old_contents: # -*- coding: utf-8 -*-
  # Copyright (c) 2015, Vispy Development Team.
  # Distributed under the (new) BSD License. See LICENSE.txt for more info.
  """Tests for Vispy's IPython bindings"""
  
  # from vispy import IPython
  from numpy.testing import assert_equal
  from vispy.testing import requires_ipython
  
  
  @requires_ipython(2.0)
  def test_webgl_loading():
      """Test if the vispy.ipython extension loads the webGL backend
      on IPython 3.0 and greater.
  
      Test if it fails to load the webGL backend for IPython versions
      less that 3.0"""
  
      import IPython
      from distutils.version import LooseVersion
      from IPython.testing.globalipapp import get_ipython
  
      ipy = get_ipython()
      ipy.run_cell("from vispy import app")
  
      if LooseVersion(IPython.__version__) >= LooseVersion("3.0.0"):
          ipy.run_cell("%load_ext vispy.ipython")
          ipy.run_cell("backend_name = app.use_app().backend_name")
          # make sure that the webgl backend got loaded
          assert_equal(ipy.user_ns["backend_name"], "ipynb_webgl")
      else:
          ipy.run_cell("%load_ext vispy.ipython")
          # HACK: duplicate code branches for now to see what happens.
          ipy.run_cell("backend_name = app.use_app().backend_name")
          # make sure that the webgl backend got loaded
          assert_equal(ipy.user_ns["backend_name"], "ipynb_webgl")
  
new_contents: # -*- coding: utf-8 -*-
  # Copyright (c) 2015, Vispy Development Team.
  # Distributed under the (new) BSD License. See LICENSE.txt for more info.
  """Tests for Vispy's IPython bindings"""
  
  # from vispy import IPython
  from numpy.testing import assert_equal, assert_raises
  from vispy.testing import requires_ipython
  
  
  @requires_ipython(2.0)
  def test_webgl_loading():
      """Test if the vispy.ipython extension loads the webGL backend
      on IPython 3.0 and greater.
  
      Test if it fails to load the webGL backend for IPython versions
      less that 3.0"""
  
      import IPython
      from distutils.version import LooseVersion
      from IPython.testing.globalipapp import get_ipython
  
      ipy = get_ipython()
      ipy.run_cell("from vispy import app")
  
      if LooseVersion(IPython.__version__) >= LooseVersion("3.0.0"):
          ipy.run_cell("%load_ext vispy.ipython")
          ipy.run_cell("backend_name = app.use_app().backend_name")
          # make sure that the webgl backend got loaded
          assert_equal(ipy.user_ns["backend_name"], "ipynb_webgl")
      else:
          ipy.run_cell("%load_ext vispy.ipython")
          ipy.run_cell("backend_name = app.use_app().backend_name")
          # the above call should have failed, and thus the key
          # backend_name should not exist in the namespace
          assert_raises(KeyError, ipy.user_ns["backend_name"])
  
subject: use correct testcase for failing branch