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1# Copyright 2018 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 slices module."""
16
17from tensorflow.python.autograph.operators import slices
18from tensorflow.python.framework import constant_op
19from tensorflow.python.ops import list_ops
20from tensorflow.python.platform import test
21
22
23class SlicesTest(test.TestCase):
24
25  def test_set_item_tensor_list(self):
26    initial_list = constant_op.constant([[1, 2], [3, 4]])
27    elem_shape = constant_op.constant([2])
28    l = list_ops.tensor_list_from_tensor(initial_list, element_shape=elem_shape)
29    l = slices.set_item(l, 0, [5, 6])
30
31    with self.cached_session() as sess:
32      t = list_ops.tensor_list_stack(l, element_dtype=initial_list.dtype)
33      self.assertAllEqual(self.evaluate(t), [[5, 6], [3, 4]])
34
35  def test_get_item_tensor_list(self):
36    initial_list = constant_op.constant([[1, 2], [3, 4]])
37    elem_shape = constant_op.constant([2])
38    l = list_ops.tensor_list_from_tensor(initial_list, element_shape=elem_shape)
39    t = slices.get_item(
40        l, 1, slices.GetItemOpts(element_dtype=initial_list.dtype))
41
42    with self.cached_session() as sess:
43      self.assertAllEqual(self.evaluate(t), [3, 4])
44
45  def test_get_item_tensor_string(self):
46    initial_str = constant_op.constant('abcd')
47    t = slices.get_item(initial_str, 1,
48                        slices.GetItemOpts(element_dtype=initial_str.dtype))
49
50    with self.cached_session() as sess:
51      self.assertEqual(self.evaluate(t), b'b')
52
53    initial_list_str = constant_op.constant(['abcd', 'bcde'])
54    t = slices.get_item(initial_list_str, 1,
55                        slices.GetItemOpts(element_dtype=initial_str.dtype))
56
57    with self.cached_session() as sess:
58      self.assertEqual(self.evaluate(t), b'bcde')
59
60
61if __name__ == '__main__':
62  test.main()
63