def test_chunk_string(self):
chunks = Commons.chunk_string("a"*500, 100)
assert len(chunks) == 5, "Did not return correct number of chunks"
for chunk in chunks:
assert len(chunk) <= 100, "Chunk of string is too long"
chunks = Commons.chunk_string("", 100)
assert len(chunks) == 0, "Did not handle empty string correctly."
