class TestGraphLadder(unittest.TestCase):
def setUp(self):
self.N = 8 # number of nodes
self.G = Graph(self.N)
self.edges = [
Edge(0, 1, 2),
Edge(0, 2, 1),
Edge(2, 3, 5),
Edge(1, 3, 3),
Edge(2, 4, 4),
Edge(3, 5, 6),
Edge(4, 6, 7),
Edge(4, 5, 8),
Edge(5, 7, 9),
Edge(6, 7, 10)
]
for edge in self.edges:
self.G.add_edge(edge)
def test_basic(self):
self.assertFalse(self.G.is_directed())
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), len(self.edges))
def test_edges(self):
for edge in self.edges:
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(self.G.weight(edge), edge.weight)
self.assertFalse(self.G.has_edge(Edge(0, 3)))
self.assertEqual(self.G.weight(Edge(0, 3)), 0) # no edge
def test_del(self):
self.assertEqual(self.G.e(), 10)
self.G.del_node(7)
self.assertEqual(self.G.e(), 8)
self.G.del_node(2)
self.assertEqual(self.G.e(), 5)
def test_adjacent(self):
for node in self.G.iteradjacent(0):
self.assertTrue(node in [1, 2])
for node in self.G.iteradjacent(2):
self.assertTrue(node in [0, 3, 4])
def tearDown(self):
pass
class TestGraphLadder(unittest.TestCase):
def setUp(self):
self.N = 8 # number of nodes
self.G = Graph(self.N)
self.edges = [
Edge(0, 1, 2), Edge(0, 2, 1), Edge(2, 3, 5),
Edge(1, 3, 3), Edge(2, 4, 4), Edge(3, 5, 6), Edge(4, 6, 7),
Edge(4, 5, 8), Edge(5, 7, 9), Edge(6, 7, 10)]
for edge in self.edges:
self.G.add_edge(edge)
def test_basic(self):
self.assertFalse(self.G.is_directed())
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), len(self.edges))
def test_edges(self):
for edge in self.edges:
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(self.G.weight(edge), edge.weight)
self.assertFalse(self.G.has_edge(Edge(0, 3)))
self.assertEqual(self.G.weight(Edge(0, 3)), 0) # no edge
def test_del(self):
self.assertEqual(self.G.e(), 10)
self.G.del_node(7)
self.assertEqual(self.G.e(), 8)
self.G.del_node(2)
self.assertEqual(self.G.e(), 5)
def test_adjacent(self):
for node in self.G.iteradjacent(0):
self.assertTrue(node in [1, 2])
for node in self.G.iteradjacent(2):
self.assertTrue(node in [0, 3, 4])
def tearDown(self): pass
class TestGraphUndirected(unittest.TestCase):
def setUp(self):
self.N = 4 # number of nodes
self.G = Graph(self.N)
self.nodes = ["A", "B", "C", "D"]
self.edges = [
Edge("A", "B", 2),
Edge("B", "C", 4),
Edge("C", "A", 6),
Edge("C", "D", 3),
Edge("D", "B", 5)
]
for node in self.nodes:
self.G.add_node(node)
for edge in self.edges:
self.G.add_edge(edge)
#self.G.show()
def test_undirected(self):
self.assertFalse(self.G.is_directed())
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), 5)
self.G.del_node("B")
self.assertEqual(self.G.v(), 3)
self.assertEqual(self.G.e(), 2)
def test_iteredges(self):
inedges_B = list(self.G.iterinedges("B"))
outedges_B = list(self.G.iteroutedges("B"))
#print inedges_B, outedges_B
self.assertEqual(len(inedges_B), 3)
self.assertEqual(len(outedges_B), 3)
def test_iteredges_connected(self):
start_edge = next(self.G.iteredges())
A = set([start_edge.source, start_edge.target])
for edge in self.G.iteredges_connected(start_edge):
B = set([edge.source, edge.target])
self.assertTrue(len(A & B) > 0)
A.update(B)
#print ( A )
def test_copy(self):
T = self.G.copy()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(edge))
def test_transpose(self):
T = self.G.transpose()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(~edge))
def test_complement(self):
T = self.G.complement()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.N * (self.N - 1) / 2 - self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertFalse(self.G.has_edge(edge))
for edge in self.G.iteredges():
self.assertFalse(T.has_edge(edge))
def test_subgraph(self):
T = self.G.subgraph(["A", "B", "C"])
self.assertEqual(T.v(), 3)
