Macro common_tests 

macro_rules! common_tests {
    ($name:ident, $call:expr) => { ... };
}

Generate the three most-common tests (empty-input, mask propagation, bulk-vs-scalar) for a fn kernel(&[f64]) -> FloatArray<f64>.

Usage:

common_tests!(normal_pdf, |x| normal_pdf(x, 0.0, 1.0, None, None).unwrap());