@Test
  public void testRadius1Center3And5() {
    MooreNeighborhood mooreNeighborhood = new MooreNeighborhood(1);

    Set<CellCoordinates> neighborhood = mooreNeighborhood.cellNeighbors(new Cords2D(3, 5));

    Set<CellCoordinates> expected = new HashSet<>();
    expected.add(new Cords2D(2, 4));
    expected.add(new Cords2D(3, 4));
    expected.add(new Cords2D(4, 4));
    expected.add(new Cords2D(2, 5));
    expected.add(new Cords2D(4, 5));
    expected.add(new Cords2D(2, 6));
    expected.add(new Cords2D(3, 6));
    expected.add(new Cords2D(4, 6));

    assertEquals(expected, neighborhood);
  }
  @Test
  public void testRadius1Center0And2Size4by3Wrap() {
    MooreNeighborhood mooreNeighborhood = new MooreNeighborhood(1, true, 4, 3);
    Set<CellCoordinates> neighbors = mooreNeighborhood.cellNeighbors(new Cords2D(0, 2));

    Set<CellCoordinates> expected = new HashSet<>();
    expected.add(new Cords2D(3, 1));
    expected.add(new Cords2D(0, 1));
    expected.add(new Cords2D(1, 1));

    expected.add(new Cords2D(3, 2));
    expected.add(new Cords2D(1, 2));

    expected.add(new Cords2D(3, 0));
    expected.add(new Cords2D(0, 0));
    expected.add(new Cords2D(1, 0));

    assertEquals(expected, neighbors);
  }
  @Test
  public void testRadius2Center0And0() {
    MooreNeighborhood mooreNeighborhood = new MooreNeighborhood(2);

    Set<CellCoordinates> neighborhood = mooreNeighborhood.cellNeighbors(new Cords2D(0, 0));

    Set<CellCoordinates> expected = new HashSet<>();
    expected.add(new Cords2D(-2, -2));
    expected.add(new Cords2D(-1, -2));
    expected.add(new Cords2D(0, -2));
    expected.add(new Cords2D(1, -2));
    expected.add(new Cords2D(2, -2));

    expected.add(new Cords2D(-2, -1));
    expected.add(new Cords2D(-1, -1));
    expected.add(new Cords2D(0, -1));
    expected.add(new Cords2D(1, -1));
    expected.add(new Cords2D(2, -1));

    expected.add(new Cords2D(-2, 0));
    expected.add(new Cords2D(-1, 0));
    expected.add(new Cords2D(1, 0));
    expected.add(new Cords2D(2, 0));

    expected.add(new Cords2D(-2, 1));
    expected.add(new Cords2D(-1, 1));
    expected.add(new Cords2D(0, 1));
    expected.add(new Cords2D(1, 1));
    expected.add(new Cords2D(2, 1));

    expected.add(new Cords2D(-2, 2));
    expected.add(new Cords2D(-1, 2));
    expected.add(new Cords2D(0, 2));
    expected.add(new Cords2D(1, 2));
    expected.add(new Cords2D(2, 2));

    assertEquals(expected, neighborhood);
  }
  @Test(expected = NotSupportedCellCoordinates.class)
  public void testUnknownCellCoordinatesType() {
    MooreNeighborhood mooreNeighborhood = new MooreNeighborhood(1);

    mooreNeighborhood.cellNeighbors(new CellCoordinates() {});
  }