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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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