kmp_test.go

//The MIT License (MIT)
//Copyright (c) 2015 Evan Lin
//Permission is hereby granted, free of charge, to any person obtaining a copy
//of this software and associated documentation files (the "Software"), to deal
//in the Software without restriction, including without limitation the rights
//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//copies of the Software, and to permit persons to whom the Software is
//furnished to do so, subject to the following conditions:
//The above copyright notice and this permission notice shall be included in all
//copies or substantial portions of the Software.
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//SOFTWARE.

package kmp

import (
	"fmt"
	"testing"
)

func TestPreKMP(t *testing.T) {
	ret := preKMP("cocacola")
	if len(ret) > 5 && (ret[0] != -1 || ret[2] != -1 || ret[4] != -1) {
		t.Error("PreKMP error:", ret)
	}

	fmt.Println("ORI= cocacola")
	fmt.Println("MP=", preMP("cocacola"))
	fmt.Println("KMP=", preKMP("cocacola"))

	fmt.Println("ORI= ABCDABD")
	fmt.Println("MP=", preMP("ABCDABD"))
	fmt.Println("KMP=", preKMP("ABCDABD"))

	fmt.Println("ORI= abcabcacab")
	fmt.Println("MP=", preMP("abcabcacab"))
	fmt.Println("KMP=", preKMP("abcabcacab"))
}

func TestKMP(t *testing.T) {
	if ret := KMP("co", "cococp"); len(ret) != 0 {
		t.Error("Input error detect failed")
	}

	ret := KMP("cocacola", "co")
	if len(ret) == 0 {
		t.Error("No result on KMP")
		return
	}

	if len(ret) != 2 && (ret[0] != 0 || ret[1] != 4) {
		t.Error("Result is wrong on KMP 1st test:", ret)
		return
	}

	if r2 := KMP("ABC ABCDAB ABCDABCDABDE", "ABCDABD"); len(r2) > 0 && r2[0] != 15 {
		t.Error("wrong on 2nd KMP test:", r2)
	}

	if r3 := KMP("ACBDA", "ABCD"); len(r3) != 0 {
		t.Error("wrong on 3rd KMP", r3)
	}
}

func TestStrstr(t *testing.T) {
	if index := Strstr("hellow world", "low"); index != 3 {
		t.Error("wrong on 1st Strstr test:", index)
	}

	if index := Strstr("ABC ABCDAB ABCDABCDABDE", "ABCDABD"); index != 15 {
		t.Error("wrong on 2nd Strstr test:", index)
	}
}

func TestStrchr(t *testing.T) {
	if index := Strchr("hellow world", "w"); index != 7 {
		t.Error("wrong on 1st Strchr test:", index)
	}

	if index := Strchr("ABC ABCDAB ABCDABCDABDE", "CDAB"); index != 17 {
		t.Error("wring on 2nd Strchr test:", index)
	}

}