self.assertEqual(T.e(), 3)
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(edge))
def test_degree(self):
self.assertEqual(self.G.degree("A"), 2)
self.assertEqual(self.G.degree("B"), 3)
self.assertEqual(self.G.degree("C"), 3)
self.assertEqual(self.G.degree("D"), 2)
def test_add_graph_undirected(self):
T = Graph(self.N)
for node in self.nodes:
T.add_node(node)
T.add_edge(Edge("A", "D", 9))
self.assertEqual(T.v(), self.N)
self.assertEqual(T.e(), 1)
self.G.add_graph(T)
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), 6)
def test_load_save(self):
name1 = "undirected_graph.txt"
name2 = "undirected_graph.lgl"
name3 = "undirected_graph.ncol"
self.G.save(name1)
self.G.save_lgl(name2)
self.G.save_ncol(name3)
T = Graph.load(name1)
self.assertEqual(self.G, T)
def tearDown(self):
pass
class TestGraphDirected(unittest.TestCase):
def setUp(self):
self.N = 4 # number of nodes
self.G = Graph(self.N, directed=True)
self.nodes = ["A", "B", "C", "D"]
self.edges = [
Edge("A", "B", 2),
Edge("B", "C", 4),
Edge("C", "A", 6),
Edge("C", "D", 3),
Edge("D", "B", 5)
]
for node in self.nodes:
self.G.add_node(node)
for edge in self.edges:
self.G.add_edge(edge)
#self.G.show()
def test_directed(self):
self.assertTrue(self.G.is_directed())
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), 5)
self.G.del_node("B")
self.assertEqual(self.G.v(), 3)
self.assertEqual(self.G.e(), 2)
def test_cmp(self):
T = Graph(self.N)
self.assertFalse(T == self.G, "directed and undirected graphs")
T = Graph(self.N, directed=True)
for node in ["A", "B", "C", "X"]:
T.add_node(node)
self.assertFalse(T == self.G, "nodes are different")
T.del_node("X")
self.assertFalse(T == self.G, "numbers of nodes are different")
T.add_node("D")
T.add_edge(Edge("A", "B", 2))
T.add_edge(Edge("B", "C", 4))
T.add_edge(Edge("C", "A", 6))
T.add_edge(Edge("C", "D", 3))
self.assertFalse(T == self.G, "edge numbers are different")
T.add_edge(Edge("D", "B", 7))
self.assertFalse(T == self.G, "edge weights are different")
T.del_edge(Edge("D", "B", 7))
T.add_edge(Edge("B", "D", 5))
self.assertFalse(T == self.G, "edge directions are different")
T.del_edge(Edge("B", "D", 5))
T.add_edge(Edge("D", "B", 5))
self.assertTrue(T == self.G, "graphs are the same")
def test_iteredges(self):
inedges_B = list(self.G.iterinedges("B"))
outedges_B = list(self.G.iteroutedges("B"))
#print inedges_B, outedges_B
self.assertEqual(len(inedges_B), 2)
self.assertEqual(len(outedges_B), 1)
def test_copy(self):
T = self.G.copy()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(edge))
def test_transpose(self):
T = self.G.transpose()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(~edge))
def test_complement(self):
T = self.G.complement()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.N * (self.N - 1) - self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertFalse(self.G.has_edge(edge))
for edge in self.G.iteredges():
self.assertFalse(T.has_edge(edge))
def test_subgraph(self):
T = self.G.subgraph(["A", "B", "C"])
self.assertEqual(T.v(), 3)
self.assertEqual(T.e(), 3)
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(edge))
def test_add_graph_directed(self):
T = Graph(self.N, directed=True)
for node in self.nodes:
T.add_node(node)
T.add_edge(Edge("A", "D", 9))
self.assertEqual(T.v(), self.N)
self.assertEqual(T.e(), 1)
self.G.add_graph(T)
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), 6)
def test_degree(self):
self.assertEqual(self.G.indegree("A"), 1)
self.assertEqual(self.G.indegree("B"), 2)
self.assertEqual(self.G.indegree("C"), 1)
self.assertEqual(self.G.indegree("D"), 1)
self.assertEqual(self.G.outdegree("A"), 1)
self.assertEqual(self.G.outdegree("B"), 1)
self.assertEqual(self.G.outdegree("C"), 2)
