How to PUT multipart/form-data using Spring MockMvc?

Yes, there is a way, and it’s simple too!

I ran into the same problem myself. Though I was discouraged by Sam Brannen’s answer, it appears that Spring MVC nowadays DOES support PUT file uploading as I could simply do such a request using Postman (I’m using Spring Boot 1.4.2). So, I kept digging and found that the only problem is the fact that the MockMultipartHttpServletRequestBuilder returned by MockMvcRequestBuilders.fileUpload() has the method hardcoded to “POST”. Then I discovered the with() method…

and that allowed me to come up with this neat little trick to force the MockMultipartHttpServletRequestBuilder to use the “PUT” method anyway:

    MockMultipartFile file = new MockMultipartFile("data", "dummy.csv",
            "text/plain", "Some dataset...".getBytes());

    MockMultipartHttpServletRequestBuilder builder =
            MockMvcRequestBuilders.multipart("/test1/datasets/set1");
    builder.with(new RequestPostProcessor() {
        @Override
        public MockHttpServletRequest postProcessRequest(MockHttpServletRequest request) {
            request.setMethod("PUT");
            return request;
        }
    });
    mvc.perform(builder
            .file(file))
            .andExpect(status().isOk());

 
Works like a charm!