Compare 3 different input files with 3 different output files

filetest.java

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 */

import org.junit.*;
import static org.junit.Assert.*;
import java.io.*;


/**
 *
 * @author user
 */
public class ShortestPathTest {
    
    InputStream stdin;
    PrintStream stdout;
    PrintStream stderr;
    
    public ShortestPathTest() {
    }
    
    @BeforeClass
    public static void setUpClass() {
    
        
    }
    
    @AfterClass
    public static void tearDownClass() {
    }
    
    @Before
    public void setUp() {
        stdin = System.in;  //temporarily saving these so that I can revert back to these at the end of each file
        stdout = System.out;
    }
    
    @After
    public void tearDown() {
        System.setIn(stdin);
        System.setOut(stdout);
    }

    /**
     * Test of main method, of class ShortestPath.
     */
    @Test
    public void testMain1() throws IOException
    {
        System.out.println("main1");
        
        System.setIn(new FileInputStream("input1.txt"));
                
        File newout = new File("output.txt");
        
        FileOutputStream outnew = new FileOutputStream(newout);
        PrintStream outcontent = new PrintStream(outnew);
        System.setOut(outcontent);
        
        File oldout = new File("output1.txt");
        //FileInputStream outread = new FileInputStream(oldout);
        BufferedReader outread = new BufferedReader(new FileReader(oldout));
        
        String[] args = null;
        ShortestPath.main(args);
        outnew.close();
        BufferedReader newread = new BufferedReader(new FileReader(newout));
        
        String temp1;
        String temp2;
        
        do{            
            temp1 = newread.readLine();
            temp2 = outread.readLine();
            assertEquals(temp1, temp2);
        }while((temp1 != null) && (temp2 != null));
        newread.close();
        // TODO review the generated test code and remove the default call to fail.
        //fail("The test case is a prototype.");
    }

        /**
     * Test of main method, of class ShortestPath.
     */
    @Test
    public void testMain2() throws IOException
    {
        System.out.println("main2");
        
        System.setIn(new FileInputStream("input2.txt"));
                
        File newout = new File("output.txt");
        
        FileOutputStream outnew = new FileOutputStream(newout);
        PrintStream outcontent = new PrintStream(outnew);
        System.setOut(outcontent);
        
        File oldout = new File("output2.txt");
        //FileInputStream outread = new FileInputStream(oldout);
        BufferedReader outread = new BufferedReader(new FileReader(oldout));
        
        String[] args = null;
        ShortestPath.main(args);
        outnew.close();
        BufferedReader newread = new BufferedReader(new FileReader(newout));
        
        String temp1;
        String temp2;
        
        do{            
            temp1 = newread.readLine();
            temp2 = outread.readLine();
            assertEquals(temp1, temp2);
        }while((temp1 != null) && (temp2 != null));
        newread.close();
        // TODO review the generated test code and remove the default call to fail.
        //fail("The test case is a prototype.");
    }
        /**
     * Test of main method, of class ShortestPath.
     */
    @Test
    public void testMain3() throws IOException
    {
        System.out.println("main3");
        
        System.setIn(new FileInputStream("input3.txt"));
                
        File newout = new File("output.txt");
        
        FileOutputStream outnew = new FileOutputStream(newout);
        PrintStream outcontent = new PrintStream(outnew);
        System.setOut(outcontent);
        
        File oldout = new File("output3.txt");
        //FileInputStream outread = new FileInputStream(oldout);
        BufferedReader outread = new BufferedReader(new FileReader(oldout));
        
        String[] args = null;
        ShortestPath.main(args);
        outnew.close();
        BufferedReader newread = new BufferedReader(new FileReader(newout));
        
        String temp1;
        String temp2;
        
        do{            
            temp1 = newread.readLine();
            temp2 = outread.readLine();
            assertEquals(temp1, temp2);
        }while((temp1 != null) && (temp2 != null));
        newread.close();
        // TODO review the generated test code and remove the default call to fail.
        //fail("The test case is a prototype.");
    }
    
}