def testGraphDFS(self):
G = pygraph.graph()
G.add_nodes([1, 2, 3, 4, 5])
G.add_edge(1, 2)
G.add_edge(2, 3)
G.add_edge(2, 4)
G.add_edge(4, 5)
G.add_edge(1, 5)
G.add_edge(3, 5)
st, pre, post = depth_first_search(G, 1, filter=filters.find(5))
assert st == {1: None, 2: 1, 3: 2, 5: 3}
st, pre, post = depth_first_search(G, 1, filter=filters.find(2))
assert st == {1: None, 2: 1}
def test_bfs_in_digraph(self):
gr = testlib.new_digraph()
gr.add_node('find-me')
gr.add_edge(0, 'find-me')
st, lo = breadth_first_search(gr, root=0, filter=filters.find('find-me'))
assert st['find-me'] == 0
for each in st:
assert st[each] == None or st[each] == 0 or st[st[each]] == 0
def test_dfs_in_digraph(self):
gr = testlib.new_digraph()
gr.add_node('find-me')
gr.add_node('dont-find-me')
gr.add_edge(0, 'find-me')
gr.add_edge('find-me','dont-find-me')
st, pre, post = depth_first_search(gr, root=0, filter=filters.find('find-me'))
assert st['find-me'] == 0
assert 'dont-find-me' not in st
def testGraphBFS(self):
G = pygraph.graph()
G.add_nodes([1, 2, 3, 4, 5])
G.add_edge(1, 2)
G.add_edge(2, 3)
G.add_edge(2, 4)
G.add_edge(4, 5)
G.add_edge(1, 5)
G.add_edge(3, 5)
st, lo = breadth_first_search(G, 1, filter=filters.find(5))
assert st == {1: None, 2: 1, 5: 1}
def testDigraphDFS(self):
G = pygraph.digraph()
G.add_nodes([1, 2, 3, 4, 5, 6])
G.add_edge(1, 2)
G.add_edge(1, 3)
G.add_edge(2, 4)
G.add_edge(4, 3)
G.add_edge(5, 1)
G.add_edge(3, 5)
G.add_edge(5, 6)
st, pre, post = depth_first_search(G, 1, filter=filters.find(5))
assert st == {1: None, 2: 1, 3: 4, 4: 2, 5: 3}
def testDigraphBFS(self):
G = pygraph.digraph()
G.add_nodes([1, 2, 3, 4, 5, 6])
G.add_edge(1, 2)
G.add_edge(1, 3)
G.add_edge(2, 4)
G.add_edge(4, 3)
G.add_edge(5, 1)
G.add_edge(3, 5)
G.add_edge(5, 6)
st, lo = G.breadth_first_search(1, filter=filters.find(5))
assert st == {1: None, 2: 1, 3: 1, 4: 2, 5: 3}
def test_bfs_in_empty_graph(self):
gr = graph()
st, lo = breadth_first_search(gr, filter=filters.find(5))
assert st == {}
assert lo == []
def testEmptyGraphBFS(self):
G = pygraph.graph()
st, lo = breadth_first_search(G, filter=filters.find(5))
assert st == {}
assert lo == []
