- If a watch with the `progressNotify` option set is to be created, and the registry hasn't provided a `newFunc`, return an error. ([#120212](https://github.com/kubernetes/kubernetes/pull/120212), [@p0lyn0mial](https://github.com/p0lyn0mial)) [SIG API Machinery]

        when(dr.getPathConsumed()).thenReturn(2); // consume leading \\ from UNC

        String newUnc = l.handleDFSReferral(dr, "\\req\\");
        // dunc is "\\" + path + remaining  - note: path may not have leading backslashes
        assertTrue(newUnc.contains("dfs/path") || newUnc.contains("dfs\\path"));
        assertEquals(dr, l.getDfsReferral());
        assertEquals("dfs-server", l.getServerWithDfs());