# 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 naming module."""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

from tensorflow.contrib.autograph.impl import naming
from tensorflow.python.platform import test


class NamerTest(test.TestCase):

  def test_compiled_function_name_tracks_names(self):
    def bar():
      pass

    namer = naming.Namer({}, True, None, ())
    self.assertEqual(('tf__foo', True), namer.compiled_function_name('foo'))
    self.assertEqual(('tf__bar', True), namer.compiled_function_name(
        'bar', bar))
    self.assertEqual({bar: 'tf__bar'}, namer.renamed_calls)
    self.assertItemsEqual(('tf__bar', 'tf__foo'), namer.generated_names)

  def test_compiled_function_name_consistent(self):
    def foo():
      pass

    namer = naming.Namer({}, True, None, ())
    self.assertEqual(('tf__foo', True), namer.compiled_function_name(
        'foo', foo))
    self.assertEqual(('tf__foo', True), namer.compiled_function_name(
        'foo', foo))

  def test_compiled_function_name_avoids_global_conflicts(self):
    def foo():
      pass

    namer = naming.Namer({'tf__foo': 1}, True, None, ())
    self.assertEqual(('tf__foo_1', True),
                     namer.compiled_function_name('foo', foo))

  def test_new_symbol_tracks_names(self):
    namer = naming.Namer({}, True, None, ())
    self.assertEqual('temp', namer.new_symbol('temp', set()))
    self.assertItemsEqual(('temp',), namer.generated_names)

  def test_new_symbol_avoids_duplicates(self):
    namer = naming.Namer({}, True, None, ())
    self.assertEqual('temp', namer.new_symbol('temp', set()))
    self.assertEqual('temp_1', namer.new_symbol('temp', set()))
    self.assertItemsEqual(('temp', 'temp_1'), namer.generated_names)

  def test_new_symbol_avoids_conflicts(self):
    namer = naming.Namer({'temp': 1}, True, None, ())
    # temp is reserved in the global namespace
    self.assertEqual('temp_1', namer.new_symbol('temp', set()))
    # temp_2 is reserved in the local namespace
    self.assertEqual('temp_3', namer.new_symbol('temp', set(('temp_2',))))
    self.assertItemsEqual(('temp_1', 'temp_3'), namer.generated_names)


if __name__ == '__main__':
  test.main()
