Question

write the program in java.

Demonstrate that you understand how to use create a class and test it using JUnit

Let’s create a new Project HoursWorked

Under your src folder, create package edu.cincinnatistate.pay

Now, create a new class HoursWorked in package edu.cincinnatistate.pay

This class needs to do the following:

Have a constructor that receives intHours which will be stored in totalHrs

Have a method addHours to add hours to totalHrs

Have a method subHours to subtract hours from totalHrs

Have a method that returns the totalHrs

This class must have JavaDoc comments above the class name and above every method.

Once you create the HoursWorked class, a Junit Test HoursWorkedTest.

This should use @BeforeEach to setup the default HoursWorked to 8 hours.

Create @Test testAddHours to test adding hours

Create @test testSubHours to test subtracting hours

Be sure to generate an error in your test and provide comments on why this is an error

Answer 1

Java Code:

package edu.cincinnatistate.pay;

/**
* Class to store the number of hours worked
* Contains method to add and subtract hours
* Has a constructor to populate initial value
*/
public class HoursWorked {
   private int totalHrs;
  
   /**
* Constructor to initialize total hours
* @return none
* @param int hours
*/
   public HoursWorked(int hours) {
       totalHrs = hours;
   }
  
   /**
* Adds the hours
* @return void
* @param int hours
*/
   public void addHours (int hours) {
       totalHrs += hours;
   }
  
   /**
* Subtract the hours
* @return void
* @param int hours
*/
   public void subHours (int hours) {
       totalHrs -= hours;
   }
  
   /**
* Returns the total hours
* @return int total hours
*/
   public int returnTotalHours() {
       return totalHrs;
   }
}

JUnit Code:

package edu.cincinnatistate.pay;

import static org.junit.jupiter.api.Assertions.*;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

class HoursWorkedTest {
  
   int defaultHoursWorked; //to store default hours worked
   @BeforeEach
   void setupMethod() {
       defaultHoursWorked = 8;
   }
   //positive test case for add hours
   @Test
   void testAddHours() {
       HoursWorked hwObj = new HoursWorked(defaultHoursWorked);
       hwObj.addHours(5);
       assertEquals(hwObj.returnTotalHours(), 13, "Hours are not equal");
   }
  
   //positive test case for subtract hours
   @Test
   void testSubHours() {
       HoursWorked hwObj = new HoursWorked(defaultHoursWorked);
       hwObj.subHours(5);
       assertEquals(hwObj.returnTotalHours(), 3, "Hours are not equal");
   }
  
   //negative test case for subtract hours
   @Test
   void testSubHoursError() {
       HoursWorked hwObj = new HoursWorked(defaultHoursWorked);
       hwObj.subHours(5);
       //8-5 will result in 3 but we are checking for 8 so this will throw an error
       assertEquals(hwObj.returnTotalHours(), 8, "Error case");
   }

}

Sample Output: