Mockmvc unit testing with String[] as request body

Question

I'm trying to create a unit test for the PUT api, as seen below, with a String[] as the request body.

@RequestMapping(value = "/test/id", method = RequestMethod.PUT)
public ResponseEntity<?> updateStatus(@RequestBody String[] IdList,.........){
}

and my test is shown below

@Test
public void updateStatus() throws Exception {
    when(serviceFactory.getService()).thenReturn(service);        
    mockMvc.perform(put(baseUrl + "/test/id)
        .param("IdList",new String[]{"1"}))
        .andExpect(status().isOk());

}

The test is failing with this exception:

java.lang.AssertionError: Status expected:<200> but was:<400>

What could be the best way to pass a string array param from mockmvc?

Answer 1

You are putting your String[] in param. You sohuld put it in body. You can put it like that(I am assuming you are using json. If you use xml you can change it accordingly):

ObjectMapper mapper =  new ObjectMapper();
String requestJson = mapper.writeValueAsString(new String[]{"1"});
mockMvc.perform(put(baseUrl + "/test/id)
                    .contentType(MediaType.APPLICATION_JSON_UTF8).content(requestJson)
                    .andExpect(status().isOk())
                    .andExpect(jsonPath("$.[0]", is("1")));

jsonPath is org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath