Testing

The package's tests

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

The unit suite, under tests/Unit, checks the reading of configurations and every refusal, the round ticks of the scale, the legend, the thinning of labels, the arcs of slices, and whole images against golden files in tests/Unit/Fixture, which were looked at when they were written. In the monorepo, Infection holds the package at 100 % of covered mutants.

Testing code that draws charts

The image is deterministic: compare it with a golden file, or look for the <title> of a mark.