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test_start.py
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261 lines (181 loc) · 4.66 KB
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import start
import pytest
@pytest.fixture()
def triangle_graph():
g = start.Graph()
v1 = g.add_vertex(0, 0)
v2 = g.add_vertex(1, 0)
v3 = g.add_vertex(0, 1)
g.add_edge(v1, v2)
g.add_edge(v1, v3)
g.add_edge(v2, v3)
return g
def test_print_empty():
start.Graph()
def test_set_root(triangle_graph):
g = triangle_graph
i = g.set_root()
assert i == 0
def test_add_three_vertices(triangle_graph):
g = triangle_graph
assert g.len_nodes == 3
assert g.len_edges == 3
def test_show(triangle_graph, capsys):
g = triangle_graph
g.show()
out, err = capsys.readouterr()
assert err == ""
assert out == """Vertices:
0 (x=0, y=0):
(0, 0 -- 1)
(1, 0 -- 2)
1 (x=1, y=0):
(0, 0 -- 1)
(2, 1 -- 2)
2 (x=0, y=1):
(1, 0 -- 2)
(2, 1 -- 2)
Edges:
(0, 0 -- 1) pnt=-1 cyc=-1
(1, 0 -- 2) pnt=-1 cyc=-1
(2, 1 -- 2) pnt=-1 cyc=-1
[]
"""
def test_getters(triangle_graph):
g = triangle_graph
n = g.get_node(0)
assert n["index"] == 0
assert n["y"] == 0
assert len(n["edge_list"]) == 2
e = g.get_edge(n["edge_list"][0])
assert {e["node_plus"], e["node_minus"]} == {0, 1}
def test_pair_edge(triangle_graph):
g = triangle_graph
n = g.get_node(0)
e = g.get_edge(n["edge_list"][0])
g.pair_edge(e['index'])
n = g.get_node(e['node_minus'])
assert n['pair'] == e['index']
n = g.get_node(e['node_plus'])
assert n['pair'] == e['index']
def test_simple_empty_graph_is_consistent(triangle_graph):
triangle_graph.check_all()
def test_check_integrity_ladder():
# make a ladder graph
g = start.Graph()
for i in range(20):
g.add_vertex(0, 0)
for i in range(10):
for j in range(10):
id = g.add_edge(i, j + 10)
if i == j and i != 0:
g.pair_edge(id, True)
g.raw_set_root(0)
g.check_all()
def test_bv_example_shrink():
bv = start.Graph()
bv.add_vertex(0, 5)
bv.add_vertex(-1, 4)
bv.add_vertex(1, 4)
bv.add_vertex(-1, 3)
bv.add_vertex(1, 3)
bv.add_vertex(-2, 2)
bv.add_vertex(0, 2)
bv.add_vertex(-2, 1)
bv.add_vertex(0, 1)
bv.add_vertex(-2, 3)
bv.add_vertex(-2.5, 4)
bv.add_vertex(-2.5, 5)
bv.add_vertex(0, 6)
m = {}
for u, v in {(0, 1), (0, 2), (1, 3), (2, 4), (3, 5), (3, 6),
(5, 7), (6, 8), (3, 9), (9, 10), (10, 11), (3, 4), (0, 12)}:
idx = bv.add_edge(u, v)
m[u, v] = idx
for (u, v) in {(1, 3), (2, 4), (5, 7), (6, 8), (10, 11)}:
bv.pair_edge(m[u, v])
bv.raw_set_root(0)
bv.grow(m[0, 1])
bv.grow(m[3, 5])
bv.grow(m[0, 2])
bv.shrink(m[3, 4])
bv.check_all()
def test_bv_example_shrink2():
bv = start.Graph()
bv.add_vertex(0, 5)
bv.add_vertex(-1, 4)
bv.add_vertex(1, 4)
bv.add_vertex(-1, 3)
bv.add_vertex(1, 3)
bv.add_vertex(-2, 2)
bv.add_vertex(0, 2)
bv.add_vertex(-2, 1)
bv.add_vertex(0, 1)
bv.add_vertex(-2, 3)
bv.add_vertex(-2.5, 4)
bv.add_vertex(-2.5, 5)
bv.add_vertex(0, 6)
bv.add_vertex(0.5, 6)
m = {}
for u, v in {(0, 1), (0, 2), (1, 3), (2, 4), (3, 5), (4, 6), (5, 7),
(6, 8), (3, 9), (9, 10), (10, 11), (3, 4), (0, 12), (12, 13)}:
idx = bv.add_edge(u, v)
m[u, v] = idx
bv.set_root()
bv.augment(bv.get_outer_edges()[0])
bv.set_root()
bv.grow(6)
bv.augment(12)
bv.set_root()
bv.grow(11)
bv.grow(6)
bv.shrink(1)
bv.augment(4)
bv.raw_set_root(5)
bv.grow(13)
bv.expand(14)
bv.augment(3)
bv.set_root()
bv.grow(bv.get_outer_edges()[0])
bv.augment(10)
bv.check_all()
def test_bv_example_expand():
bv = start.Graph()
bv.add_vertex(0, 5)
bv.add_vertex(-1, 4)
bv.add_vertex(1, 4)
bv.add_vertex(-1, 3)
bv.add_vertex(1, 3)
bv.add_vertex(-2, 2)
bv.add_vertex(0, 2)
bv.add_vertex(-2, 1)
bv.add_vertex(0, 1)
bv.add_vertex(-2, 3)
bv.add_vertex(-2.5, 4)
bv.add_vertex(-2.5, 5)
bv.add_vertex(0, 6)
bv.add_vertex(0.5, 6)
m = {}
for u, v in {(0, 1), (0, 2), (1, 3), (2, 4), (3, 5), (4, 6), (5, 7),
(6, 8), (3, 9), (9, 10), (10, 11), (3, 4), (0, 12), (12, 13)}:
idx = bv.add_edge(u, v)
m[u, v] = idx
# for (u,v) in {(1,3), (2,4), (5,7), (10, 11), (0,12)}:
# bv.pair_edge(m[u,v])
bv.set_root()
bv.augment(bv.get_outer_edges()[0])
bv.set_root()
bv.grow(6)
bv.augment(12)
bv.set_root()
bv.grow(1)
bv.grow(6)
bv.shrink(11)
bv.augment(8)
bv.set_root()
bv.grow(13)
bv.augment(5)
bv.set_root()
bv.grow(4)
bv.expand(14)
bv.check_all()