Snippet

Integration Testing with MockMvc

MockMvc provides a way to test the web layer without starting a full HTTP server. It allows you to simulate requests and verify responses, including status codes, JSON content, and headers.

snippet.java

java

@SpringBootTest
@AutoConfigureMockMvc
class UserControllerTest {
    @Autowired
    private MockMvc mockMvc;
 
    @Test
    void shouldReturnUser() throws Exception {
        mockMvc.perform(get("/api/users/1"))
               .andExpect(status().isOk())
               .andExpect(jsonPath("$.username").value("john_doe"))
               .andExpect(header().exists("Content-Type"));
    }
}

spring

Breakdown

@AutoConfigureMockMvc

Configures the MockMvc instance for use in the test class.

mockMvc.perform(get(...))

Simulates an HTTP GET request to the specified endpoint.

jsonPath("$.username")

An expression used to inspect the JSON body of the response.

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Integration Testing with MockMvc

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