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import pygraphviz as pgv
def test_del():
A = pgv.AGraph()
A.add_node(1, foo="bar")
# For some reasons after porting to Python 3 clear often cause infinite loop
A.delete_node("1")
assert len(A) == 0
def test_clear_node_with_attributes():
A = pgv.AGraph()
A.add_node(1, foo="bar")
# For some reasons after porting to Python 3 clear often cause infinite loop
A.clear()
assert len(A) == 0
assert A.nodes() == []
assert A.node_attr.keys() in ([], ["label"])
def test_clear_graph_attributes():
A = pgv.AGraph()
A.add_node(1, foo="bar")
A.graph_attr.update(landscape="true", ranksep="0.1")
# For some reasons after porting to Python 3 clear often cause infinite loop
A.clear()
assert len(A) == 0
assert A.nodes() == []
assert A.node_attr.keys() in ([], ["label"])
assert A.graph_attr.keys() == []
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