def test_too_many_neighbours_triggers_bad_edge_exception(caplog):
with pytest.raises(InvalidEdgeError) as e:
graph_from_ascii("""
1---------------3
|
2""")
assert str(e.value) == """Too many nodes:
def test_bad_label_triggers_exception(caplog):
with pytest.raises(InvalidEdgeError) as e:
graph_from_ascii("""
n1
|
n2--(label)
|
n3""")
assert str(e.value) == """Too many nodes:
def test_converts_other_kind_of_escaped_down_obtuse_angle():
graph = graph_from_ascii("""
1-------\\
\\
2 """)
assert set(graph.nodes()) == {"1", "2"}
assert set(graph.edges()) == {("1", "2")}
def test_converts_the_other_kind_of_up_right_angle():
graph = graph_from_ascii("""
1
|
2------- """)
assert set(graph.nodes()) == {"1", "2"}
assert set(graph.edges()) == {("1", "2")}
def test_converts_down_right_angle():
graph = graph_from_ascii("""
1--------
|
2 """)
assert set(graph.nodes()) == {"1", "2"}
assert set(graph.edges()) == {("1", "2")}
def test_line_labels():
graph = graph_from_ascii("""
A---(nuts)----B----(string)---C
|
|
|
D---(string)----E
""")
assert set(graph.nodes()) == {"A", "B", "C", "D", "E"}
assert set(graph.edges()) == {("A", "B"), ("B", "C"), ("B", "D"),
("D", "E")}
assert graph.get_edge_data("A", "B")["label"] == "nuts"
assert graph.get_edge_data("A", "B")["length"] == 13
assert graph.get_edge_data("B", "C")["label"] == "string"
assert graph.get_edge_data("B", "C")["length"] == 15
with pytest.raises(KeyError):
assert graph.get_edge_data("B", "D")["label"] == ""
assert graph.get_edge_data("B", "D")["length"] == 3
assert graph.get_edge_data("D", "E")["label"] == "string"
assert graph.get_edge_data("D", "E")["length"] == 15
def test_converts_other_kind_of_down_left_angle():
graph = graph_from_ascii("""
1
|
---2 """)
assert set(graph.nodes()) == {"1", "2"}
assert set(graph.edges()) == {("1", "2")}
def test_S_bend():
graph = graph_from_ascii("""
0-----
|
|---2
""")
assert set(graph.nodes()) == {"0", "2"}
assert set(graph.edges()) == {("0", "2")}
def test_converts_meshed_network():
graph = graph_from_ascii("""
0----1-------2
\ /
3---4 """)
assert set(graph.nodes()) == {"0", "1", "2", "3", "4"}
assert set(graph.edges()) == {("0", "1"), ("1", "2"), ("1", "3"),
("2", "4"), ("3", "4")}
def test_node_ordering():
graph = graph_from_ascii("""
0----3-------2
\ /
1---4
""")
assert set(graph.nodes()) == {"0", "1", "2", "3", "4"}
assert set(graph.edges()) == {("0", "3"), ("3", "2"), ("3", "1"),
("2", "4"), ("1", "4")}
def test_ascii_positions():
graph = graph_from_ascii("""
Node_1---Node2-----
/
Nald33
""")
assert graph.node["Node_1"]["position"] == Point(x=16, y=1)
assert graph.node["Node2"]["position"] == Point(x=25, y=1)
assert graph.node["Nald33"]["position"] == Point(x=31, y=3)
def test_converts_left_down_angle():
graph = graph_from_ascii("""
------2
|
1
""")
assert set(graph.nodes()) == {"2", "1"}
assert set(graph.edges()) == {("2", "1")}
def test_u_bend():
graph = graph_from_ascii("""
------|
| |
1 |
2------|
""")
assert set(graph.nodes()) == {"1", "2"}
assert set(graph.edges()) == {("1", "2")}
def test_node_positions():
graph = graph_from_ascii(
"""
Node_1---Node2-----
/
Nald33
""")
assert networkx.get_node_attributes(graph, "position")["Node_1"] == (16, 1)
assert networkx.get_node_attributes(graph, "position")["Node2"] == (25, 1)
assert networkx.get_node_attributes(graph, "position")["Nald33"] == (31, 3)
def test_doubl_down_left_angle():
graph = graph_from_ascii("""
------2
|
|
--
1---|
""")
assert set(graph.nodes()) == {"2", "1"}
assert set(graph.edges()) == {("2", "1")}
def test_adjacent_edges():
graph = graph_from_ascii("""
a------b
c----------d
""")
assert set(graph.nodes()) == {"a", "b", "c", "d"}
assert set(graph.edges()) == {
