@Test
public void update_ThereIsAFruit_GrowsSnake() throws Exception {
FruitRule rule = new FruitRule(new Point(0, 0));
Snake snake = rule.update(newSnake(0, 0));
assertEquals(newSnake(0, 0).addTail(-1, 0), snake);
}
@Test
public void update_ThereIsNoFruit_ReturnsSameSnake() throws Exception {
FruitRule rule = new FruitRule(new Point(1, 0));
Snake snake = rule.update(newSnake(0, 0));
assertEquals(newSnake(0, 0), snake);
}
