/*
 * Author: CHEN Yongyuan (Walter) 1930006025 from OOP(1007)
 * Date: 2022-04-14
 * Description: This is the Dot class inherited from Shape class.
 */

public class Dot extends Shape {
	/**
	 * Constructor.
	 *
	 * @param x the x coordinate of the dot
	 * @param y the y coordinate of the dot
	 */
	public Dot(double x, double y) {
		super(x, y);
	}

	/**
	 * Calculates the dot's area.
	 *
	 * @return the area of the dot
	 */
	public double area() {
		return 0;
	}

	/**
	 * Resize method of Dot throw an CannotResizeException with message "Cannot
	 * resize a dot!"
	 *
	 * @param newSize the new size of the dot
	 * @throws CannotResizeException the exception
	 */
	@Override
	public void resize(double newSize) throws CannotResizeException {
		throw new CannotResizeException("Cannot resize a dot!");
	}

	/**
	 * Test.
	 */
	public static void testDot() {
		Dot d = new Dot(1.2, 3.4);
		// getX, getY, and move are inherited from Shape.
		// area and resize come from Dot itself.
		System.out.println(d.getX() == 1.2);
		System.out.println(d.getY() == 3.4);
		System.out.println(d.area() == 0.0);
		// Move the dot. The area does not change.
		d.move(7.8, 9.0);
		System.out.println(d.getX() == 9.0);
		System.out.println(d.getY() == 12.4);
		System.out.println(d.area() == 0.0);
		// Resize the dot. An exception is thrown, caught, and tested.
		try {
			d.resize(12.3);
		} catch (Exception ex) {
			System.out.println(ex.getMessage() == "Cannot resize a dot!");
		}
		// The area and position do not change.
		System.out.println(d.getX() == 9.0);
		System.out.println(d.getY() == 12.4);
		System.out.println(d.area() == 0.0);

		try {
			d.resize(12.3);
		} catch (CannotResizeException ex) {
			System.out.println(ex.getMessage() == "Cannot resize a dot!");
		}

	}
}