Belle2::TestHelpers Namespace Reference

Some utilities to help with writing unit tests. More...

Classes
class	LogMessageTest
	Test fixture to be able to check the contents and types of emitted log messages in detail. More...
class	TempDirCreator
	changes working directory into a newly created directory, and removes it (and contents) on destruction. More...
class	TestWithGearbox
	This class provides a test fixture managing the opening and closing of the Gearbox with the default geometry file. More...

Functions
template<>
bool	allNear< Belle2::Helix > (const Belle2::Helix &expected, const Belle2::Helix &actual, double tolerance)
	Predicate checking that all five components of the Helix are close by a maximal error of absError.
bool	angleNear (double expected, double actual, double tolerance)
	Predicate checking that two angular values are close to each other modulus a 2 * PI difference.
bool	sameSign (double expected, double actual)
	Predicate checking that two values have the same sign.
bool	isPositive (double expected)
	Predicate checking that a value is bigger than zero.
bool	isNegative (double expected)
	Predicate checking that a value is smaller than zero.
template<class T >
bool	allNear (const T &expected, const T &actual, double tolerance)
	Templated version of predicate checking if two combound object containing some floating point are near each other by maximum deviation.
template<>
bool	allNear< ROOT::Math::XYZVector > (const ROOT::Math::XYZVector &expected, const ROOT::Math::XYZVector &actual, double tolerance)
	Predicate checking that all three components of XYZVector are close by a maximal error of tolerance.
void	PrintTo (const TVector3 &tVector3, ::std::ostream &output)
	Print function for the google test framework to print a TVector3 to an output stream.
template<>
bool	allNear< TrackFindingCDC::Vector3D > (const TrackFindingCDC::Vector3D &expected, const TrackFindingCDC::Vector3D &actual, double tolerance)
	Predicate checking that all three components of Vector3D are close by a maximal error of tolerance.

Detailed Description

Some utilities to help with writing unit tests.

It is possible to nest these macros with others to test two things, e.g.:

EXPECT_B2ERROR(EXPECT_DOUBLE_EQ(5e3, Unit::convertValue(5e3, "nonexistingunit")));

Function Documentation

allNear()

bool allNear	(	const T &	expected,
		const T &	actual,
		double	tolerance
	)

Templated version of predicate checking if two combound object containing some floating point are near each other by maximum deviation.

Concrete implementations can be given as simple overloads of the allNear function.

Definition at line 268 of file TestHelpers.h.

    {
      using std::fabs;
      return fabs(expected - actual) < tolerance;
    }

allNear< Belle2::Helix >()

bool allNear< Belle2::Helix >	(	const Belle2::Helix &	expected,
		const Belle2::Helix &	actual,
		double	tolerance
	)

Predicate checking that all five components of the Helix are close by a maximal error of absError.

Extends the EXPECT_ALL_NEAR/ASSERT_ALL_NEAR macro in the framework testhelpers to work for the helix class

Definition at line 40 of file Helix.cc.

  {
    bool d0Near = fabs(expected.getD0() - actual.getD0()) < tolerance;
    bool phi0Near = angleNear(expected.getPhi0(), actual.getPhi0(), tolerance);
    bool omegaNear = fabs(expected.getOmega() - actual.getOmega()) < tolerance;
    bool z0Near = fabs(expected.getZ0() - actual.getZ0()) < tolerance;
    bool tanLambdaNear = fabs(expected.getTanLambda() - actual.getTanLambda()) < tolerance;
 
    return d0Near and phi0Near and omegaNear and z0Near and tanLambdaNear;
  }

angleNear()

bool angleNear	(	double	expected,
		double	actual,
		double	tolerance
	)

Predicate checking that two angular values are close to each other modulus a 2 * PI difference.

Definition at line 72 of file TestHelpers.cc.

{
  return fabs(remainder(expected - actual, 2 * M_PI)) < absError;
}

isNegative()

bool isNegative

(

double

expected

)

Predicate checking that a value is smaller than zero.

Definition at line 91 of file TestHelpers.cc.

{
  return expected < 0;
}

isPositive()

bool isPositive

(

double

expected

)

Predicate checking that a value is bigger than zero.

Definition at line 86 of file TestHelpers.cc.

{
  return expected > 0;
}

PrintTo()

void PrintTo	(	const TVector3 &	tVector3,
		::std::ostream &	output
	)

Print function for the google test framework to print a TVector3 to an output stream.

Definition at line 107 of file TestHelpers.cc.

{
  output
      << "TVector3("
      << tVector3.X() << ", "
      << tVector3.Y() << ", "
      << tVector3.Z() << ")";
}

sameSign()

bool sameSign	(	double	expected,
		double	actual
	)

Predicate checking that two values have the same sign.

Returns nan if any of the values is nan.

Definition at line 77 of file TestHelpers.cc.

{
  if (std::isnan(expected) or std::isnan(actual)) return false;
  using boost::math::sign;
  int expectedSign = sign(expected);
  int actualSign = sign(actual);
  return expectedSign == actualSign;
}