def sibling(self, path):
        l = self.pathList()
        l[-1] = path
        return self._pathMod(l, self.queryList(0))
Test to verify that the npm cache is cleaned.
dataset/ETHPy150Open twisted/nevow/nevow/url.py/URL.sibling--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/states/npm_test.py/NpmTestCase.test_cache_cleaned