Tests using c++ templates

[MarcelInTO]

It would be useful to be able to define a test that uses C++ templates to test template functions. For example, if I have a function like this:

template <typename T>
inline bool isSubnormal(const T & v)
{
    return std::isfinite(v) && !std::isnormal(v) && v != T(0.0);
}

Currently, my tests look like this:

CESTER_TEST(isSubnormalFloatWithSubnormalInput, inst,
    float p1 = std::numeric_limits<float>::min() / float(2.0);
    cester_assert_true(isSubnormal(p1));
)
CESTER_TEST(isSubnormalDoubleWithSubnormalInput, inst,
    double p1 = std::numeric_limits<double>::min() / double(2.0);
    cester_assert_true(isSubnormal(p1));
)

It would be great to do something like:

CESTER_TEMPLATE_TEST(isSubnormalWithSubnormalInput, inst, T, (float, double, long double),
    T p1 = std::numeric_limits<T>::min() / T(2.0);
    cester_assert_true(isSubnormal(p1));
)

Basically - add parameters specifying the template variable and the list of types to instantiate.

It would have to generate names for each of the tests that include an indication what T was for that test.

I have not really thought through the ideal syntax, because if you have more than one template variable, my suggested syntax is not very practical, but you get the idea.....

[Thecarisma]

Great, I totally get the idea. I'll implement this + other possible generators in an upcoming release.

On Wed, Mar 10, 2021 at 9:42 PM MarcelInTO [email protected] wrote:

It would be useful to be able to define a test that uses C++ templates to test template functions. For example, if I have a function like this:

template inline bool isSubnormal(const T & v) { return std::isfinite(v) && !std::isnormal(v) && v != T(0.0); }

Currently, my tests look like this:

CESTER_TEST(isSubnormalFloatWithSubnormalInput, inst, float p1 = std::numeric_limits::min() / float(2.0); cester_assert_true(isSubnormal(p1)); ) CESTER_TEST(isSubnormalDoubleWithSubnormalInput, inst, double p1 = std::numeric_limits::min() / double(2.0); cester_assert_true(isSubnormal(p1)); )

It would be great to do something like:

CESTER_TEMPLATE_TEST(isSubnormalWithSubnormalInput, inst, T, (float, double, long double), T p1 = std::numeric_limits::min() / T(2.0); cester_assert_true(isSubnormal(p1)); )

Basically - add parameters specifying the template variable and the list of types to instantiate.

It would have to generate names for each of the tests that include an indication what T was for that test.

I have not really thought through the ideal syntax, because if you have more than one template variable, my suggested syntax is not very practical, but you get the idea.....

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