// Package test contains helpers for testing parsers.
package test

import "io"

type errReaderAt struct {
	err error
}

func (r errReaderAt) ReadAt([]byte, int64) (int, error) {
	return 0, r.err
}

// ErrReaderAt returns an [io.ReaderAt] with a ReadAt method that always returns err.
func ErrReaderAt(err error) io.ReaderAt {
	return errReaderAt{err: err}
}