'Any reference to I{zope.interface} which is not in the inter sphinx
database returns L{None}.'

def test_getLinkZopeNonExistent(self):

    sut = self.getInventoryWithZope()
    result = sut.getLink('zope.interface.Interface')
    self.assertIsNone(result)
    result = sut.getLink('zope.interface.NoSuchReference')
    self.assertIsNone(result)
