text: # 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 tensorflow_datasets.core.lazy_imports."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  from absl.testing import parameterized
  import six
  import tensorflow_datasets as tfds
  from tensorflow_datasets import testing
  
  
  class LazyImportsTest(testing.TestCase, parameterized.TestCase):
  
    @parameterized.parameters(
        "cv2",
        "matplotlib",
        "mwparserfromhell",
        "os",
        "pydub",
        "pyplot",
        "scipy",
        "skimage",
    )
    def test_import(self, module_name):
      # TODO(rsepassi): Re-enable skimage on Py3 (b/129964829)
      if module_name == "skimage" and six.PY3:
        return
      getattr(tfds.core.lazy_imports, module_name)
  
    def test_bad_import(self):
      with self.assertRaisesWithPredicateMatch(ImportError, "extras_require"):
        _ = tfds.core.lazy_imports.test_foo
  
  
  if __name__ == "__main__":
    testing.test_main()
  