self.assertEqual(self.G.outdegree("D"), 1)
def test_exceptions(self):
self.assertRaises(ValueError, self.G.add_edge, Edge("A", "A", 1))
self.assertRaises(ValueError, self.G.add_edge, Edge("A", "B", 2))
self.assertRaises(ValueError, self.G.degree, "A")
def tearDown(self):
pass
class TestGraphUndirected(unittest.TestCase):
def setUp(self):
self.N = 4 # number of nodes
self.G = Graph(self.N)
self.nodes = ["A", "B", "C", "D"]
self.edges = [
Edge("A", "B", 2), Edge("B", "C", 4), Edge("C", "A", 6),
Edge("C", "D", 3), Edge("D", "B", 5)]
for node in self.nodes:
self.G.add_node(node)
for edge in self.edges:
self.G.add_edge(edge)
#self.G.show()
def test_undirected(self):
self.assertFalse(self.G.is_directed())
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), 5)
self.G.del_node("B")
self.assertEqual(self.G.v(), 3)
self.assertEqual(self.G.e(), 2)
def test_iteredges(self):
inedges_B = list(self.G.iterinedges("B"))
outedges_B = list(self.G.iteroutedges("B"))
#print inedges_B, outedges_B
self.assertEqual(len(inedges_B), 3)
self.assertEqual(len(outedges_B), 3)
def test_copy(self):
T = self.G.copy()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(edge))
def test_transpose(self):
T = self.G.transpose()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(~edge))
def test_complement(self):
T = self.G.complement()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.N*(self.N-1)/2 - self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertFalse(self.G.has_edge(edge))
for edge in self.G.iteredges():
self.assertFalse(T.has_edge(edge))
def test_subgraph(self):
T = self.G.subgraph(["A", "B", "C"])
self.assertEqual(T.v(), 3)
self.assertEqual(T.e(), 3)
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(edge))
def test_degree(self):
self.assertEqual(self.G.degree("A"), 2)
self.assertEqual(self.G.degree("B"), 3)
self.assertEqual(self.G.degree("C"), 3)
self.assertEqual(self.G.degree("D"), 2)
def test_add_graph_undirected(self):
T = Graph(self.N)
for node in self.nodes:
T.add_node(node)
T.add_edge(Edge("A", "D", 9))
self.assertEqual(T.v(), self.N)
self.assertEqual(T.e(), 1)
self.G.add_graph(T)
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), 6)
def test_load_save(self):
name1 = "undirected_graph.txt"
name2 = "undirected_graph.lgl"
name3 = "undirected_graph.ncol"
self.G.save(name1)
self.G.save_lgl(name2)
self.G.save_ncol(name3)
T = Graph.load(name1)
self.assertEqual(self.G, T)
def tearDown(self): pass
class TestGraphDirected(unittest.TestCase):
def setUp(self):
self.N = 4 # number of nodes
self.G = Graph(self.N, directed=True)
self.nodes = ["A", "B", "C", "D"]
self.edges = [
Edge("A", "B", 2), Edge("B", "C", 4), Edge("C", "A", 6),
Edge("C", "D", 3), Edge("D", "B", 5)]
for node in self.nodes:
self.G.add_node(node)
for edge in self.edges:
self.G.add_edge(edge)
#self.G.show()
def test_directed(self):
self.assertTrue(self.G.is_directed())
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), 5)
self.G.del_node("B")
self.assertEqual(self.G.v(), 3)
self.assertEqual(self.G.e(), 2)
def test_cmp(self):
T = Graph(self.N)
self.assertFalse(T == self.G, "directed and undirected graphs")
T = Graph(self.N, directed=True)
for node in ["A", "B", "C", "X"]:
T.add_node(node)
self.assertFalse(T == self.G, "nodes are different")
T.del_node("X")
self.assertFalse(T == self.G, "numbers of nodes are different")
T.add_node("D")
T.add_edge(Edge("A", "B", 2))
T.add_edge(Edge("B", "C", 4))
T.add_edge(Edge("C", "A", 6))
T.add_edge(Edge("C", "D", 3))
self.assertFalse(T == self.G, "edge numbers are different")
T.add_edge(Edge("D", "B", 7))
self.assertFalse(T == self.G, "edge weights are different")
T.del_edge(Edge("D", "B", 7))
T.add_edge(Edge("B", "D", 5))
self.assertFalse(T == self.G, "edge directions are different")
