def test_del_edge(): from simple_graph import SimpleGraph instance = SimpleGraph() instance.add_edge('waffles', 'waffles2') instance.add_edge('waffles', 'waffles3') instance.del_edge('waffles', 'waffles2') assert instance.graph_dict['waffles'] == {'waffles3': 1}
def test_sg_del_edge(): """Ensure supplied edge is deleted from appropriate node.""" from simple_graph import SimpleGraph test_sg = SimpleGraph() test_sg.add_edge("B", "c") test_sg.del_edge("B", "c") assert ("B", "c") not in test_sg.edges()
def test_sg_del_edge_error(): """Ensure del_edge throws IndexError if called with node not in graph.""" from simple_graph import SimpleGraph test_sg = SimpleGraph() test_sg.add_edge("a", "b") with pytest.raises(IndexError) as message: test_sg.del_edge("c", "b") assert "That edge is not in the graph." in str(message)
def test_del_edge_key_error(): from simple_graph import SimpleGraph new_graph = SimpleGraph() new_graph.graph = {'A': {'A': 10, 'B': 25}} with pytest.raises(KeyError): new_graph.del_edge('G', 'C')
def test_del_edge_val_error(): from simple_graph import SimpleGraph new_graph = SimpleGraph() new_graph.graph = {'A': {'A': 10, 'B': 25}} with pytest.raises(ValueError): new_graph.del_edge('A', 'E')
def test_del_edge(): from simple_graph import SimpleGraph new_graph = SimpleGraph() new_graph.graph = {'A': {'A': 10, 'B': 25}} new_graph.del_edge('A', 'B') assert new_graph.graph == {'A': {'A': 10}}
def test_del_non_existent_node2(): from simple_graph import SimpleGraph instance = SimpleGraph() instance.add_node("waffles") with pytest.raises(ValueError): instance.del_edge('waffles', 'waffles2')
def test_del_non_existent_node1(): from simple_graph import SimpleGraph instance = SimpleGraph() with pytest.raises(KeyError): instance.del_edge('waffles', 'waffles2')