def test_get_by_id_negative(nodes):
n1, n2, n3, n4, n5, n6, n7, n8, n9, n10 = nodes
s = Nodes([n1, n2, n3])
with pytest.raises(ValueError):
s.from_id(4)
def test_get_by_id_positive(nodes):
n1, n2, n3, n4, n5, n6, n7, n8, n9, n10 = nodes
s = Nodes([n1, n2, n3])
assert s.from_id(1) == n1
assert s.from_id(2) == n2
assert s.from_id(3) == n3
