# Copyright 2022 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.
# ==============================================================================
"""Compat tests."""

import pickle

from tensorflow.python.platform import test
from tensorflow.python.util import compat


class CompatTest(test.TestCase):

  def testCompatValidEncoding(self):
    self.assertEqual(compat.as_bytes("hello", "utf8"), b"hello")
    self.assertEqual(compat.as_text(b"hello", "utf-8"), "hello")

  def testCompatInvalidEncoding(self):
    with self.assertRaises(LookupError):
      compat.as_bytes("hello", "invalid")

    with self.assertRaises(LookupError):
      compat.as_text(b"hello", "invalid")

  def testCompatBufferObjects(self):
    pb = pickle.PickleBuffer(b"hello")
    self.assertEqual(compat.as_bytes(pb), b"hello")
    mv = memoryview(b"world")
    self.assertEqual(compat.as_bytes(mv), b"world")

  def testCompatInvalidObjects(self):
    with self.assertRaises(TypeError):
      compat.as_bytes(5)
    with self.assertRaises(TypeError):
      compat.as_bytes([1, 2, 3])


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