@Test
  public void checkNewRequestHeader() throws ClientProtocolException, IOException, ODataException {
    final HttpGet get = new HttpGet(URI.create(getEndpoint().toString() + "/$metadata"));
    get.setHeader("ConTenT-laNguaGe", "de, en");
    getHttpClient().execute(get);

    final ODataContext ctx = getService().getProcessor().getContext();
    assertNotNull(ctx);

    assertEquals("de, en", ctx.getRequestHeader(HttpHeaders.CONTENT_LANGUAGE));
    assertNull(ctx.getRequestHeader("nonsens"));
  }