text: # Copyright 2017 The TensorFlow Authors. All Rights Reserved.
  #
  # 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 builtin_functions module."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import six
  
  from tensorflow.python.autograph.converters import builtin_functions
  from tensorflow.python.autograph.core import converter_testing
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.ops import array_ops
  from tensorflow.python.platform import test
  
  
  class BuiltinFunctionsTest(converter_testing.TestCase):
  
    def test_len(self):
  
      def test_fn(a):
        return len(a)
  
      with self.converted(test_fn, builtin_functions, {'len': len}) as result:
        with self.test_session() as sess:
          p = array_ops.placeholder(dtype=dtypes.int32, shape=None)
          ops = result.test_fn(p)
          self.assertEqual(sess.run(ops, {p: [0, 0, 0]}), 3)
  
    def test_print(self):
  
      if six.PY2:
        return
  
      def test_fn(a):
        return print(a)
  
      with self.converted(test_fn, builtin_functions, {'print': print}) as result:
        with self.test_session() as sess:
          with self.assertPrints('a\n'):
            sess.run(result.test_fn('a'))
  
    def test_print_multiple_values(self):
  
      if six.PY2:
        return
  
      def test_fn(a, b, c):
        return print(a, b, c)
  
      with self.converted(test_fn, builtin_functions, {'print': print}) as result:
        with self.test_session() as sess:
          with self.assertPrints('a 1 [2, 3]\n'):
            sess.run(
                result.test_fn(
                    constant_op.constant('a'), constant_op.constant(1), [2, 3]))
  
    def test_conversion_robust_to_unhashable_callables(self):
  
      def test_fn():
        return foo()  # pylint:disable=undefined-variable
  
      with self.converted(test_fn, builtin_functions, {'foo': {
          'a': 'b'
      }.keys}) as result:
        self.assertListEqual(list(result.test_fn()), ['a'])
  
  
  if __name__ == '__main__':
    test.main()
  