restTest.java

this.mockMvc.perform(post("/alerts")
                .contentType(MediaType.APPLICATION_JSON_VALUE)
                .content(mapper.writeValueAsString(request)))
                .andDo(print())
                .andExpect(status().isCreated())
                .andExpect(jsonPath("$.success").value(true))
                .andExpect(jsonPath("$.narrative").value("CLOSE ALERT WITH ID 989898989"));