def test_rebuildIndices(self):
"""rebuild table indices"""
sm = SparseMat(3, 4, enable_indices=False)
sm[0, 0] = 10
sm[0, 2] = 0
sm[1, 3] = -5
sm[1, 2] = 1
self.assertEqual(sm._index_rows, None)
self.assertEqual(sm._index_cols, None)
sm.rebuildIndices()
self.assertEqual(sm._index_rows, [set([(0, 0)]), set([(1, 3), (1, 2)]), set([])])
self.assertEqual(sm._index_cols, [set([(0, 0)]), set([]), set([(1, 2)]), set([(1, 3)])])
