def METHOD_NAME(self):
    class MemmapSubClass(memmap):
        pass
    fp = MemmapSubClass(self.tmpfp, dtype=self.dtype, shape=self.shape)
    fp[:] = self.data
    # We keep previous behavior for subclasses of memmap, i.e. the
    # ufunc and __getitem__ output is never turned into a ndarray
    assert_(sum(fp, axis=0).__class__ is MemmapSubClass)
    assert_(sum(fp).__class__ is MemmapSubClass)
    assert_(fp[1:, :-1].__class__ is MemmapSubClass)
    assert(fp[[0, 1]].__class__ is MemmapSubClass)