private void testDoesNotAddHeaderToRequestIfNotPresent(String header) throws Exception {
BasicHttpEntityEnclosingRequest req =
new BasicHttpEntityEnclosingRequest("POST","/",HttpVersion.HTTP_1_1);
req.setEntity(HttpTestUtils.makeBody(128));
req.setHeader("Content-Length","128");
req.removeHeaders(header);
Capture<HttpRequest> cap = new Capture<HttpRequest>();
EasyMock.expect(mockBackend.execute(EasyMock.eq(host),
EasyMock.capture(cap),