test_base.py 文件源码

def test_empty_fancy(self):
        empty_farr = np.array([], dtype=np.float_)
        empty_iarr = np.array([], dtype=np.int_)
        empty_barr = np.array([], dtype=np.bool_)

        # pd.DatetimeIndex is excluded, because it overrides getitem and should
        # be tested separately.
        for idx in [self.strIndex, self.intIndex, self.floatIndex]:
            empty_idx = idx.__class__([])

            self.assertTrue(idx[[]].identical(empty_idx))
            self.assertTrue(idx[empty_iarr].identical(empty_idx))
            self.assertTrue(idx[empty_barr].identical(empty_idx))

            # np.ndarray only accepts ndarray of int & bool dtypes, so should
            # Index.
            self.assertRaises(IndexError, idx.__getitem__, empty_farr)