package phoneletters_test

import (
	"testing"

	"git.jxs.me/leetgo/phoneletters"
	"github.com/stretchr/testify/require"
)

func TestEm(t *testing.T) {
	require.Equal(t, []string{}, phoneletters.Combinations(""))
}

func TestSingle(t *testing.T) {
	require.Equal(t, []string{"a", "b", "c"}, phoneletters.Combinations("2"))
}

func TestDoble(t *testing.T) {
	expected := []string{
		"ad", "ae", "af",
		"bd", "be", "bf",
		"cd", "ce", "cf",
	}

	require.Equal(t, expected, phoneletters.Combinations("23"))
}