Question $2)$ Details

You are given CollectionOfFunctions.java You must write JUnit tests for all of the methods in the class. At least $5$ different tests for each method. Once you write one of the tests for a specific method, the other $4$ can be easily produced by copying$/$pasting the first one and adjusting the input$/$output parameters. it is important to test boundary inputs as most of the bugs are usually

found in those edge cases. If your tests cases are failing, because there is a bug in the given code, then it is okay. You are not required to fix the code; you just need to write the test cases for this assignment.

public class CollectionOfFunctions $\{$

$/*$

Grade Assigner

Takes in an integer as in input and returns a a letter grade as a character.

$*/$

public char gradeAssigner$($int grade$)\{$

if$($grade $<60)$

return $\text{'}$F$\text{'}$;

if$($grade $<70)$

return $\text{'}$D$\text{'}$;

if$($grade $<80)$

return $\text{'}$C$\text{'}$;

if$($grade $<90)$

return $\text{'}$B$\text{'}$;

return $\text{'}$A$\text{'}$;

$\}$

$/*$

Sorting Algorithm

Takes in a refrence to an interger array as input and sorts the array.

$*/$

public void sortArray$($int$[]$ nums$)\{$

for $($int i $=1$; i $<$ nums.length; i$++)\{$

for $($int j $=$ i; j $>0$ && nums$[$j $-1]>$ nums$[$j$]$; j$--)\{$

int temp $=$ nums$[$j $-1]$;

nums$[$j $-1]=$ nums$[$j$]$;

nums$[$j$]=$ temp;

$\}$

$\}$

$\}$

$/*$

Row Summation

Takes in a reference to a multidimensional array and integer x$.$

Returns the summation of the row at position x in the $2-$d array.

$*/$

public int rowSum$($int$[][]$ nums, int x$)\{$

int sum $=0$;

for$($int j$=0$; j nums$[$i$])\{$

min $=$ nums$[$i$]$;

index $=$ i;

$\}$

$\}$

return new int$[]\{$min$,$ index$\}$;

$\}$

$/*$

String Cleaner

Takes in as in input a String str and a char x$.$

Returns a new string that removed all of the characters x from str$.$

$*/$

public String stringCleaner$($String str$,$ char x$)\{$

String newStr $=""$;

for$($int i$=0$; i