new_contents: # coding=utf-8
  # Copyright 2019 The TensorFlow Datasets Authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Tests for coco dataset module."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  from tensorflow_datasets import testing
  from tensorflow_datasets.image import coco
  
  import tensorflow_datasets as tfds
  
  
  class Coco2014Test(testing.DatasetBuilderTestCase):
    
    DATASET_CLASS = coco.Coco2014 
    
    SPLITS = {
        tfds.Split.TRAIN: 5,
        tfds.Split.VALIDATION: 2,
        tfds.Split.TEST: 2,
        "test2015": 2,
    }
    
    DL_EXTRACT_RESULT = {
        "train_images": "train_images",
        "val_images": "val_images",
        "trainval_annotations": "trainval_annotations",
        "test_images": "test_images",
        "test_annotations": "test_annotations",
        "test2015_images": "test2015_images", 
        "test2015_annotations": "test2015_annotations",
    }
  
  
  if __name__ == "__main__":
    testing.test_main()
  
subject: add coco_test.py