plz write the junit code for all 3 questions and the code is given below for reference --

1) Rename testDoSomething to testDoSomething1. Write unit test that creates a Stringy object initialized with a string that contains an 'r', and then calls doSomething, passing a non-empty string that contains at least one 'r' in the first parameter, and the character 'r' in the second parameter. Add code that tests the string returned from doSomething, as well as the String returned by stringy.getMyString();

2) Write one more test, called testSomething2, which creates a Stringt object with the same string as in testDoSomething1, and then calls doSomething with an empty string passed in as the first parameter. Again, add code that tests the returned value and the contents of the instance variable.

3) Write third test, called testSomething3, which creates a Stringy object initialized with an empty string, and a call to doSomething with a non-empty string and the character 'r'. As before, test the values returned by doSomething and by getMyString.

raw code --

Stringy.java ------

/**

* Maintains a string and provides routine for

* manipulating that string

* @author BKM

*

*/

public class Stringy {

private String myString;

public Stringy(String str){

myString = str;

}

/**

* returns the string maintained by the Stringy class

*/

public String getMyString() {

return myString;

}

/**

* Concatenates the string parameter to the front of

* the string stored in Stringy. It returns a new string

* in which all occurrences of the character

* passed in the parameter ch are replaced with the letter 'X'

*/

public String doSomething(String anotherStr, char ch) {

myString = anotherStr + myString;

String newString = myString.replace(ch, 'X');

return newString;

}

}