T.del_edge(Edge("B", "D", 5))
T.add_edge(Edge("D", "B", 5))
self.assertTrue(T == self.G, "graphs are the same")
def test_iteredges(self):
inedges_B = list(self.G.iterinedges("B"))
outedges_B = list(self.G.iteroutedges("B"))
#print inedges_B, outedges_B
self.assertEqual(len(inedges_B), 2)
self.assertEqual(len(outedges_B), 1)
def test_copy(self):
T = self.G.copy()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(edge))
def test_transpose(self):
T = self.G.transpose()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(~edge))
def test_complement(self):
T = self.G.complement()
self.assertEqual(T.v(), self.G.v())
self.assertEqual(T.e(), self.N*(self.N-1) - self.G.e())
for node in T.iternodes():
self.assertTrue(self.G.has_node(node))
for edge in T.iteredges():
self.assertFalse(self.G.has_edge(edge))
for edge in self.G.iteredges():
self.assertFalse(T.has_edge(edge))
def test_subgraph(self):
T = self.G.subgraph(["A", "B", "C"])
self.assertEqual(T.v(), 3)
self.assertEqual(T.e(), 3)
for edge in T.iteredges():
self.assertTrue(self.G.has_edge(edge))
def test_add_graph_directed(self):
T = Graph(self.N, directed=True)
for node in self.nodes:
T.add_node(node)
T.add_edge(Edge("A", "D", 9))
self.assertEqual(T.v(), self.N)
self.assertEqual(T.e(), 1)
self.G.add_graph(T)
self.assertEqual(self.G.v(), self.N)
self.assertEqual(self.G.e(), 6)
def test_degree(self):
self.assertEqual(self.G.indegree("A"), 1)
self.assertEqual(self.G.indegree("B"), 2)
self.assertEqual(self.G.indegree("C"), 1)
self.assertEqual(self.G.indegree("D"), 1)
self.assertEqual(self.G.outdegree("A"), 1)
self.assertEqual(self.G.outdegree("B"), 1)
self.assertEqual(self.G.outdegree("C"), 2)
self.assertEqual(self.G.outdegree("D"), 1)
def test_exceptions(self):
self.assertRaises(ValueError, self.G.add_edge, Edge("A", "A", 1))
self.assertRaises(ValueError, self.G.add_edge, Edge("A", "B", 2))
self.assertRaises(ValueError, self.G.degree, "A")
def tearDown(self): pass
class TestDFS(unittest.TestCase):
def setUp(self):
# The graph from Cormen p.607
self.N = 8 # number of nodes
self.G = Graph(self.N)
self.nodes = range(self.N)
self.edges = [
Edge(0, 4, 2), Edge(0, 1, 3), Edge(1, 5, 4), Edge(5, 2, 5),
Edge(5, 6, 6), Edge(2, 6, 7), Edge(2, 3, 8), Edge(6, 3, 9),
Edge(6, 7, 10), Edge(3, 7, 11)]
for node in self.nodes:
self.G.add_node(node)
for edge in self.edges:
self.G.add_edge(edge)
#print self.G
#self.G.show()
def test_dfs_with_stack(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = DFSWithStack(self.G)
algorithm.run(1, pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
pre_order_expected = [1, 0, 5, 2, 6, 3, 7, 4]
post_order_expected = [1, 5, 6, 7, 3, 2, 0, 4]
self.assertEqual(pre_order, pre_order_expected)
self.assertEqual(post_order, post_order_expected)
dd_expected = {0: 2, 1: 1, 2: 5, 3: 8, 4: 14, 5: 3, 6: 6, 7: 9}
ff_expected = {0: 15, 1: 4, 2: 13, 3: 12, 4: 16, 5: 7, 6: 10, 7: 11}
self.assertEqual(algorithm.dd, dd_expected)
self.assertEqual(algorithm.ff, ff_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 6, 4: 0, 5: 1, 6: 5, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N-1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def test_dfs_with_recursion(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = DFSWithRecursion(self.G)
algorithm.run(1, pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
pre_order_expected = [1, 0, 4, 5, 2, 3, 6, 7]
post_order_expected = [4, 0, 7, 6, 3, 2, 5, 1]
self.assertEqual(pre_order, pre_order_expected)
self.assertEqual(post_order, post_order_expected)
dd_expected = {0: 2, 1: 1, 2: 7, 3: 8, 4: 3, 5: 6, 6: 9, 7: 10}
ff_expected = {0: 5, 1: 16, 2: 14, 3: 13, 4: 4, 5: 15, 6: 12, 7: 11}
self.assertEqual(algorithm.dd, dd_expected)
