howitworks-others.js

miniFc.boolean = () => map(
    miniFc.integer(0, 1),
    Boolean,
    b => b ? 1 : 0,
)
miniFc.character = () => map(
    miniFc.integer(0, 25),
    n => String.fromCharCode(97 + n),
    c => c.codePointAt(0) - 97,
)
miniFc.string = () => map(
    miniFc.array(miniFc.character()),
    characters => characters.join(''),
    s => s.split('')
)
miniFc.dictionary = (valueGenerator) => map(
    miniFc.array(miniFc.tuple(miniFc.string(), valueGenerator)),
    Object.fromEntries,
    Object.entries,
)

// > [...miniFc.boolean().shrink(true)]
// > [...miniFc.character().shrink("h")]
// > [...miniFc.string().shrink("hello")]
// > [...miniFc.dictionary(miniFc.string()).shrink({"hello": "world"})]