'If the resource is newer than the if-modified-since date in the request
header, L{http.Request.setLastModified} returns None'

def test_setLastModifiedNotCached(self):

    req = http.Request(DummyChannel(), False)
    req.requestHeaders.setRawHeaders(networkString('if-modified-since'), ['01    Jan    1970    00:00:00    GMT'])
    result = req.setLastModified(1000000)
    self.assertEqual(result, None)
