import mir.math.common: approxEqual, log;

assert(0.5.betaLPDF(1, 1).approxEqual(log(betaPDF(0.5, 1, 1))));
assert(0.75.betaLPDF(1, 2).approxEqual(log(betaPDF(0.75, 1, 2))));
assert(0.25.betaLPDF(0.5, 4).approxEqual(log(betaPDF(0.25, 0.5, 4))));