1# Copyright 2019 The TensorFlow Authors. All Rights Reserved.
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#     http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14# ==============================================================================
15"""Tests for backend_config."""
16from __future__ import absolute_import
17from __future__ import division
18from __future__ import print_function
19
20from tensorflow.python import keras
21from tensorflow.python.framework import test_util
22from tensorflow.python.platform import test
23
24
25@test_util.run_all_in_graph_and_eager_modes
26class BackendConfigTest(test.TestCase):
27
28  def test_backend(self):
29    self.assertEqual(keras.backend.backend(), 'tensorflow')
30
31  def test_espilon(self):
32    epsilon = 1e-2
33    keras.backend_config.set_epsilon(epsilon)
34    self.assertEqual(keras.backend_config.epsilon(), epsilon)
35    keras.backend_config.set_epsilon(1e-7)
36    self.assertEqual(keras.backend_config.epsilon(), 1e-7)
37
38  def test_floatx(self):
39    floatx = 'float64'
40    keras.backend_config.set_floatx(floatx)
41    self.assertEqual(keras.backend_config.floatx(), floatx)
42    keras.backend_config.set_floatx('float32')
43    self.assertEqual(keras.backend_config.floatx(), 'float32')
44
45  def test_image_data_format(self):
46    image_data_format = 'channels_first'
47    keras.backend_config.set_image_data_format(image_data_format)
48    self.assertEqual(keras.backend_config.image_data_format(),
49                     image_data_format)
50    keras.backend_config.set_image_data_format('channels_last')
51    self.assertEqual(keras.backend_config.image_data_format(), 'channels_last')
52
53
54if __name__ == '__main__':
55  test.main()
56