def _check_copy(self, test, expect):
        f = FrameSet(test)
        r = f.copy()
        self.assertIsNot(f, r)
        self.assertEqual(f, r)
Harness to test if the FrameSet.copy call works properly.
dataset/ETHPy150Open sqlboy/fileseq/test/run.py/TestFrameSet._check_copy