package longestprefix_test

import (
	"testing"

	"git.jxs.me/leetgo/longestprefix"
)

func TestEmpty(t *testing.T) {
	expected := ""
	result := longestprefix.LongestCommonPrefix([]string{})

	if expected != result {
		t.Errorf("%q != %q", expected, result)
	}
}

func TestSingle(t *testing.T) {
	expected := "bark"
	result := longestprefix.LongestCommonPrefix([]string{
		"bark",
	})

	if expected != result {
		t.Errorf("%q != %q", expected, result)
	}
}

func TestSimple(t *testing.T) {
	expected := "ye"
	result := longestprefix.LongestCommonPrefix([]string{
		"yes",
		"yeet",
	})

	if expected != result {
		t.Errorf("%q != %q", expected, result)
	}
}

func TestExample(t *testing.T) {
	expected := "fl"
	result := longestprefix.LongestCommonPrefix([]string{
		"flower",
		"flow",
		"flight",
	})

	if expected != result {
		t.Errorf("%q != %q", expected, result)
	}
}