code: def test_dtype_cast(self):
      self._test(np_dtypes.int8(0), np_dtypes.uint8(1), (1, 2))
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.framework import ops
  from tensorflow.python.ops.numpy_ops import np_array_ops
  from tensorflow.python.ops.numpy_ops import np_dtypes
  from tensorflow.python.ops.numpy_ops import np_math_ops
  from tensorflow.python.ops.numpy_ops import np_random
  from tensorflow.python.platform import test
label_desc: Use image node_id 4 for calling the UniformTest obj's underlying member method code with example usage: obj.test_dtype_cast() without return types