testing::internal::Random Class Reference

#include <gtest-internal.h>

Public Member Functions
	Random (UInt32 seed)
void	Reseed (UInt32 seed)
UInt32	Generate (UInt32 range)
	Random (UInt32 seed)
void	Reseed (UInt32 seed)
UInt32	Generate (UInt32 range)
	Random (UInt32 seed)
void	Reseed (UInt32 seed)
UInt32	Generate (UInt32 range)

Static Public Attributes
static const UInt32	kMaxRange = 1u << 31

Private Member Functions
	GTEST_DISALLOW_COPY_AND_ASSIGN_ (Random)
	GTEST_DISALLOW_COPY_AND_ASSIGN_ (Random)
	GTEST_DISALLOW_COPY_AND_ASSIGN_ (Random)

Private Attributes
UInt32	state_

Detailed Description

Definition at line 752 of file gtest-internal.h.

Constructor & Destructor Documentation

testing::internal::Random::Random ( UInt32  seed )

inlineexplicit

Definition at line 756 of file gtest-internal.h.

: state_(seed) {}

testing::internal::Random::Random ( UInt32  seed )

inlineexplicit

Definition at line 756 of file gtest-internal.h.

: state_(seed) {}

testing::internal::Random::Random ( UInt32  seed )

inlineexplicit

Definition at line 756 of file gtest-internal.h.

: state_(seed) {}

Member Function Documentation

UInt32 Random::Generate

(

UInt32

range

)

Definition at line 311 of file gtest.cc.

References GTEST_CHECK_, and folly::gen::range().

Referenced by testing::GetDefaultFilter(), operator<<(), testing::internal::ShuffleRange(), and testing::internal::GTestFlagSaver::~GTestFlagSaver().

                                    {
  // These constants are the same as are used in glibc's rand(3).
  state_ = (1103515245U*state_ + 12345U) % kMaxRange;

  GTEST_CHECK_(range > 0)
      << "Cannot generate a number in the range [0, 0).";
  GTEST_CHECK_(range <= kMaxRange)
      << "Generation of a number in [0, " << range << ") was requested, "
      << "but this can only generate numbers in [0, " << kMaxRange << ").";

  // Converting via modulus introduces a bit of downward bias, but
  // it's simple, and a linear congruential generator isn't too good
  // to begin with.
  return state_ % range;
}

UInt32 testing::internal::Random::Generate

(

UInt32

range

)

UInt32 testing::internal::Random::Generate

(

UInt32

range

)

testing::internal::Random::GTEST_DISALLOW_COPY_AND_ASSIGN_ ( Random  )

private

testing::internal::Random::GTEST_DISALLOW_COPY_AND_ASSIGN_ ( Random  )

private

testing::internal::Random::GTEST_DISALLOW_COPY_AND_ASSIGN_ ( Random  )

private

void testing::internal::Random::Reseed ( UInt32  seed )

inline

Definition at line 758 of file gtest-internal.h.

References GTEST_DISALLOW_COPY_AND_ASSIGN_, folly::gen::range(), and seed.

{ state_ = seed; }

void testing::internal::Random::Reseed ( UInt32  seed )

inline

Definition at line 758 of file gtest-internal.h.

References folly::gen::range(), and seed.

Referenced by operator<<(), and testing::internal::UnitTestImpl::RunAllTests().

{ state_ = seed; }

void testing::internal::Random::Reseed ( UInt32  seed )

inline

Definition at line 758 of file gtest-internal.h.

References GTEST_DISALLOW_COPY_AND_ASSIGN_, folly::gen::range(), and seed.

{ state_ = seed; }

Member Data Documentation

static const UInt32 Random::kMaxRange = 1u << 31

static

Definition at line 754 of file gtest-internal.h.

Referenced by operator<<().

UInt32 Random::state_

private

Definition at line 765 of file gtest-internal.h.

---

The documentation for this class was generated from the following files:

• proxygen/fizz/build_/gtest/src/gtest/googletest/include/gtest/internal/gtest-internal.h
• proxygen/fizz/build_/gtest/src/gtest/googletest/src/gtest.cc