# Copyright 2015 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 tensorflow.tools.common.public_api."""

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

from tensorflow.python.platform import googletest
from tensorflow.tools.common import public_api


class PublicApiTest(googletest.TestCase):

  class TestVisitor(object):

    def __init__(self):
      self.symbols = set()
      self.last_parent = None
      self.last_children = None

    def __call__(self, path, parent, children):
      self.symbols.add(path)
      self.last_parent = parent
      self.last_children = list(children)  # Make a copy to preserve state.

  def test_call_forward(self):
    visitor = self.TestVisitor()
    children = [('name1', 'thing1'), ('name2', 'thing2')]
    public_api.PublicAPIVisitor(visitor)('test', 'dummy', children)
    self.assertEqual(set(['test']), visitor.symbols)
    self.assertEqual('dummy', visitor.last_parent)
    self.assertEqual([('name1', 'thing1'), ('name2', 'thing2')],
                     visitor.last_children)

  def test_private_child_removal(self):
    visitor = self.TestVisitor()
    children = [('name1', 'thing1'), ('_name2', 'thing2')]
    public_api.PublicAPIVisitor(visitor)('test', 'dummy', children)
    # Make sure the private symbols are removed before the visitor is called.
    self.assertEqual([('name1', 'thing1')], visitor.last_children)
    self.assertEqual([('name1', 'thing1')], children)

  def test_no_descent_child_removal(self):
    visitor = self.TestVisitor()
    children = [('name1', 'thing1'), ('mock', 'thing2')]
    public_api.PublicAPIVisitor(visitor)('test', 'dummy', children)
    # Make sure not-to-be-descended-into symbols are removed after the visitor
    # is called.
    self.assertEqual([('name1', 'thing1'), ('mock', 'thing2')],
                     visitor.last_children)
    self.assertEqual([('name1', 'thing1')], children)


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