Testing

The library's tests

composer install
vendor/bin/phpunit --no-configuration tests

The suite checks every distribution of a set of dice against all of its rolls, each judged by the roller of tilttek/dice as a list of values with the same modifiers; the explosions, rerolls, counts rolled first and arithmetic against probabilities worked by hand; the events against the reference example and the counts of their rolls; the estimates and their seeds; and the exact numbers. In the monorepo, Infection holds the library at 100 % of covered mutants.

Testing code that uses probabilities

The results are exact: compare fractions as text, '16/36', or by value with equals(). An estimate depends only on its seed and its number of samples: pass new Settings(samples: 200, seed: 42) and the same estimate comes back, quickly. To force an estimate, pass a small work limit: new Settings(workLimit: 1).