### Question:
Grid implements Entity { public void place(int x, int y, Tileable tileable) { if (!onGrid(x, y)) { throw new IllegalArgumentException("The given coordinates do not exist on this grid"); } Tile tile = tiles[y][x]; tile.tileable = tileable; tileable.setTile(tile); } Grid(GameSession session, int width, int height); int getWidth(); int getHeight(); GameSession getSession(); void place(int x, int y, Tileable tileable); Tile get(int x, int y); boolean onGrid(int x, int y);  }### Answer:
@Test public void placeInvalid() { Grid grid = new Grid(session, 3, 1); assertThatThrownBy(() -> grid.place(-1, -1, null)) .isInstanceOf(IllegalArgumentException.class); }