test_loop.py 文件源码

def test_inner_get_dev_fails(self):
        tempdir = self.useFixture(fixtures.TempDir()).path
        l = loop.LoopMount(self.file, tempdir)
        self.useFixture(fixtures.MonkeyPatch('nova.utils.trycmd',
                                             _fake_trycmd_losetup_fails))

        # No error logged, device consumed
        self.assertFalse(l._inner_get_dev())
        self.assertFalse(l.linked)
        self.assertNotEqual('', l.error)
        self.assertIsNone(l.device)

        # Free
        l.unget_dev()
        self.assertFalse(l.linked)
        self.assertIsNone(l.device)