old_contents: import pytest
  from spectrum_overload import Spectrum
  
  from mingle.utilities.spectrum_utils import load_spectrum
  
  
  @pytest.mark.xfail
  def test_load_spectrum():
      load_spectrum()
      assert False
      assert isinstance(results, Spectrum)
  
  
  @pytest.mark.xfail
  def test_load_spectrum_with_failure():
      assert False
  
  
  @pytest.mark.xfail
  def test_select_observation():
      assert False
  
  
  @pytest.mark.xfail
  def test_spectrum_plotter(spectra, label=None, show=False):
      """Plot a Spectrum object."""
      assert False
  
  
  @pytest.mark.xfail
  def test_plot_spectra(obs, model):
      """Plot two spectra."""
      assert False
  
  
new_contents: import pytest
  from spectrum_overload import Spectrum
  
  from mingle.utilities.spectrum_utils import load_spectrum
  
  
  @pytest.mark.xfail
  def test_load_spectrum():
      load_spectrum()
      assert False
      assert isinstance(results, Spectrum)
  
  
  @pytest.mark.xfail
  def test_load_spectrum_with_failure():
      assert False
  
  
  @pytest.mark.xfail
  def test_select_observation():
      assert False
  
  from mingle.utilities.spectrum_utils import select_observation
  @pytest.mark.parametrize("chip", [0, None, 5, 42])
  def test_select_observation_with_bad_chip(chip):
      with pytest.raises(ValueError):
          select_observation("HD30501", "1", chip)
  
  @pytest.mark.xfail
  def test_spectrum_plotter(spectra, label=None, show=False):
      """Plot a Spectrum object."""
      assert False
  
  
  @pytest.mark.xfail
  def test_plot_spectra(obs, model):
      """Plot two spectra."""
      assert False
  
  
subject: test select observation with bad chip number