MockHttpServletRequest servletRequest = tester.getRequest();
if (formComponent instanceof FileUploadField)
{
servletRequest.addFile(formComponent.getInputName(), file, contentType);
}
else if (formComponent instanceof MultiFileUploadField)
{
String inputName = formComponent.getInputName() + MultiFileUploadField.MAGIC_SEPARATOR + multiFileUploadIndex++;
servletRequest.addFile(inputName, file, contentType);