def test_excludes_contexts():
iom = IOMemory()
iom.add((URIRef('http://example.org/a'), URIRef('http://example.org/b'),
URIRef('http://example.org/c')),
context='http://example.org/ctx')
bds = BundleDependencyStore(iom, excludes=set(['http://example.org/ctx']))
assert set([]) == set(bds.contexts())
def test_empty_contexts_without_excludes():
iom = IOMemory()
bds = BundleDependencyStore(iom)
assert set([]) == set(bds.contexts())
def test_empty_contexts_with_excludes():
iom = IOMemory()
bds = BundleDependencyStore(iom, excludes=set(['http://example.org/ctx']))
assert set([]) == set(bds.contexts())