def test_prefix_added_once(ctx_prefix):
test_key = ctx_prefix + "c00L"
assert test_key == ContextItem.canonicalize(test_key)
def test_canonicalize(ctx_prefix):
test_key = "toTalLy_pUbl1c_7ag"
c = ContextItem.canonicalize(test_key)
assert test_key in c
assert ctx_prefix in c