/**
 * This class does some simple tessting of the Point and Line classes.
 */
public class GeometryTester {

   /**
    * The method is in charge of testing the Point class.
    *
    * @return true if not mistakes were found, false otherwise.
    */
   public boolean testPoint() {
      boolean mistake = false;
      Point p1 = new Point(12, 2);
      Point p2 = new Point(9, -2);

      if (p1.getX() != 12) {
         System.out.println("Test p1.getX() failed.");
         mistake = true;
      }
      if (p1.getY() != 2) {
         System.out.println("Test p1.getY() failed.");
         mistake = true;
      }
      if (p1.distance(p1) != 0) {
         System.out.println("Test distance to self failed.");
         mistake = true;
      }
      if (p1.distance(p2) != p2.distance(p1)) {
         System.out.println("Test distance symmetry failed.");
         mistake = true;
      }
      if (p1.distance(p2) != 5) {
         System.out.println("Test distance failed.");
         mistake = true;
      }
      if (!p1.equals(p1)) {
         System.out.println("Equality to self failed.");
         mistake = true;
      }
      if (!p1.equals(new Point(12, 2))) {
         System.out.println("Equality failed.");
         mistake = true;
      }
      if (p1.equals(p2)) {
         System.out.println("Equality failed -- should not be equal.");
         mistake = true;
      }

      return !mistake;
   }

   /**
    * The method is in charge of testing the Line class.
    *
    * @return true if not mistakes were found, false otherwise.
    */
   public boolean testLine() {
      boolean mistakes = false;
      Line l1 = new Line(12, 2, 9, -2);
      Line l2 = new Line(0, 0, 20, 0);
      Line l3 = new Line(9, 2, 12, -2);

      if (!l1.isIntersecting(l2)) {
         System.out.println("Test isIntersecting failed (1).");
         mistakes = true;
      }
      if (l1.isIntersecting(new Line(0, 0, 1, 1))) {
         System.out.println("Test isIntersecting failed (2).");
         mistakes = true;
      }
      Point intersectL1L2 = l1.intersectionWith(l2);
      if (!l1.middle().equals(intersectL1L2)) {
         System.out.println("Test intersectionWith middle failed.");
         mistakes = true;
      }

      return !mistakes;
   }

   /**
    * Main method, running tests on both the point and the line classes.
    * @param args ignored.
    */
   public static void main(String[] args) {
      GeometryTester tester = new GeometryTester();
      tester.testPoint();
      tester.testLine();
   }
}