self.assertEqual(algorithm.ff, ff_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 2, 4: 0, 5: 1, 6: 3, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 2, 3, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N-1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def test_simple_dfs_with_recursion(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = SimpleDFS(self.G)
algorithm.run(1, pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
pre_order_expected = [1, 0, 4, 5, 2, 3, 6, 7]
post_order_expected = [4, 0, 7, 6, 3, 2, 5, 1]
self.assertEqual(pre_order, pre_order_expected)
self.assertEqual(post_order, post_order_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 2, 4: 0, 5: 1, 6: 3, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 2, 3, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N-1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def tearDown(self): pass
class TestDFS(unittest.TestCase):
def setUp(self):
# The graph from Cormen p.607
self.N = 8 # number of nodes
self.G = Graph(self.N)
self.nodes = range(self.N)
self.edges = [
Edge(0, 4, 2),
Edge(0, 1, 3),
Edge(1, 5, 4),
Edge(5, 2, 5),
Edge(5, 6, 6),
Edge(2, 6, 7),
Edge(2, 3, 8),
Edge(6, 3, 9),
Edge(6, 7, 10),
Edge(3, 7, 11)
]
for node in self.nodes:
self.G.add_node(node)
for edge in self.edges:
self.G.add_edge(edge)
#print self.G
#self.G.show()
def test_dfs_with_stack(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = DFSWithStack(self.G)
algorithm.run(1,
pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
pre_order_expected = [1, 0, 5, 2, 6, 3, 7, 4]
post_order_expected = [1, 5, 6, 7, 3, 2, 0, 4]
self.assertEqual(pre_order, pre_order_expected)
self.assertEqual(post_order, post_order_expected)
dd_expected = {0: 2, 1: 1, 2: 5, 3: 8, 4: 14, 5: 3, 6: 6, 7: 9}
ff_expected = {0: 15, 1: 4, 2: 13, 3: 12, 4: 16, 5: 7, 6: 10, 7: 11}
self.assertEqual(algorithm.dd, dd_expected)
self.assertEqual(algorithm.ff, ff_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 6, 4: 0, 5: 1, 6: 5, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N - 1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def test_dfs_with_recursion(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = DFSWithRecursion(self.G)
algorithm.run(1,
pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
pre_order_expected = [1, 0, 4, 5, 2, 3, 6, 7]
post_order_expected = [4, 0, 7, 6, 3, 2, 5, 1]
self.assertEqual(pre_order, pre_order_expected)
self.assertEqual(post_order, post_order_expected)
dd_expected = {0: 2, 1: 1, 2: 7, 3: 8, 4: 3, 5: 6, 6: 9, 7: 10}
ff_expected = {0: 5, 1: 16, 2: 14, 3: 13, 4: 4, 5: 15, 6: 12, 7: 11}
self.assertEqual(algorithm.dd, dd_expected)
self.assertEqual(algorithm.ff, ff_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 2, 4: 0, 5: 1, 6: 3, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 2, 3, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N - 1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def test_simple_dfs_with_recursion(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = SimpleDFS(self.G)
algorithm.run(1,
pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
pre_order_expected = [1, 0, 4, 5, 2, 3, 6, 7]
post_order_expected = [4, 0, 7, 6, 3, 2, 5, 1]
self.assertEqual(pre_order, pre_order_expected)
self.assertEqual(post_order, post_order_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 2, 4: 0, 5: 1, 6: 3, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 2, 3, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N - 1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def tearDown(self):
pass
class TestBFS(unittest.TestCase):
def setUp(self):
# The graph from Cormen p.607
self.N = 8 # number of nodes
self.G = Graph(self.N)
