text: import matplotlib.gridspec as gridspec
  import pytest
  
  
  def test_equal():
      gs = gridspec.GridSpec(2, 1)
      assert gs[0, 0] == gs[0, 0]
      assert gs[:, 0] == gs[:, 0]
  
  
  def test_width_ratios():
      """
      Addresses issue #5835.
      See at https://github.com/matplotlib/matplotlib/issues/5835.
      """
      with pytest.raises(ValueError):
          gridspec.GridSpec(1, 1, width_ratios=[2, 1, 3])
  
  
  def test_height_ratios():
      """
      Addresses issue #5835.
      See at https://github.com/matplotlib/matplotlib/issues/5835.
      """
      with pytest.raises(ValueError):
          gridspec.GridSpec(1, 1, height_ratios=[2, 1, 3])
  
  
  def test_repr():
      ss = gridspec.GridSpec(2, 2,
                             height_ratios=(3, 1),
                             width_ratios=(1, 3))
      assert repr(ss) == \
          "GridSpec(2, 2, height_ratios=(3, 1), width_ratios=(1, 3))"
  