code: def testMergeOptions(self):
      options1, options2 = _TestOptions(), _TestOptions()
      with self.assertRaises(ValueError):
          options.merge_options()
      merged_options = options.merge_options(options1, options2)
      self.assertEqual(merged_options.x, 42)
      self.assertEqual(merged_options.y, 3.14)
      options1.x = 0
      options2.y = 0.0
      merged_options = options.merge_options(options1, options2)
      self.assertEqual(merged_options.x, 0)
      self.assertEqual(merged_options.y, 0.0)
  
imports: from absl.testing import parameterized
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.util import options
  from tensorflow.python.framework import combinations
  from tensorflow.python.platform import test
label_desc: Use image node_id 3 for calling the OptionsTest obj's underlying member method code with example usage: obj.testMergeOptions() without return types