code: def testOutputEmpty(self):
      with self.cached_session():
          for op in math_ops.argmin, math_ops.argmax:
              ret = op(array_ops.zeros(shape=[1, 0, 2]), axis=-1).eval()
              self.assertEqual(ret.shape, (1, 0))
  
imports: import functools
  from absl.testing import parameterized
  import numpy
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 10 for calling the ArgMaxTest obj's underlying member method code with example usage: obj.testOutputEmpty() without return types