@Test
public void testPlaceShip() throws ShipTooCloseException {
Coordinate[] shipCoordinates = new Coordinate[] {new Coordinate(1, 1)};
battlefield.placeShip(shipCoordinates);
assertArrayEquals(new Boolean[] {true}, battlefield.getShipsByCoordinates(shipCoordinates));
}
@Test(expected = ShipTooCloseException.class)
public void testExceptionWhenShipsTooClose() throws ShipTooCloseException {
battlefield.placeShip(new Coordinate[] {new Coordinate(1, 1), new Coordinate(1, 2)});
battlefield.placeShip(new Coordinate[] {new Coordinate(2, 1)});
}