# How to use test_unreachable method in autotest

Best Python code snippet using autotest_python

test_dominance.py

Source:test_dominance.py

`...24 n = 525 G = nx.cycle_graph(n, create_using=nx.DiGraph())26 assert_equal(nx.immediate_dominators(G, 0),27 {i: max(i - 1, 0) for i in range(n)})28 def test_unreachable(self):29 n = 530 assert_greater(n, 1)31 G = nx.path_graph(n, create_using=nx.DiGraph())32 assert_equal(nx.immediate_dominators(G, n // 2),33 {i: max(i - 1, n // 2) for i in range(n // 2, n)})34 def test_irreducible1(self):35 # Graph taken from Figure 2 of36 # K. D. Cooper, T. J. Harvey, and K. Kennedy.37 # A simple, fast dominance algorithm.38 # Software Practice & Experience, 4:110, 2001.39 edges = [(1, 2), (2, 1), (3, 2), (4, 1), (5, 3), (5, 4)]40 G = nx.DiGraph(edges)41 assert_equal(nx.immediate_dominators(G, 5),42 {i: 5 for i in range(1, 6)})43 def test_irreducible2(self):44 # Graph taken from Figure 4 of45 # K. D. Cooper, T. J. Harvey, and K. Kennedy.46 # A simple, fast dominance algorithm.47 # Software Practice & Experience, 4:110, 2001.48 edges = [(1, 2), (2, 1), (2, 3), (3, 2), (4, 2), (4, 3), (5, 1),49 (6, 4), (6, 5)]50 G = nx.DiGraph(edges)51 assert_equal(nx.immediate_dominators(G, 6),52 {i: 6 for i in range(1, 7)})53 def test_domrel_png(self):54 # Graph taken from https://commons.wikipedia.org/wiki/File:Domrel.png55 edges = [(1, 2), (2, 3), (2, 4), (2, 6), (3, 5), (4, 5), (5, 2)]56 G = nx.DiGraph(edges)57 assert_equal(nx.immediate_dominators(G, 1),58 {1: 1, 2: 1, 3: 2, 4: 2, 5: 2, 6: 2})59 # Test postdominance.60 with nx.utils.reversed(G):61 assert_equal(nx.immediate_dominators(G, 6),62 {1: 2, 2: 6, 3: 5, 4: 5, 5: 2, 6: 6})63 def test_boost_example(self):64 # Graph taken from Figure 1 of65 # http://www.boost.org/doc/libs/1_56_0/libs/graph/doc/lengauer_tarjan_dominator.htm66 edges = [(0, 1), (1, 2), (1, 3), (2, 7), (3, 4), (4, 5), (4, 6),67 (5, 7), (6, 4)]68 G = nx.DiGraph(edges)69 assert_equal(nx.immediate_dominators(G, 0),70 {0: 0, 1: 0, 2: 1, 3: 1, 4: 3, 5: 4, 6: 4, 7: 1})71 # Test postdominance.72 with nx.utils.reversed(G):73 assert_equal(nx.immediate_dominators(G, 7),74 {0: 1, 1: 7, 2: 7, 3: 4, 4: 5, 5: 7, 6: 4, 7: 7})75class TestDominanceFrontiers(object):76 def test_exceptions(self):77 G = nx.Graph()78 G.add_node(0)79 assert_raises(nx.NetworkXNotImplemented, nx.dominance_frontiers, G, 0)80 G = nx.MultiGraph(G)81 assert_raises(nx.NetworkXNotImplemented, nx.dominance_frontiers, G, 0)82 G = nx.DiGraph([[0, 0]])83 assert_raises(nx.NetworkXError, nx.dominance_frontiers, G, 1)84 def test_singleton(self):85 G = nx.DiGraph()86 G.add_node(0)87 assert_equal(nx.dominance_frontiers(G, 0), {0: []})88 G.add_edge(0, 0)89 assert_equal(nx.dominance_frontiers(G, 0), {0: []})90 def test_path(self):91 n = 592 G = nx.path_graph(n, create_using=nx.DiGraph())93 assert_equal(nx.dominance_frontiers(G, 0),94 {i: [] for i in range(n)})95 def test_cycle(self):96 n = 597 G = nx.cycle_graph(n, create_using=nx.DiGraph())98 assert_equal(nx.dominance_frontiers(G, 0),99 {i: [] for i in range(n)})100 def test_unreachable(self):101 n = 5102 assert_greater(n, 1)103 G = nx.path_graph(n, create_using=nx.DiGraph())104 assert_equal(nx.dominance_frontiers(G, n // 2),105 {i: [] for i in range(n // 2, n)})106 def test_irreducible1(self):107 # Graph taken from Figure 2 of108 # K. D. Cooper, T. J. Harvey, and K. Kennedy.109 # A simple, fast dominance algorithm.110 # Software Practice & Experience, 4:110, 2001.111 edges = [(1, 2), (2, 1), (3, 2), (4, 1), (5, 3), (5, 4)]112 G = nx.DiGraph(edges)113 assert_equal({u: sorted(df)114 for u, df in nx.dominance_frontiers(G, 5).items()},...`

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