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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkTestConditionals_txx
#define vtkTestConditionals_txx
namespace vtk
{
VTK_ABI_NAMESPACE_BEGIN
/**\brief Conditionals for use in unit tests.
*
* These templated functions all return boolean values: true
* when the test passes and false when the test fails.
*
* Each prints out a message string you pass to it followed
* either by "ok" or "failed".
* If the string is empty, no message is printed.
*/
//@{
/**\brief Return true when \a a and \a b are equal; false otherwise.
*
* This tests for exact equality, so it is generally unwise to
* use this for floating point number comparison.
*/
template <typename T>
inline bool testEqual(const T& a, const T& b, const std::string& msg)
{
bool print = !msg.empty();
if (print)
{
std::cout << msg << ": ";
}
if (a == b)
{
if (print)
{
std::cout << "ok\n";
}
return true;
}
if (print)
{
std::cout << "failed\n";
}
std::cerr << " ERROR: " << a << " != " << b << "\n";
return false;
}
template <typename T>
inline bool testNotEqual(const T& a, const T& b, const std::string& msg)
{
bool print = !msg.empty();
if (print)
{
std::cout << msg << ": ";
}
if (a != b)
{
if (print)
{
std::cout << "ok\n";
}
return true;
}
if (print)
{
std::cout << "failed\n";
}
std::cerr << " ERROR: " << a << " == " << b << "\n";
return false;
}
template <typename T>
inline bool testNotNull(const T& a, const std::string& msg)
{
bool print = !msg.empty();
if (print)
{
std::cout << msg << ": ";
}
if (a != nullptr)
{
if (print)
{
std::cout << "ok\n";
}
return true;
}
if (print)
{
std::cout << "failed\n";
}
std::cerr << " ERROR: NULL pointer\n";
return false;
}
/**\brief Test two values for equality to within a tolerance.
*
* This test is useful for floating-point values.
* It also has specializations for vtkVector2d and vtkVector3d that
* make it useful for comparing points or vectors.
*
* It can be used for any type where a subtraction operator
* exists whose return value is implicitly castable to a
* double-precision number.
*
* The threshold (whose default is 1e-8) is an absolute number;
* no normalization relative to the input values \a a and \a b
* is done.
*/
template <typename T>
inline bool testNearlyEqual(const T& a, const T& b, const std::string& msg, double thresh = 1e-8)
{
bool print = !msg.empty();
if (print)
{
std::cout << msg << ": ";
}
double diff = a - b;
if (std::abs(diff) < thresh)
{
if (print)
{
std::cout << "ok\n";
}
return true;
}
if (print)
{
std::cout << "failed\n";
}
std::cerr << " ERROR: abs(" << a << " - " << b << " = " << diff << ") > " << thresh << "\n";
return false;
}
template <>
inline bool testNearlyEqual(
const vtkVector2d& a, const vtkVector2d& b, const std::string& msg, double thresh)
{
bool print = !msg.empty();
if (print)
{
std::cout << msg << ": ";
}
double diff = (a - b).Norm();
if (std::abs(diff) < thresh)
{
if (print)
{
std::cout << "ok\n";
}
return true;
}
if (print)
{
std::cout << "failed\n";
}
std::cerr << " ERROR: abs(" << a << " - " << b << " = " << diff << ") > " << thresh << "\n";
return false;
}
template <>
inline bool testNearlyEqual(
const vtkVector3d& a, const vtkVector3d& b, const std::string& msg, double thresh)
{
bool print = !msg.empty();
if (print)
{
std::cout << msg << ": ";
}
double diff = (a - b).Norm();
if (std::abs(diff) < thresh)
{
if (print)
{
std::cout << "ok\n";
}
return true;
}
if (print)
{
std::cout << "failed\n";
}
std::cerr << " ERROR: abs(" << a << " - " << b << " = " << diff << ") > " << thresh << "\n";
return false;
}
VTK_ABI_NAMESPACE_END
} // namespace vtk
#endif // vtkTestConditionals_txx
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