The message argument can be anything streamable to std::ostream.
	//
	// Example:
	//   testing::ScopedTrace trace("file.cc", 123, "message");
	//
	class GTEST_API_ ScopedTrace {
	 public:
	  // The c'tor pushes the given source file location and message onto
	  // a trace stack maintained by Google Test.
	
	  // Template version. Uses Message() to convert the values into strings.
	  // Slow, but flexible.
	  template <typename T>
	  ScopedTrace(const char* file, int line, const T& message) {
	    PushTrace(file, line, (Message() << message).GetString());
	  }
	
	  // Optimize for some known types.
	  ScopedTrace(const char* file, int line, const char* message) {
	    PushTrace(file, line, message ? message : "(null)");
	  }
	
	  ScopedTrace(const char* file, int line, const std::string& message) {
	    PushTrace(file, line, message);
	  }
	
	  // The d'tor pops the info pushed by the c'tor.
	  //
	  // Note that the d'tor is not virtual in order to be efficient.
	  // Don't inherit from ScopedTrace!
	  ~ScopedTrace();
	
	 private:
	  void PushTrace(const char* file, int line, std::string message);
	
	  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedTrace);
	} GTEST_ATTRIBUTE_UNUSED_;  // A ScopedTrace object does its job in its
	                            // c'tor and d'tor.  Therefore it doesn't
	                            // need to be used otherwise.
	
	// Causes a trace (including the source file path, the current line
	// number, and the given message) to be included in every test failure
	// message generated by code in the current scope.  The effect is
	// undone when the control leaves the current scope.
	//
	// The message argument can be anything streamable to std::ostream.
	//
	// In the implementation, we include the current line number as part
	// of the dummy variable name, thus allowing multiple SCOPED_TRACE()s
	// to appear in the same block - as long as they are on different
	// lines.
	//
	// Assuming that each thread maintains its own stack of traces.
	// Therefore, a SCOPED_TRACE() would (correctly) only affect the
	// assertions in its own thread.
	#define SCOPED_TRACE(message) \
	  ::testing::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
	    __FILE__, __LINE__, (message))
	
	
	// Compile-time assertion for type equality.
	// StaticAssertTypeEq<type1, type2>() compiles if type1 and type2 are
	// the same type.  The value it returns is not interesting.
	//
	// Instead of making StaticAssertTypeEq a class template, we make it a
	// function template that invokes a helper class template.  This
	// prevents a user from misusing StaticAssertTypeEq<T1, T2> by
	// defining objects of that type.
	//
	// CAVEAT:
	//
	// When used inside a method of a class template,
	// StaticAssertTypeEq<T1, T2>() is effective ONLY IF the method is
	// instantiated.  For example, given:
	//
	//   template <typename T> class Foo {
	//    public:
	//     void Bar() { testing::StaticAssertTypeEq<int, T>(); }
	//   };
	//
	// the code:
	//
	//   void Test1() { Foo<bool> foo; }
	//
	// will NOT generate a compiler error, as Foo<bool>::Bar() is never
	// actually instantiated.  Instead, you need:
	//
	//   void Test2() { Foo<bool> foo; foo.Bar(); }
	//
	// to cause a compiler error.
	template <typename T1, typename T2>
	bool StaticAssertTypeEq() {
	  (void)internal::StaticAssertTypeEqHelper<T1, T2>();
	  return true;
	}
	
	// Defines a test.
	//
	// The first parameter is the name of the test suite, and the second
	// parameter is the name of the test within the test suite.
	//
	// The convention is to end the test suite name with "Test".  For
	// example, a test suite for the Foo class can be named FooTest.
	//
	// Test code should appear between braces after an invocation of
	// this macro.  Example:
	//
	//   TEST(FooTest, InitializesCorrectly) {
	//     Foo foo;
	//     EXPECT_TRUE(foo.StatusIsOK());
	//   }
	
	// Note that we call GetTestTypeId() instead of GetTypeId<
	// ::testing::Test>() here to get the type ID of testing::Test.  This
	// is to work around a suspected linker bug when using Google Test as
	// a framework on Mac OS X.  The bug causes GetTypeId<
	// ::testing::Test>() to return different values depending on whether
	// the call is from the Google Test framework itself or from user test
	// code.  GetTestTypeId() is guaranteed to always return the same
	// value, as it always calls GetTypeId<>() from the Google Test
	// framework.
	#define GTEST_TEST(test_suite_name, test_name)             \
	  GTEST_TEST_(test_suite_name, test_name, ::testing::Test, \
	              ::testing::internal::GetTestTypeId())
	
	// Define this macro to 1 to omit the definition of TEST(), which
	// is a generic name and clashes with some other libraries.
	#if !GTEST_DONT_DEFINE_TEST
	#define TEST(test_suite_name, test_name) GTEST_TEST(test_suite_name, test_name)
	#endif
	
