gigaparsec/test/generator/gen.go

package generator

import (
	"errors"

	"pgregory.net/rapid"
)

// Error returns a new error created by calling [errors.New] with a random string.
func Error() *rapid.Generator[error] {
	return rapid.Map(rapid.String(), errors.New)
}

// SliceOfNZero returns a generator that makes slices of the zero value of T.
// The range of slice lengths are determined as in [rapid.SliceOfN].
func SliceOfNZero[T any](minLen, maxLen int) *rapid.Generator[[]T] {
	return rapid.Map(rapid.IntRange(minLen, maxLen), func(n int) []T {
		return make([]T, n)
	})
}