   @Test
   public void testBuildOneForm() throws SecurityException, NoSuchMethodException {

      Invokable<?, ?> method = method(TestFormReplace.class, "oneForm", String.class);
      Object form = processor.apply(Invocation.create(method, ImmutableList.<Object> of("robot")))
            .getPayload().getRawContent();
      assertEquals(form, "x-amz-copy-source=/robot");
   }