old_contents: # Copyright 2020 Google LLC
  #
  # 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
  #
  #     https://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.
  
  """Unittests for scan method."""
  
  import unittest
  
  import jax.numpy as jn
  
  import objax
  
  
  class TestScan(unittest.TestCase):
      def test_scan(self):
          def cell(carry, x):
              return jn.array([2]) * carry * x, jn.array([2]) * carry * x
  
          carry = jn.array([8., 8.])
          output = jn.array([[2., 2.], [4., 4.], [8., 8.]])
          test_carry, test_output = objax.functional.scan(cell, jn.ones((2,)), jn.ones((3,)))
          self.assertTrue(jn.array_equal(carry, test_carry))
          self.assertTrue(jn.array_equal(output, test_output))
  
new_contents: # Copyright 2020 Google LLC
  #
  # 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
  #
  #     https://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.
  
  """Unittests for scan method."""
  
  import unittest
  
  import jax.numpy as jn
  
  import objax
  
  
  class TestScan(unittest.TestCase):
      def test_scan(self):
          def cell(carry, x):
              return jn.array([2]) * carry * x, jn.array([3]) * carry * x
  
          carry = jn.array([8., 8.])
          output = jn.array([[3., 3.], [6., 6.], [12., 12.]])
          test_carry, test_output = objax.functional.scan(cell, jn.ones((2,)), jn.ones((3,)))
          self.assertTrue(jn.array_equal(carry, test_carry))
          self.assertTrue(jn.array_equal(output, test_output))
  
subject: Return different values for carry and output.