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import logging
import pytest
from rdflib import BNode, Graph, Literal, URIRef
from rdflib.collection import Collection
def test_scenario() -> None:
# Taken from https://github.com/RDFLib/rdflib/blob/8a92d3565bf2e502a7c4cadb34b29db72c89d623/rdflib/collection.py#L272-L304
g = Graph()
c = Collection(g, BNode())
assert len(c) == 0
c = Collection(g, BNode(), [Literal("1"), Literal("2"), Literal("3"), Literal("4")])
assert len(c) == 4
assert c[1] == Literal("2"), c[1]
del c[1]
assert list(c) == [Literal("1"), Literal("3"), Literal("4")], list(c)
with pytest.raises(IndexError):
del c[500]
c.append(Literal("5"))
logging.debug("list(c) = %s", list(c))
for i in c:
logging.debug("i = %s", i)
del c[3]
c.clear()
assert len(c) == 0
def test_empty_list() -> None:
nil = URIRef("http://www.w3.org/1999/02/22-rdf-syntax-ns#nil")
g = Graph()
c = Collection(g, nil)
assert set(g) == set(), "Collection changed the graph"
assert len(c) == 0
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