withGen

Usage: withGen(spec, genFn)

Takes a spec and a no-arg, generator-returning fn and returns a version of that spec that uses that generator

Source

Example:

const s = require('speculaas');
const testcheck = require('testcheck');

// Only generate integers in the [5, 7) range
const gen = () => testcheck.gen.intWithin(5, 7);

const spec = s.withGen(s.intIn(0, 10), gen);