H02GameProjekt/src/playground/SpaceInvadersLevelTest.java

package playground;

import static org.junit.Assert.assertTrue;
import java.awt.Color;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import gameobjects.EgoObject;
import gameobjects.GameObject;
import gameobjects.RectObject;

/**
 * Tests {@link SpaceInvadersLevel} for
 * <ol>
 * <li>calcEnemySpeedX() returns the same value as constant SpaceInvadersLevel.ENEMYSPEEDX
 * <li>calcEnemySpeedY() returns the same value as constant SpaceInvadersLevel.ENEMYSPEEDY
 * <li>calcNrEnemies() returns the same value as constant SpaceInvadersLevel.NR_ENEMIES
 * <li>actionIfEnemyIsHit() adds 200 points to score
 * <li>actionIfEgoObjectIsHit() reduces number of lives (egoLives)
 * </ol>
 * 
 * @author jkonert
 *
 */
class SpaceInvadersLevelTest {

  private static SpaceInvadersLevel myLevel;

  @BeforeAll
  static void setUpBeforeClass() throws Exception {
	myLevel = new SpaceInvadersLevel();
	SpaceInvadersLevel.setGlobalFlag("egoLives", 5);
	SpaceInvadersLevel.setGlobalFlag("points", 500);
	SpaceInvadersLevel.setGlobalFlag("highscore", 5000);
  }

  @AfterAll
  static void tearDownAfterClass() throws Exception {
	// nothing
  }

  @Test
  void testCalcEnemySpeedX() {
	assertTrue("EnemySpeedX is as in SpaceInvadersLevel defined",
		myLevel.calcEnemySpeedX() == SpaceInvadersLevel.ENEMYSPEEDX);
  }

  @Test
  void testCalcEnemySpeedY() {
	assertTrue("EnemySpeedY is as in SpaceInvadersLevel defined",
		myLevel.calcEnemySpeedY() == SpaceInvadersLevel.ENEMYSPEEDY);
  }

  @Test
  void testCalcNrEnemies() {
	assertTrue("NrOfEnemies is as in SpaceInvadersLevel defined",
		myLevel.calcNrEnemies() == SpaceInvadersLevel.NR_ENEMIES);
  }

  @Test
  void testActionIfEnemyIsHitPointsUp() {
	Integer numPointsBefore = (Integer) myLevel.getGlobalFlag("points");
	GameObject dummyShot = new RectObject("shot1", myLevel, 0, 0, 0, 0, 12, 12, Color.WHITE);
	GameObject dummyEnemy = new RectObject("ego1", myLevel, 0, 0, 0, 0, 12, 12, Color.BLACK);
	myLevel.addObject(dummyShot);
	myLevel.addObject(dummyEnemy);
	myLevel.actionIfEnemyIsHit(dummyEnemy, dummyShot);
	; // this is the call under test
	Integer numPointsAfter = (Integer) myLevel.getGlobalFlag("points"); // changed?
	assertTrue("numPoints is up +200 after EnemyIsHit", numPointsAfter == numPointsBefore + 200); // points are set +200
																								  // , check.
  }

  @Test
  void testActionIfEgoObjectIsHitLivesDown() {
	Integer numLivesBefore = (Integer) myLevel.getGlobalFlag("egoLives");
	GameObject dummyShot = new RectObject("shot1", myLevel, 0, 0, 0, 0, 12, 12, Color.RED);
	GameObject dummyEgo = new EgoObject("ego1", myLevel, 0, 0, 0, 0, 5);
	myLevel.addObject(dummyShot);
	myLevel.actionIfEgoObjectIsHit(dummyShot, dummyEgo); // this is the call under test
	Integer numLivesAfter = (Integer) myLevel.getGlobalFlag("egoLives"); // changed?
	assertTrue("numLives is reduced by one ifEgoIsHit", numLivesAfter == numLivesBefore - 1); // lives is reduced by one

  }

}