package com.apple;

import org.testng.Assert;

import org.testng.annotations.Test;

public class StringProblem {

//Main function to run removeCharWithIteration() and removeCharWithStrMethod() methods

/*public static void main(String args[]){

System.out.println(removeCharWithIteration());

System.out.println(removeCharWithStrMethod());

}*/

//TestNG test cases

//For valid string and valid character present in the string (Iteration Method)

@Test

public void testRemoveCharWithStrMethod(){

String givenString="Mississippi";

char charToReplace='i';

String stringToReplace=String.valueOf(charToReplace);

String modifiedString=removeCharWithStrMethod(givenString,charToReplace);

Assert.assertFalse(modifiedString.contains(stringToReplace));

}

//For valid string and valid character not present in the string (Iteration Method)

@Test

public void testRemoveCharWithStrMethodNegative(){

String givenString="Mississippi";

char charToReplace='z';

String stringToReplace=String.valueOf(charToReplace);

String modifiedString=removeCharWithStrMethod(givenString,charToReplace);

Assert.assertFalse(modifiedString.contains(stringToReplace));

}

////For valid string and valid character present in the string (String Method)

@Test

public void testRemoveCharWithIteration(){

String givenString="Mississippi";

char charToReplace='i';

String stringToReplace=String.valueOf(charToReplace);

String temp=removeCharWithIteration(givenString, charToReplace);

Assert.assertFalse(temp.toString().contains(stringToReplace));

}

//For valid string and valid character not present in the string (String Method)

@Test

public void testRemoveCharWithIterationNegative(){

String givenString="Mississippi";

char charToReplace='z';

String stringToReplace=String.valueOf(charToReplace);

String temp=removeCharWithIteration(givenString, charToReplace);

Assert.assertFalse(temp.toString().contains(stringToReplace));

}

//Method to remove character from String iteratively (one by one)

public static String removeCharWithIteration(String givenString, char charToReplace){

//String givenString="Mississippi";

//char charToReplace='i';

StringBuilder modifiedString=new StringBuilder();

for(int i=0;i<givenString.length();i++){

char temp=givenString.charAt(i);

if(temp!=charToReplace){

modifiedString.append(temp);

}

}

return modifiedString.toString();

}

//Method to remove character from String using String method(in a line)

public static String removeCharWithStrMethod(String givenString, char charToReplace){

//String givenString="Mississippi";

//char charToReplace='i';

String modifiedString=givenString.replaceAll(Character.toString(charToReplace), "");

return modifiedString;

}

}