import org.junit.*;
import java.awt.Color;
import static org.junit.Assert.*;

/** 
 * Programme de test de la classe Cercle.
 */
public class CercleTest {

	public static final double EPSILON = 1e-6;
		// précision pour la comparaison entre réels.

	/** Vérifier si deux points ont mêmes coordonnées.
	  * @param p1 le premier point
	  * @param p2 le deuxième point
	  */
	  static void memesCoordonnees(Point p1, Point p2) {
		assertEquals(p1.getX(), p2.getX(), EPSILON);
		assertEquals(p1.getY(), p2.getY(), EPSILON);
	}

	private Point p_0 = new Point(0, 0);
	private Point p_pp = new Point(3, 4);
	private Point p_pm = new Point(3, -4);
	private Point p_mm = new Point(-3, -4);
	private Point p_mp = new Point(-3, 4);

	private Cercle[] c12a = {new Cercle(p_pp, p_mm),
							 new Cercle(p_pm, p_mp),
							 new Cercle(p_mp, p_pm),
							 new Cercle(p_mm, p_pp)};

	private Cercle[] c12b = {new Cercle(p_pp, p_pm),
							 new Cercle(p_pm, p_mm),
							 new Cercle(p_mm, p_mp),
							 new Cercle(p_mp, p_pp)};

	private Cercle[] c13 = {new Cercle(p_pp, p_mm, Color.RED),
							new Cercle(p_pm, p_mp, Color.GREEN),
							new Cercle(p_mp, p_pm, Color.WHITE),
							new Cercle(p_mm, p_pp, Color.BLACK)};

	private Cercle[] c14 = {Cercle.creerCercle(p_0, p_pp),
							Cercle.creerCercle(p_0, p_pm),
							Cercle.creerCercle(p_0, p_mp),
							Cercle.creerCercle(p_0, p_mm)};

	@Test
	public void testE12a() {
		for (Cercle c : c12a) {
			assertNotNull(c);
			assertEquals(5, c.getRayon(), EPSILON);
			assertEquals(10, c.getDiametre(), EPSILON);
			memesCoordonnees(p_0, c.getCentre());
			assertTrue(c.getCouleur() == Color.BLUE);
		}
	}

	@Test
	public void testE12b() {
		for (Cercle c : c12b) {
			assertNotNull(c);
			assertTrue(c.getCouleur() == Color.BLUE);
		}
		assertEquals(4, c12b[0].getRayon(),    EPSILON);
		assertEquals(8, c12b[0].getDiametre(), EPSILON);
		assertEquals(3, c12b[1].getRayon(),    EPSILON);
		assertEquals(6, c12b[1].getDiametre(), EPSILON);
		assertEquals(4, c12b[2].getRayon(),    EPSILON);
		assertEquals(8, c12b[2].getDiametre(), EPSILON);
		assertEquals(3, c12b[3].getRayon(),    EPSILON);
		assertEquals(6, c12b[3].getDiametre(), EPSILON);

		memesCoordonnees(new Point(3, 0),  c12b[0].getCentre());
		memesCoordonnees(new Point(0, -4), c12b[1].getCentre());
		memesCoordonnees(new Point(-3, 0), c12b[2].getCentre());
		memesCoordonnees(new Point(0, 4),  c12b[3].getCentre());
	}

	@Test
	public void testE13() {
		for (Cercle c : c13) {
			assertNotNull(c);
			assertEquals(5, c.getRayon(), EPSILON);
			assertEquals(10, c.getDiametre(), EPSILON);
			memesCoordonnees(p_0, c.getCentre());
		}
		assertTrue(c13[0].getCouleur() == Color.RED);
		assertTrue(c13[1].getCouleur() == Color.GREEN);
		assertTrue(c13[2].getCouleur() == Color.WHITE);
		assertTrue(c13[3].getCouleur() == Color.BLACK);
	}

	@Test
	public void testE14() {
		for (Cercle c : c14) {
			assertNotNull(c);
			assertEquals(5, c.getRayon(), EPSILON);
			assertEquals(10, c.getDiametre(), EPSILON);
			memesCoordonnees(p_0, c.getCentre());
			assertTrue(c.getCouleur() == Color.BLUE);
		}
	}

}