	// Defines a test that uses a test fixture.
	//
	// The first parameter is the name of the test fixture class, which
	// also doubles as the test suite name.  The second parameter is the
	// name of the test within the test suite.
	//
	// A test fixture class must be declared earlier.  The user should put
	// the test code between braces after using this macro.  Example:
	//
	//   class FooTest : public testing::Test {
	//    protected:
	//     void SetUp() override { b_.AddElement(3); }
	//
	//     Foo a_;
	//     Foo b_;
	//   };
	//
	//   TEST_F(FooTest, InitializesCorrectly) {
	//     EXPECT_TRUE(a_.StatusIsOK());
	//   }
	//
	//   TEST_F(FooTest, ReturnsElementCountCorrectly) {
	//     EXPECT_EQ(a_.size(), 0);
	//     EXPECT_EQ(b_.size(), 1);
	//   }
	//
	// GOOGLETEST_CM0011 DO NOT DELETE
	#define TEST_F(test_fixture, test_name)\
	  GTEST_TEST_(test_fixture, test_name, test_fixture, \
	              ::testing::internal::GetTypeId<test_fixture>())
	
	// Returns a path to temporary directory.
	// Tries to determine an appropriate directory for the platform.
	GTEST_API_ std::string TempDir();
	
	#ifdef _MSC_VER
	#  pragma warning(pop)
	#endif
	
	// Dynamically registers a test with the framework.
	//
	// This is an advanced API only to be used when the `TEST` macros are
	// insufficient. The macros should be preferred when possible, as they avoid
	// most of the complexity of calling this function.
	//
	// The `factory` argument is a factory callable (move-constructible) object or
	// function pointer that creates a new instance of the Test object. It
	// handles ownership to the caller. The signature of the callable is
	// `Fixture*()`, where `Fixture` is the test fixture class for the test. All
	// tests registered with the same `test_suite_name` must return the same
	// fixture type. This is checked at runtime.
	//
	// The framework will infer the fixture class from the factory and will call
	// the `SetUpTestSuite` and `TearDownTestSuite` for it.
	//
	// Must be called before `RUN_ALL_TESTS()` is invoked, otherwise behavior is
	// undefined.
	//
	// Use case example:
	//
	// class MyFixture : public ::testing::Test {
	//  public:
	//   // All of these optional, just like in regular macro usage.
	//   static void SetUpTestSuite() { ... }
	//   static void TearDownTestSuite() { ... }
	//   void SetUp() override { ... }
	//   void TearDown() override { ... }
	// };
	//
	// class MyTest : public MyFixture {
	//  public:
	//   explicit MyTest(int data) : data_(data) {}
	//   void TestBody() override { ... }
	//
	//  private:
	//   int data_;
	// };
	//
	// void RegisterMyTests(const std::vector<int>& values) {
	//   for (int v : values) {
	//     ::testing::RegisterTest(
	//         "MyFixture", ("Test" + std::to_string(v)).c_str(), nullptr,
	//         std::to_string(v).c_str(),
	//         __FILE__, __LINE__,
	//         // Important to use the fixture type as the return type here.
	//         [=]() -> MyFixture* { return new MyTest(v); });
	//   }
	// }
	// ...
	// int main(int argc, char** argv) {
	//   std::vector<int> values_to_test = LoadValuesFromConfig();
	//   RegisterMyTests(values_to_test);
	//   ...
	//   return RUN_ALL_TESTS();
	// }
	//
	template <int&... ExplicitParameterBarrier, typename Factory>
	TestInfo* RegisterTest(const char* test_suite_name, const char* test_name,
	                       const char* type_param, const char* value_param,
	                       const char* file, int line, Factory factory) {
	  using TestT = typename std::remove_pointer<decltype(factory())>::type;
	
	  class FactoryImpl : public internal::TestFactoryBase {
	   public:
	    explicit FactoryImpl(Factory f) : factory_(std::move(f)) {}
	    Test* CreateTest() override { return factory_(); }
	
	   private:
	    Factory factory_;
	  };
	
	  return internal::MakeAndRegisterTestInfo(
	      test_suite_name, test_name, type_param, value_param,
	      internal::CodeLocation(file, line), internal::GetTypeId<TestT>(),
	      internal::SuiteApiResolver<TestT>::GetSetUpCaseOrSuite(file, line),
	      internal::SuiteApiResolver<TestT>::GetTearDownCaseOrSuite(file, line),
	      new FactoryImpl{std::move(factory)});
	}
	
	}  // namespace testing
	
	// Use this function in main() to run all tests.  It returns 0 if all
	// tests are successful, or 1 otherwise.
	//
	// RUN_ALL_TESTS() should be invoked after the command line has been
	// parsed by InitGoogleTest().
	//
	// This function was formerly a macro; thus, it is in the global
	// namespace and has an all-caps name.
	int RUN_ALL_TESTS() GTEST_MUST_USE_RESULT_;
	
	inline int RUN_ALL_TESTS() {

	  return ::testing::UnitTest::GetInstance()->Run();
	}
	
	GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
	
	#endif  // GTEST_INCLUDE_GTEST_GTEST_H_