("a", "b"),
("c", "d"),
}
def test_node_position_attributes():
graph = graph_from_ascii("""
n0-------------n1----------n2
|
|
|
n4
""")
node_positions = networkx.get_node_attributes(graph, "position")
assert node_positions == {
"n0": (8, 2), "n1": (23, 2), "n2": (35, 2),
"n4": (23, 6),
}
def test_line_lengths():
edge_data = graph_from_ascii("""
<13> <10>
n0-------------n1----------n2
|
| <3>
|
n4
""").edges(data=True)
assert list(edge_data) == [
("n0", "n1", OrderedDict([("length", 13)])),
("n1", "n2", OrderedDict([("length", 10)])),
("n1", "n4", OrderedDict([("length", 3)])),
]
def test_vertical_line_adjacent_labels():
graph = graph_from_ascii("""
C
A---D |
(Vertical)
|
B
""")
assert set(graph.nodes()) == {"A", "B", "C", "D"}
assert set(graph.edges()) == {("A", "D"), ("C", "B")}
assert graph.get_edge_data("C", "B")["label"] == "Vertical"
assert graph.get_edge_data("C", "B")["length"] == 3
def test_vertical_line_labels(label):
graph = graph_from_ascii("""
A
|
({label})
|
B
""".format(label=label))
assert set(graph.nodes()) == {"A", "B"}
assert set(graph.edges()) == {("A", "B")}
assert graph.get_edge_data("A", "B")["label"] == label
assert graph.get_edge_data("A", "B")["length"] == 3
def test_line_lengths():
graph = graph_from_ascii("""
<13> <10>
n0-------------n1----------n2
|
| <3>
|
n4
""")
lengths = networkx.get_edge_attributes(graph, "length")
assert lengths == {
("n0", "n1"): 13, ("n1", "n2"): 10,
("n1", "n4"): 3,
}
def test_line_positions_with_horizontal_label():
graph = graph_from_ascii(" n1---(label)--n2 ")
points = networkx.get_edge_attributes(graph, 'points')
assert points == {
("n1", "n2"): [
# positions of the first three dashes right of `n1`
(4, 0), (5, 0), (6, 0),
# positions of the characters in `(label)`
(7, 0), (8, 0), (9, 0), (10, 0), (11, 0), (12, 0), (13, 0),
# positions of the last 2 dashes left of `n2`
(14, 0), (15, 0)
]
}
def test_some_more_node_names():
graph = graph_from_ascii("""
s---p----1---nx
/ | |
/ | 0---f
6l-a c--
/ | \--k
/ ua | 9e
q \ | /
\-r7z jud
\ |
m y
\ |
v-ow
""")
assert len(graph.nodes()) == 19
assert len(graph.edges()) == 19
def test_line_positions_with_vertical_label():
graph = graph_from_ascii("""
n1
|
(label)
|
n2
""")
assert networkx.get_edge_attributes(graph, 'points') == {
("n1", "n2"): [
(12, 3), # position of the '|' under `n1`
(12, 4), # position of the 'b' in `label`
(12, 5), # position of the '|' above `n2`
]
}
def test_line_positions():
graph = graph_from_ascii("""
n1------
|
|
|
n2 """)
points = networkx.get_edge_attributes(graph, 'points')
assert points == {
("n1", "n2"): [
(10, 2), (11, 2), (12, 2), (13, 2), (14, 2), (15, 2),
(15, 3),
(15, 4),
(15, 5),
]
}
def test_line_positions_when_line_is_split():
graph = graph_from_ascii("""
-------n1
|
|
|
n2 """)
points = networkx.get_edge_attributes(graph, 'points')
assert points == {
("n1", "n2"): [
(21, 2), (20, 2), (19, 2), (18, 2), (17, 2), (16, 2), (15, 2),
(15, 3),
(15, 4),
(15, 5),
]
}
def test_line_positions_when_order_is_reversed():
graph = graph_from_ascii("""
-----
| |
n2 n1""")
points = networkx.get_edge_attributes(graph, 'points')
assert points == {
("n2", "n1"): [
(15, 3),
(15, 2),
(16, 2),
(17, 2),
(18, 2),
(19, 2),
(19, 3),
]
}
def test_converts_linear_network():
graph = graph_from_ascii(" A---B----C----D")
assert set(graph.nodes()) == {"A", "B", "C", "D"}
assert set(graph.edges()) == {("A", "B"), ("B", "C"), ("C", "D")}
def test_missing_end_node_raises_missing_end_node_exception():
with pytest.raises(TooFewNodesOnEdge):
graph_from_ascii('1---')
def test_too_many_neighbours_triggers_bad_edge_exception():
with pytest.raises(TooManyNodesOnEdge):
graph_from_ascii("""
1---------------3
|
2 """)
