text: # Copyright 2021 The Layout Parser team. 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.
  
  import cv2
  import pytest
  from layoutparser import PaddleDetectionLayoutModel
  
  def test_only_effdet_model():
  
      # When all the backeds are not installed, it should 
      # elicit only ImportErrors
      
      config = "lp://PubLayNet/ppyolov2_r50vd_dcn_365e/config"
      model = PaddleDetectionLayoutModel(config)
      image = cv2.imread("tests/fixtures/model/test_model_image.jpg")
      layout = model.detect(image)
      
      with pytest.raises(ImportError):
          from layoutparser import EfficientDetLayoutModel
          from layoutparser import Detectron2LayoutModel