How to use

DatabaseImpl

in

ro.ovidiuconeac.datalayer.database

public static DatabaseImpl getInstance() {
  if (DatabaseImpl.INSTANCE == null) {
    DatabaseImpl.INSTANCE = new DatabaseImpl();
  }
  return DatabaseImpl.INSTANCE;
}

private DatabaseImpl() {
  initFruits();
  initCheeses();
  initSweets();
}

@Test(expected = IndexOutOfBoundsException.class)
public void whenWrongIdForCheeseThrowExpectedException() {
  database.getCheeseById(-1);
}

  @Test(expected = IndexOutOfBoundsException.class)
  public void whenWrongIdForSweetThrowExpectedException() {
    database.getSweetById(123);
  }
}

@Test(expected = IndexOutOfBoundsException.class)
public void whenWrongIdForFruitThrowExpectedException() {
  database.getFruitById(16);
}

@Before
public void setUp() {
  database = DatabaseImpl.getInstance();
}

@Test
public void whenCorrectIdGetCheeseFromDatabase() {
  assertNotNull(database.getCheeseById(id));
}

@Test
public void whenCorrectIdGetSweetFromDatabase() {
  assertNotNull(database.getSweetById(id));
}

@Test
public void whenCorrectIdGetFruitFromDatabase() {
  assertNotNull(database.getFruitById(id));
}