Added finished Ghost movement unit test

src/test/java/pacmanTests/GhostTest.java

@@ -12,7 +12,17 @@ class GhostTest {
 	
 	@Test
 	void Ghosts_moving_changesPosition() {
-		
+		// arrange
+		GameManager gameManager = new GameManager();
+		Ghost ghost = gameManager.ghosts[0];
+		ghost.position = new Vector2(2,2);
+		Vector2 direction = new Vector2(1,0);
+		Vector2 expectedPosition = new Vector2(3,2);
+		// act
+		ghost.move(direction);
+		Vector2 position = ghost.position;
+		// assert
+		assertThat(position).isEqualTo(expectedPosition);		
 	}
 
 }