package tool

import (
	"strings"
	"testing"

	"github.com/google/go-cmp/cmp"
	"github.com/stretchr/testify/assert"
)

type otherString string

func (x otherString) Equal(y otherString) bool {
	return strings.EqualFold(string(x), string(y))
}

func TestOptionAvoidEqualMethod(t *testing.T) {
	type myString otherString

	// This transformer converts otherString to myString, allowing Equal to use
	// other Options to determine equality.
	trans := cmp.Transformer("", func(in otherString) myString {
		return myString(in)
	})

	x := []otherString{"foo", "bar", "baz"}
	y := []otherString{"fOO", "bAr", "Baz"} // Same as before, but with different case

	assert.True(t, cmp.Equal(x, y))         // Equal because of case-insensitivity
	assert.False(t, cmp.Equal(x, y, trans)) // Not equal because of more exact equality
}