def test_adjacent_vertex_indices_5():
chain = PolygonalCircuit((0, 1, 4, 8))
quintuples = list(chain.adjacent_vertex_indices(5))
assert len(quintuples) == 4
assert quintuples[0] == (0, 1, 4, 8, 0)
assert quintuples[1] == (1, 4, 8, 0, 1)
assert quintuples[2] == (4, 8, 0, 1, 4)
assert quintuples[3] == (8, 0, 1, 4, 8)
def test_adjacent_vertex_indices_2():
chain = PolygonalCircuit((0, 1, 4, 8))
pairs = list(chain.adjacent_vertex_indices(2))
assert len(pairs) == 4
assert pairs[0] == (0, 1)
assert pairs[1] == (1, 4)
assert pairs[2] == (4, 8)
assert pairs[3] == (8, 0)
def test_adjacent_vertex_indices_3():
chain = PolygonalCircuit((0, 1, 4, 8))
triplets = list(chain.adjacent_vertex_indices(3))
assert len(triplets) == 4
assert triplets[0] == (0, 1, 4)
assert triplets[1] == (1, 4, 8)
assert triplets[2] == (4, 8, 0)
assert triplets[3] == (8, 0, 1)
def test_adjacent_vertex_indices_1():
chain = PolygonalCircuit((0, 1, 4, 8))
singles = list(chain.adjacent_vertex_indices(1))
assert len(singles) == 4
assert singles[0] == (0, )
assert singles[1] == (1, )
assert singles[2] == (4, )
assert singles[3] == (8, )