We are interested in testing the performance of the static class EMath with the following public interface;

+ gcd(String x, String y): int, NumberFormatException

+ absolute(String x): int, NumberFormatException

+ module(String x, String y ): int, ArithmeticException, NumberFormatException

Where the member methods of the class;

gcd(x, y) returns the greatest common divisor of the integer numbers x and y, or exception.

absolute(x) returns the absolute value of x, or exception.

modulo(x, y) returns x modulus y, or exception.

Develop a bank of test using the tools NetBeans and JUnit for testing the right performance of Java objects of the class EMath.

Concepts in practice: Unit Testing with NetBeans and JUnit.

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Files to be used: EMath.java

Files to deliver: EMathTestingProject.zip //------------------------------------EMath.java-----------------------------------------------------------

/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package emath; /** * Homework 02.2: Unit Testing with NetBeans and JUnit * @author */ public class EMath { public static int absolute(String s1){ int number=Integer.parseInt(s1); return((number>0)? number: -number); } public static int modulo(String sa, String sb){ int a=absolute(sa); int b=absolute(sb); return(a-(a/b)*b); } public static int gcd(String sa, String sb){ int numA=absolute(sa); int numB=absolute(sb); while (numA != numB) { if (numB > numA) numB -=numA; else numA -=numB; } return (numA); } }