package nomino

import (
	"errors"
	"testing"

	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
)

func TestUUID(t *testing.T) {
	st, err := UUID(nil)(nil)
	assert.NoError(t, err)
	_, parseErr := uuid.Parse(st)
	assert.NoError(t, parseErr)
}

type badRead struct{}

func (badRead) Read([]byte) (int, error) {
	return 0, errors.New("sorry")
}

func TestUUIDFail(t *testing.T) {
	uuid.SetRand(badRead{})
	defer uuid.SetRand(nil)

	_, err := UUID(nil)(nil)
	assert.Equal(t, errors.New("sorry"), err)
}

func TestRand(t *testing.T) {
	st, err := Random()(nil)
	assert.NoError(t, err)
	assert.Len(t, st, 8)
}

func TestRandLen(t *testing.T) {
	st, err := Random(RandomLength(32))(nil)
	assert.NoError(t, err)
	assert.Len(t, st, 32)
}