def test_detect_collision(self):
state = day13.parse_track(LINEAR_CRASH)
for _ in range(2):
result = day13.simulate_tick(state)
state = result['state']
assert result['first_collision'] == (0, 3)
def test_parse_simple_loop(self):
result = day13.parse_track(SIMPLE_LOOP)
assert result['track'] == {
(0, 0): '/',
(5, 0): '\\',
(0, 3): '\\',
(5, 3): '/'
}
def test_parse_simple_intersection(self):
result = day13.parse_track(SIMPLE_INTERSECTION)
assert result['track'] == {
(0, 0): '/',
(6, 0): '\\',
(2, 2): '/',
(5, 2): '+',
(8, 2): '\\',
(0, 4): '\\',
(3, 4): '+',
(6, 4): '/',
(3, 6): '\\',
(9, 6): '/'
}
def test_answer(self):
state = day13.parse_track(PUZZLE_INPUT)
result = day13.simulate_removing_carts(state, max_ticks=100000)
assert result['last_cart_position'] == (124, 103)
def test_removing_carts(self):
state = day13.parse_track(PART_TWO_EXAMPLE)
result = day13.simulate_removing_carts(state)
assert result['last_cart_position'] == (6, 4)
def test_answer(self):
state = day13.parse_track(PUZZLE_INPUT)
result = day13.simulate_until_collision(state)
assert result['first_collision'] == (46, 18)
def test_eventual_collision(self):
state = day13.parse_track(LONGER_EXAMPLE)
result = day13.simulate_until_collision(state)
assert result['first_collision'] == (7, 3)