self.nodes = range(self.N)
self.edges = [
Edge(0, 4, 2),
Edge(0, 1, 3),
Edge(1, 5, 4),
Edge(5, 2, 5),
Edge(5, 6, 6),
Edge(2, 6, 7),
Edge(2, 3, 8),
Edge(6, 3, 9),
Edge(6, 7, 10),
Edge(3, 7, 11)
]
for node in self.nodes:
self.G.add_node(node)
for edge in self.edges:
self.G.add_edge(edge)
#print self.G
#self.G.show()
def test_bfs(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = BFSWithQueue(self.G)
algorithm.run(1,
pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
order_expected = [1, 0, 5, 4, 2, 6, 3, 7]
self.assertEqual(pre_order, order_expected)
self.assertEqual(post_order, order_expected)
distance_expected = {0: 1, 1: 0, 2: 2, 3: 3, 4: 2, 5: 1, 6: 2, 7: 3}
self.assertEqual(algorithm.distance, distance_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 2, 4: 0, 5: 1, 6: 5, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
self.assertRaises(ValueError, algorithm.path, 4, 7)
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N - 1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def test_simple_bfs(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = SimpleBFS(self.G)
algorithm.run(1,
pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
order_expected = [1, 0, 5, 4, 2, 6, 3, 7]
self.assertEqual(pre_order, order_expected)
self.assertEqual(post_order, order_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 2, 4: 0, 5: 1, 6: 5, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
self.assertRaises(ValueError, algorithm.path, 4, 7)
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N - 1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def tearDown(self):
pass
class TestBFS(unittest.TestCase):
def setUp(self):
# The graph from Cormen p.607
self.N = 8 # number of nodes
self.G = Graph(self.N)
self.nodes = range(self.N)
self.edges = [
Edge(0, 4, 2), Edge(0, 1, 3), Edge(1, 5, 4), Edge(5, 2, 5),
Edge(5, 6, 6), Edge(2, 6, 7), Edge(2, 3, 8), Edge(6, 3, 9),
Edge(6, 7, 10), Edge(3, 7, 11)]
for node in self.nodes:
self.G.add_node(node)
for edge in self.edges:
self.G.add_edge(edge)
#print self.G
#self.G.show()
def test_bfs(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = BFSWithQueue(self.G)
algorithm.run(1, pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
order_expected = [1, 0, 5, 4, 2, 6, 3, 7]
self.assertEqual(pre_order, order_expected)
self.assertEqual(post_order, order_expected)
distance_expected = {0: 1, 1: 0, 2: 2, 3: 3, 4: 2, 5: 1, 6: 2, 7: 3}
self.assertEqual(algorithm.distance, distance_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 2, 4: 0, 5: 1, 6: 5, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
self.assertRaises(ValueError, algorithm.path, 4, 7)
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N-1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def test_simple_bfs(self):
self.assertEqual(self.G.v(), self.N)
pre_order = []
post_order = []
algorithm = SimpleBFS(self.G)
algorithm.run(1, pre_action=lambda node: pre_order.append(node),
post_action=lambda node: post_order.append(node))
order_expected = [1, 0, 5, 4, 2, 6, 3, 7]
self.assertEqual(pre_order, order_expected)
self.assertEqual(post_order, order_expected)
parent_expected = {0: 1, 1: None, 2: 5, 3: 2, 4: 0, 5: 1, 6: 5, 7: 6}
self.assertEqual(algorithm.parent, parent_expected)
self.assertEqual(algorithm.path(1, 7), [1, 5, 6, 7])
self.assertEqual(algorithm.path(1, 4), [1, 0, 4])
self.assertRaises(ValueError, algorithm.path, 4, 7)
#algorithm.dag.show()
self.assertEqual(algorithm.dag.v(), self.N)
self.assertEqual(algorithm.dag.e(), self.N-1)
self.assertTrue(algorithm.dag.is_directed())
for edge in algorithm.dag.iteredges():
self.assertTrue(self.G.has_edge(edge))
self.assertEqual(edge.weight, self.G.weight(edge))
def tearDown(self): pass
