old_contents: import matplotlib
  import fishbowl
  
  
  original = []
  updated = [r'\usepackage{mathspec}',
             r'\setallmainfonts(Digits,Latin,Greek){Arbitrary}']
  
  
  def test_context_set():
      fishbowl.reset_style()
      with fishbowl.style(axes='minimal', palette='gourami', font='Arbitrary'):
          assert matplotlib.rcParams['pgf.preamble'] == updated
  
  
  def test_context_reset():
      fishbowl.reset_style()
      with fishbowl.style(axes='minimal', palette='gourami', font='Arbitrary'):
          pass
      assert matplotlib.rcParams['pgf.preamble'] == original
  
  
  def test_set():
      fishbowl.reset_style()
      fishbowl.set_style(font='Arbitrary')
      assert matplotlib.rcParams['pgf.preamble'] == updated
  
  
  def test_reset():
      fishbowl.set_style(font='Arbitrary')
      fishbowl.reset_style()
      assert matplotlib.rcParams['pgf.preamble'] == original
  
new_contents: import matplotlib
  import fishbowl
  
  
  original = True
  updated = False
  
  
  def test_context_set():
      fishbowl.reset_style()
      with fishbowl.style(axes='minimal', palette='gourami', font='Arbitrary'):
          assert matplotlib.rcParams['axes.spines.left'] == updated
  
  
  def test_context_reset():
      fishbowl.reset_style()
      with fishbowl.style(axes='minimal', palette='gourami', font='Arbitrary'):
          pass
      assert matplotlib.rcParams['axes.spines.left'] == original
  
  
  def test_set():
      fishbowl.reset_style()
      fishbowl.set_style(font='Arbitrary')
      assert matplotlib.rcParams['axes.spines.left'] == updated
  
  
  def test_reset():
      fishbowl.set_style(font='Arbitrary')
      fishbowl.reset_style()
      assert matplotlib.rcParams['axes.spines.left'] == original
  
subject: Update tests to remove pgf.preamble