def test_overwrite_dtype(self):
db1 = DatasetBuilder(name='db1', data=[1, 2, 3], dtype=int)
msg = "Cannot overwrite dtype."
with self.assertRaisesWith(AttributeError, msg):
db1.dtype = float
def test_set_dtype(self):
db1 = DatasetBuilder(name='db1')
db1.dtype = float
self.assertEqual(db1.dtype, float)
