new_contents: # Copyright 2019 Novo Nordisk Foundation Center for Biosustainability, DTU.
  #
  # 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.
  
  from cameo.flux_analysis.analysis import phenotypic_phase_plane
  from cameo.visualization.plotting.with_plotly import PlotlyPlotter
  
  plotter = PlotlyPlotter()
  
  
  def test_ppp_plotly(model):
      """Test if at least it doesn't raise an exception."""
      production_envelope = phenotypic_phase_plane(
          model,
          variables=[model.reactions.Biomass_Ecoli_core_N_lp_w_fsh_GAM_rp__Nmet2],
          objective=model.metabolites.succ_e,
      )
      # pass a grid argument so that it doesn't open a browser tab
      production_envelope.plot(plotter, height=400, grid=[])
  
subject: check that production envelop is not broken