package main

import (
	"github.com/stretchr/testify/assert"
	"testing"
)

func TestLongestDupSubstring(t *testing.T) {
	assert.Equal(t, "ana", LongestDupSubstring("banana"))
	assert.Equal(t, "", LongestDupSubstring("abcd"))
	assert.Equal(t, "aaa", LongestDupSubstring("aaaa"))
	assert.Equal(t, "", LongestDupSubstring(""))
	assert.Equal(t, "", LongestDupSubstring("a"))
	assert.Equal(t, "x", LongestDupSubstring("xx"))
	assert.Equal(t, "xx", LongestDupSubstring("xxx"))
	assert.Equal(t, "bananab", LongestDupSubstring("bananabananab"))
	assert.Equal(t, "sfd", LongestDupSubstring("polxtvqlurgobbzbjcjsupskvzmtuveuavrzcxaifmdwqjbuejdasuxcvsupqnucorfawncjqkbakilhiekavhmsjbtlsfydijafxhgrgbsswtnvdquwokcliaxevairergwdtndsibiulqiutkcwsqpzuyypnhiowgvkkdbpkoyvgwyuqcokjnxluamwnuhqjtaossezwxvkpdkqcleqjkelcludtbigxkueupnxjncrbgvdrsdpppqqcopnwadqsxkvlkghfmtvdeygpyxamvxhmmaunxskgnenobvnzizbxwrjeedisrgzykoaidiffzqzsmirxkvfwmtifywamcpxziyjohcudzelgbmdgiaqwnzdbkwbhdioiokaivzlzscshrvbmggdztjuimribrgmdlcctvldbcxwpqnqbkzrcayqdqraobqcgoxxocclasphcjcydpkgkqhrmmxtklpxfxnrgnzczjxanaltnjhwfatgryqhcllemgqcchiagizpdgiqioqyhrpattutmuotrcwtxvdqzzsomofizebbqrgwruydyawsssjkakjpjlzmfhmjetymftxrhilpcgfqyoohyydnodfortlkeoncmfkdraiqydxcodyapjaxumjwczwmthrcecfgsswwtnyqurvggamjbsjdzmcuyefwnsrnhhpusfdsxbsrsrywbccullupdbovnmzluqsfdhqbef"))
}