def test_datachunk_astype(self):
obj = DataChunk(data=np.arange(3), selection=np.s_[0:3])
newtype = np.dtype('int16')
obj_astype = obj.astype(newtype)
self.assertNotEqual(id(obj), id(obj_astype))
self.assertEqual(obj_astype.dtype, np.dtype(newtype))
def test_astype(self):
temp1 = DataChunk(np.arange(10).reshape(5, 2))
temp2 = temp1.astype('float32')
self.assertEqual(temp2.dtype, np.dtype('float32'))