@Test
public void testController () throws Exception {
ResultMatcher ok = MockMvcResultMatchers.status().isOk();
MockMultipartFile file = new MockMultipartFile("user-file", "test.txt",
null, "test data".getBytes());
MockHttpServletRequestBuilder builder =
MockMvcRequestBuilders.fileUpload("/upload")
.file(file);
this.mockMvc.perform(builder).andExpect(ok);
}