def test_remove_node():
a, b, c, d = 'a', 'b', 'c', 'd'
hbug = Hypergraph({0: [a, b], 1: [a, c], 2: [a, d]})
assert a in hbug.nodes
assert a in hbug.edges[0]
assert a in hbug.edges[1]
assert a in hbug.edges[2]
hbug.remove_node(a)
assert a not in hbug.nodes
assert a not in hbug.edges[0]
assert a not in hbug.edges[1]
assert a not in hbug.edges[2]
def test_remove_node():
a, b, c, d = "a", "b", "c", "d"
hbug = Hypergraph({0: [a, b], 1: [a, c], 2: [a, d]})
assert a in hbug.nodes
assert a in hbug.edges[0]
assert a in hbug.edges[1]
assert a in hbug.edges[2]
hbug.remove_node(a)
assert a not in hbug.nodes
assert a not in hbug.edges[0]
assert a not in hbug.edges[1]
assert a not in hbug.edges[2]