assertNotNull(responseData.getLastModified());
        assertTrue(responseData.getLastModified().getTime() < new Date().getTime());
        assertNull(responseData.getResponseBody());
    }

    public void test_doHead_dir() throws Exception {
        final File file = ResourceUtil.getResourceAsFile("test");
        String path = file.getAbsolutePath();
        if (!path.startsWith("/")) {
            path = "/" + path.replace('\\', '/');