old_contents: from __future__ import with_statement
  
  import pytest
  
  from fanstatic import get_library_registry, Library, NeededResources
  
  def test_library_registry():
      # Skip this test if the test fixtures has not been installed.
      pytest.importorskip('mypackage')
  
      library_registry = get_library_registry()
      # the 'foo' library has been placed here by the test buildout
      # fixtures/MyPackage by the entry point mechanism
      assert library_registry.keys() == ['foo']
  
      # this is a real library, not an entry point
      assert isinstance(library_registry['foo'], Library)
  
      with pytest.raises(KeyError):
          library_registry['bar']
  
      bar = Library('bar', '')
      library_registry.add(bar)
      assert library_registry['bar'] is bar
      assert library_registry.keys() == ['foo', 'bar']
  
      baz = Library('baz', '')
      library_registry[baz.name] = baz
      assert library_registry['baz'] is baz
      assert sorted(library_registry.keys()) == ['bar', 'baz', 'foo']
  
      # 'MyPackage has been installed in development mode:
      assert library_registry['foo'].version == None
      from mypackage import foo
      needed = NeededResources(base_url='', versioning=True)
      assert needed.library_url(foo) == \
          '/fanstatic/foo/:version:86b2eb561ee8798f4c816bbe6529f083'
  
  
new_contents: from __future__ import with_statement
  
  import pytest
  
  from fanstatic import get_library_registry, Library, NeededResources
  
  def test_library_registry():
      # Skip this test if the test fixtures has not been installed.
      pytest.importorskip('mypackage')
  
      library_registry = get_library_registry()
      # the 'foo' library has been placed here by the test buildout
      # fixtures/MyPackage by the entry point mechanism
      assert library_registry.keys() == ['foo']
  
      # this is a real library, not an entry point
      assert isinstance(library_registry['foo'], Library)
  
      with pytest.raises(KeyError):
          library_registry['bar']
  
      bar = Library('bar', '')
      library_registry.add(bar)
      assert library_registry['bar'] is bar
      assert library_registry.keys() == ['foo', 'bar']
  
      baz = Library('baz', '')
      library_registry[baz.name] = baz
      assert library_registry['baz'] is baz
      assert sorted(library_registry.keys()) == ['bar', 'baz', 'foo']
  
      # MyPackage has been installed in development mode:
      assert library_registry['foo'].version == None
  
  
subject: Remove brittle test.