'If the plugin name is that of a pre-configured plugin, the
corresponding builtin plugin is returned.'

def test_builtin_backend(self):

    loader = DUMMY_LOADER.set('builtin_plugins', [DummyDescription(name=u'other-builtin'), DummyDescription(name=u'builtin')])
    plugin = loader.get('builtin')
    self.assertEqual(plugin, DummyDescription(name=u'builtin'))
