    @Test(expected = HttpMessageNotReadableException.class)
    public void shouldThrowHttpMessageNotReadableExceptionOnNoConverterFoundForDtoType() throws Exception {

        // given
        when(converter.canRead(PersistentEntityResource.class, contentType)).thenReturn(false);
        // when
        mappingManager.merge(contentType, inputMessage, invoker, id, dtoParam);
        // then
    }