def test_segments():
chain = PolygonalChain((0, 1, 4, 8))
segments = list(chain.segments())
assert len(segments) == 3
assert segments[0] == LineSegment((0, 1))
assert segments[1] == LineSegment((1, 4))
assert segments[2] == LineSegment((4, 8))
def test_eq():
assert PolygonalChain((0, 1, 2)) == PolygonalChain((0, 1, 2))
# pylint: disable=unneeded-not
assert not PolygonalChain((0, 1, 2)) == PolygonalChain((0, 1, 4))
assert not PolygonalChain((0, 1, 2)) == PolygonalChain((0, 4, 2))
assert not PolygonalChain((0, 1, 2)) == PolygonalChain((4, 1, 2))
assert not PolygonalChain((0, 1, 2)) == PolygonalChain((1, 2, 3, 4))
def test_adjacent_vertex_indices_2():
chain = PolygonalChain((0, 1, 4, 8))
pairs = list(chain.adjacent_vertex_indices(2))
assert len(pairs) == 3
assert pairs[0] == (0, 1)
assert pairs[1] == (1, 4)
assert pairs[2] == (4, 8)
def test_adjacent_vertex_indices_1():
chain = PolygonalChain((0, 1, 4, 8))
pairs = list(chain.adjacent_vertex_indices(1))
assert len(pairs) == 4
assert pairs[0] == (0, )
assert pairs[1] == (1, )
assert pairs[2] == (4, )
assert pairs[3] == (8, )
def test_connect(vertex_indices_a, vertex_indices_b, expected_vertex_indices):
chain = PolygonalChain(vertex_indices_a)
chain.connect(PolygonalChain(vertex_indices_b))
assert PolygonalChain(expected_vertex_indices) == chain
def test_repr():
assert repr(PolygonalChain([])) == "PolygonalChain(vertex_indices=())"
assert repr(PolygonalChain(
(0, 2, 1))) == "PolygonalChain(vertex_indices=(0, 2, 1))"
assert (repr(PolygonalChain(
(0, 2, 1, 4, 3))) == "PolygonalChain(vertex_indices=(0, 2, 1, 4, 3))")
def test_eq_normalized():
assert PolygonalChain((0, 1, 2)) == PolygonalChain((0, 2, 1))
assert PolygonalChain((1, 0, 2)) == PolygonalChain((0, 2, 1))
assert PolygonalChain((1, 0, 2, 4)) == PolygonalChain((0, 1, 4, 2))
# pylint: disable=unneeded-not
assert not PolygonalChain((1, 0, 2, 4)) == PolygonalChain((0, 1, 2, 4))
def test_normalized(indices_init, indices_normalized):
assert (list(PolygonalChain(indices_init).normalized().vertex_indices) ==
indices_normalized)
def test_reassign_vertex_indices():
chain = PolygonalChain((0, 21, 42, 84))
chain.vertex_indices = (1, 2, 3, 4)
assert tuple(chain.vertex_indices) == (1, 2, 3, 4)
def test_init():
chain = PolygonalChain((0, 21, 42, 84))
assert tuple(chain.vertex_indices) == (0, 21, 42, 84)
def test_connect_fail_empty(vertex_indices_a, vertex_indices_b):
chain = PolygonalChain(vertex_indices_a)
with pytest.raises(Exception):
chain.connect(PolygonalChain(vertex_indices_b))
def test_connect_fail(vertex_indices_a, vertex_indices_b):
chain = PolygonalChain(vertex_indices_a)
with pytest.raises(PolygonalChainsNotOverlapingError):
chain.connect(PolygonalChain(vertex_indices_b))