def test_nine_elements(self):
input_dominoes = [
(1, 2),
(5, 3),
(3, 1),
(1, 2),
(2, 4),
(1, 6),
(2, 3),
(3, 4),
(5, 6),
]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_can_reverse_dominoes(self):
input_dominoes = [(1, 2), (1, 3), (2, 3)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_three_elements(self):
input_dominoes = [(1, 2), (3, 1), (2, 3)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_singleton_that_can_t_be_chained(self):
input_dominoes = [(1, 2)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_singleton_cant_be_chained(self):
input_dominoes = [(1, 2)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_disconnected_double_loop(self):
input_dominoes = [(1, 2), (2, 1), (3, 4), (4, 3)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_need_backtrack(self):
input_dominoes = [(1, 2), (2, 3), (3, 1), (2, 4), (2, 4)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_disconnected_single_isolated(self):
input_dominoes = [(1, 2), (2, 3), (3, 1), (4, 4)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_need_backtrack(self):
input_dominoes = [(1, 2), (2, 3), (3, 1), (2, 4), (2, 4)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_disconnected_simple(self):
input_dominoes = [(1, 1), (2, 2)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_disconnected_double_loop(self):
input_dominoes = [(1, 2), (2, 1), (3, 4), (4, 3)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_cant_be_chained(self):
input_dominoes = [(1, 2), (4, 1), (2, 3)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_can_reverse_dominoes(self):
input_dominoes = [(1, 2), (1, 3), (2, 3)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_three_elements(self):
input_dominoes = [(1, 2), (3, 1), (2, 3)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_can_t_be_chained(self):
input_dominoes = [(1, 2), (4, 1), (2, 3)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_separate_loops(self):
input_dominoes = [(1, 2), (2, 3), (3, 1), (1, 1), (2, 2), (3, 3)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_disconnected_simple(self):
input_dominoes = [(1, 1), (2, 2)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_nine_elements(self):
input_dominoes = [(1, 2), (5, 3), (3, 1), (1, 2), (2, 4), (1, 6),
(2, 3), (3, 4), (5, 6)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_disconnected_single_isolated(self):
input_dominoes = [(1, 2), (2, 3), (3, 1), (4, 4)]
output_chain = can_chain(input_dominoes)
self.refute_correct_chain(input_dominoes, output_chain)
def test_empty_input_empty_output(self):
input_dominoes = []
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_separate_loops(self):
input_dominoes = [(1, 2), (2, 3), (3, 1), (1, 1), (2, 2), (3, 3)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_singleton_input_singleton_output(self):
input_dominoes = [(1, 1)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_empty_input_empty_output(self):
input_dominoes = []
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)
def test_singleton_input_singleton_output(self):
input_dominoes = [(1, 1)]
output_chain = can_chain(input_dominoes)
self.assert_correct_chain(input_dominoes, output_chain)