text: # Copyright 2020 D-Wave Systems Inc.
  #
  # 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.
  
  import unittest
  
  from dwave.inspector.utils import itemsgetter
  
  
  class TestItemsgetter(unittest.TestCase):
  
      def test_nil(self):
          with self.assertRaises(TypeError):
              itemsgetter()
  
      def test_one(self):
          obj = list(range(3))
          f = itemsgetter(1)
  
          self.assertTrue(callable(f))
          self.assertEqual(f(obj), (obj[1], ))
  
      def test_multi(self):
          obj = list(range(3))
          f = itemsgetter(0, 2)
  
          self.assertTrue(callable(f))
          self.assertEqual(f(obj), (obj[0], obj[2]))
  