import java.io.File;
import java.util.Scanner;

/**
 * The Test class is the main class used to test and grade the CPS420 Lab 6.
 * <br> DO NOT MODIFY THIS CLASS.
 * @author Sophie Quigley
 */
public class Test {

    /** 
    * Input stream.
    */
    private static Scanner input = null;
    
    /** 
    * Path of directory containing test files.
    */
    public static final String testDirPath = "/misc/cps420/public_html/doc/W24/Lab6/Tests/";

    /** 
    * Graph being tested
    */   
    private static Graph graph = null;
          
    /** 
    * Score calculated
    */   
    private static int score = 0;

    
    /**
    * Main test program calculates score for program.
    * <br>It first tests the isConnected method on graphs in test files.
    * <br>Then it tests it on randomly generated undirected simple graphs.
    * @param args the command line arguments
    */

    public static void main(String[] args) {

      // Run test files
			testFile("tree0",true,2);
			testFile("tree1",true,1);
			testFile("tree4",true,1);
			testFile("disconnected2",false,1);
			testFile("disconnected3",false,1);
			testFile("disconnected4",false,1);
			testFile("disconnected5",false,2);
			testFile("disconnected7",false,2);
			testFile("fullgraph2",true,1);
			testFile("fullgraph5",true,1);
			testFile("graph2-1",false,2);
			testFile("graph2-2",true,1);
			testFile("graph5-1",false,2);
			testFile("graph5-2",true,1);
			testFile("graph5-3",false,2);
			testFile("graph5-4",true,1);
			testFile("graph10",true,2);
			testFile("graph10-1",true,2);
			testFile("graph10-3",false,2);
			testFile("graph10-4",true,2);
			testFile("tree10-1",true,2);
			testFile("tree10-2",true,2);
			testFile("tree10-2",true,2);
			testFile("graph15",true,2);
			testFile("graph20",true,2);
    }

    /**
    * Reads graph described in a test file and test whether that graph is connected
    * @param filename name of test file. The directory containing that file is hard coded in testDirPath
    * @param expected true if graph is connected and false otherwise
    * @param points points for correct answer
    */
    public static void testFile(String filename, boolean expected, int points) {
        String filepath = testDirPath + filename;
        boolean connected;

        System.out.print("=====  Test " + filename + " out of " + points );
        try {
            input = new Scanner(new File(filepath));
        } catch (Exception ex) {
            System.out.println(ex);
            System.exit(0);
        }        
        try {
            graph = new Graph(input);
        } catch (InstantiationException ex) {
            System.out.println(ex);
            System.exit(0);
        } catch (Exception ex) {
            System.out.println(ex);
            System.exit(0);
        }
        // Test isConnected on graph
        connected = graph.isConnected();
        if (connected == expected) {
            score += points;
            System.out.println("\t- pass. Score so far=" + score);
         }
        else  {
            System.out.println("\t- fail. Score so far=" + score);
        }
    }


}