def test_replace():
chunks = chunkgraph.chunks_from_strings('a', 'b')
assert len(chunks) == 1
assert chunks[0].root.kind == 'choice'
assert chunks[0].root.data == ['a', 'b']
def test_equals():
chunks = chunkgraph.chunks_from_strings('a', 'a')
assert len(chunks) == 1
assert chunks[0].root.kind == 'concat'
assert chunks[0].root.data == 'a'
def test_delete():
chunks = chunkgraph.chunks_from_strings('a', '')
assert len(chunks) == 1
assert chunks[0].root.kind == 'concat_opt'
assert chunks[0].root.data == 'a'