content: #  Copyright (c) ZenML GmbH 2023. 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:
  #
  #       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.
  
  
  from tests.unit.test_general import _test_materializer
  
  
  def test_langchain_document_materializer(clean_client):
      """Tests whether the steps work for the Langchain Document materializer."""
      from zenml.integrations.langchain.materializers.document_materializer import (
          LangchainDocumentMaterializer,
      )
  
      page_content = (
          "Axl, Aria and Blupus had a wonderful summer holiday together."
      )
      from langchain.docstore.document import Document
  
      langchain_document = _test_materializer(
          step_output=Document(page_content=page_content),
          materializer_class=LangchainDocumentMaterializer,
          expected_metadata_size=2,
      )
  
      assert langchain_document.page_content == page_content
  