text: #   Copyright (c) 2020 PaddlePaddle 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.
  
  from __future__ import print_function
  
  import io
  import logging
  import os
  import sys
  import unittest
  
  import gast
  
  import paddle
  from paddle.fluid.dygraph.dygraph_to_static import logging_utils
  from unittest import mock
  
  
  class TestLoggingUtils(unittest.TestCase):
      def setUp(self):
          self.verbosity_level = 1
          self.code_level = 3
          self.translator_logger = logging_utils._TRANSLATOR_LOGGER
  
      def test_verbosity(self):
          paddle.jit.set_verbosity(None)
          os.environ[logging_utils.VERBOSITY_ENV_NAME] = '3'
          self.assertEqual(logging_utils.get_verbosity(), 3)
  
          paddle.jit.set_verbosity(self.verbosity_level)
          self.assertEqual(self.verbosity_level, logging_utils.get_verbosity())
  
          # String is not supported
          with self.assertRaises(TypeError):
              paddle.jit.set_verbosity("3")
  
          with self.assertRaises(TypeError):
              paddle.jit.set_verbosity(3.3)
  
      def test_also_to_stdout(self):
          logging_utils._TRANSLATOR_LOGGER.need_to_echo_log_to_stdout = None
          self.assertEqual(
              logging_utils._TRANSLATOR_LOGGER.need_to_echo_log_to_stdout, False)
  
          paddle.jit.set_verbosity(also_to_stdout=False)
          self.assertEqual(
              logging_utils._TRANSLATOR_LOGGER.need_to_echo_log_to_stdout, False)
  
          logging_utils._TRANSLATOR_LOGGER.need_to_echo_node_to_stdout = None
          self.assertEqual(
              logging_utils._TRANSLATOR_LOGGER.need_to_echo_code_to_stdout, False)
  
          paddle.jit.set_code_level(also_to_stdout=True)
          self.assertEqual(
              logging_utils._TRANSLATOR_LOGGER.need_to_echo_code_to_stdout, True)
  
          with self.assertRaises(AssertionError):
              paddle.jit.set_verbosity(also_to_stdout=1)
  
          with self.assertRaises(AssertionError):
              paddle.jit.set_code_level(also_to_stdout=1)
  
      def test_set_code_level(self):
          paddle.jit.set_code_level(None)
          os.environ[logging_utils.CODE_LEVEL_ENV_NAME] = '2'
          self.assertEqual(logging_utils.get_code_level(), 2)
  
          paddle.jit.set_code_level(self.code_level)
          self.assertEqual(logging_utils.get_code_level(), self.code_level)
  
          paddle.jit.set_code_level(9)
          self.assertEqual(logging_utils.get_code_level(), 9)
  
          with self.assertRaises(TypeError):
              paddle.jit.set_code_level(3.3)
  
      def test_log_api(self):
          # test api for CI Converage
          logging_utils.set_verbosity(1, True)
  
          logging_utils.warn("warn")
          logging_utils.error("error")
  
          logging_utils.log(1, "log level 1")
          logging_utils.log(2, "log level 2")
  
          source_code = "x = 3"
          ast_code = gast.parse(source_code)
          logging_utils.set_code_level(1, True)
          logging_utils.log_transformed_code(1, ast_code, "TestTransformer")
          logging_utils.set_code_level(logging_utils.LOG_AllTransformer, True)
          logging_utils.log_transformed_code(logging_utils.LOG_AllTransformer,
                                             ast_code, "TestTransformer")
  
      def test_log_message(self):
          stream = io.StringIO()
          log = self.translator_logger.logger
          stdout_handler = logging.StreamHandler(stream)
          log.addHandler(stdout_handler)
  
          warn_msg = "test_warn"
          error_msg = "test_error"
          log_msg_1 = "test_log_1"
          log_msg_2 = "test_log_2"
  
          with mock.patch.object(sys, 'stdout', stream):
              logging_utils.set_verbosity(1, False)
              logging_utils.warn(warn_msg)
              logging_utils.error(error_msg)
              logging_utils.log(1, log_msg_1)
              logging_utils.log(2, log_msg_2)
  
          result_msg = '\n'.join(
              [warn_msg, error_msg, "(Level 1) " + log_msg_1, ""])
          self.assertEqual(result_msg, stream.getvalue())
  
      def test_log_transformed_code(self):
          source_code = "x = 3"
          ast_code = gast.parse(source_code)
  
          stream = io.StringIO()
          log = self.translator_logger.logger
          stdout_handler = logging.StreamHandler(stream)
          log.addHandler(stdout_handler)
  
          with mock.patch.object(sys, 'stdout', stream):
              paddle.jit.set_code_level(1)
              logging_utils.log_transformed_code(1, ast_code,
                                                 "BasicApiTransformer")
  
              paddle.jit.set_code_level()
              logging_utils.log_transformed_code(logging_utils.LOG_AllTransformer,
                                                 ast_code, "All Transformers")
  
          self.assertIn(source_code, stream.getvalue())
  
  
  if __name__ == '__main__':
      unittest.main()
  