SW_BVA_WorstCaseTesting.java

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package software_testing_meaures;

import java.util.Scanner;

/**
 *
 * @author Suraj Singh
 */
class SW_BVA_WorstCaseTesting {
static int BoundaryValues[],RobustnessValues[],WorstCase[];
    static int high,low,discriminant,counter;
    public static void setBoundaryValues(int low, int high)
    {
        BoundaryValues = new int[]{low,low+1,high-1,high};// Assuming four boundary values        
        RobustnessValues= new int[]{low-1,low,low+1,(low+high)/2,high-1,high};// Assuming six boundary values    
        WorstCase = new int[]{low,low+1,(low+high)/2,high-1,high};// Assuming five boundary values        
    }
    public static void calculateDiscriminant(int a, int b, int c)
    {
        discriminant = b*b - 4*a*c;
        if(a>high || a<low|| b < low || b > high || c < low || c > high)
            System.out.printf("\n%-8d %3d %3d %-4d %-50s",counter,a,b,c,"Invalid Input... Values Out of Range !!!");
        else if(a==0)
            System.out.printf("\n%-8d %3d %3d %-4d %-30s",counter,a,b,c,"Not a Quadratic Equation");
        else if(discriminant>0)
            System.out.printf("\n%-8d %3d %3d %-4d %-30s",counter,a,b,c,"Real Roots");
        else if(discriminant==0)
            System.out.printf("\n%-8d %3d %3d %-4d %-30s",counter,a,b,c,"Equal Roots");
        else if(discriminant<0)
            System.out.printf("\n%-8d %3d %3d %-4d %-30s",counter,a,b,c,"Imaginary Roots");
        counter++;
    }
    public static void main(String args[])
    {
        Scanner s = new Scanner(System.in);
        int a,b,c,count=0,type,average;
        char choice;
        do
        {            
        System.out.println("\nEnter the type of testing to be performed !!!");
        System.out.println("\n1.\tBoundary Value Analysis.");
        System.out.println("\n2.\tRobustness  Testing");
        System.out.println("\n3.\tWorst Case Testing\n\nEnter your choice !!!");
        type = s.nextInt();
        System.out.print("Enter the range for [a,b,c] => ");
        low = s.nextInt();
        high = s.nextInt();
        average = (low+high)/2;
        counter = 1;
        System.out.println(low+"<= a,b,c <="+high);
        System.out.println();
        System.out.println("\nTestCase   a  b  c    Output");
        // Auto generation of values of a,b anc c
        setBoundaryValues(low,high);
        switch(type)
        {
            case 1 : 
                for(int i=0;i<3;i++)
                {           
                    for(int j=0;j<BoundaryValues.length;j++)
                    {
                        a = BoundaryValues[j];
                        b = average;
                        c = average;
                        if(i==0) // a should be changed
                            calculateDiscriminant(a,b,c);  
                        else if(i==1) // b should be 
                            calculateDiscriminant(b,a,c);
                        else // c should be changed
                            calculateDiscriminant(c,b,a);
                    }          
                }
                calculateDiscriminant(average,average,average);
                break;
            case 2:
                for(int i=0;i<3;i++)
                {           
                    for(int j=0;j<RobustnessValues.length;j++)
                    {
                        a = RobustnessValues[j];
                        b = average;
                        c = average;
                        if(i==0) // a should be changed
                            calculateDiscriminant(a,b,c);  
                        else if(i==1) // b should be changed
                            calculateDiscriminant(b,a,c);
                        else // c should be changed
                            calculateDiscriminant(c,b,a);
                    }          
                }
                calculateDiscriminant(average,average,average);
                break;
            case 3 :  
                for(int j=0;j<WorstCase.length;j++)
                    {
                        a  = WorstCase[j];                
                        for(int k=0;k<WorstCase.length;k++)
                        {
                            b = WorstCase[k];
                            for(int l=0;l<WorstCase.length;l++)
                            {
                                c = WorstCase[l];
                                if(count==0) // a should be changed
                                    calculateDiscriminant(a,b,c);  
                                else if(count==1) // b should be changed
                                    calculateDiscriminant(b,a,c);
                                else // c should be changed
                                    calculateDiscriminant(c,b,a);
                            }                    
                        }
                        count++;
                    }         
                break;
            default : System.out.println("\n Please enter the correct choice ");               
        }        
        System.out.println("\nDo you want to continue ? \nY/y to continue. Other key to stop.");
        choice = s.next().charAt(0);
        System.out.println();
        }while(choice=='Y'||choice=='y');
    }    
}