UrlEncodedFormEntityWriter implements EntityWriter { public String getContentType(Request request) { return "application/x-www-form-urlencoded; charset=" + request.getMethodConfig().getCharset().displayName(); }  String getContentType(Request request); int getContentLength(Request request); void writeTo(Request request, OutputStream out);  }
@Test public void getContentTypeShouldReturnWWWFormEncodedWithRequestsCharset(){ assertEquals("application/x-www-form-urlencoded; charset=UTF-8", toTest.getContentType(mockRequest())); }