如何使用MockMVC对Spring-Boot REST端点进行单元测试，其中路径映射是环境变量？

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

@RunWith(SpringRunner.class)
@SpringBootTest
public class MyRestControllerTest {
    // 测试代码
}

@Autowired
private MockMvc mockMvc;

@Test
public void testGetUser() throws Exception {
    mockMvc.perform(get("/users/{id}", 1))
            .andExpect(status().isOk())
            .andExpect(jsonPath("$.name", is("John")))
            .andExpect(jsonPath("$.age", is(30)));
}

@Test
public void testGetUser() throws Exception {
    // 设置环境变量
    System.setProperty("myapp.baseurl", "/api");
    
    mockMvc.perform(get("${myapp.baseurl}/users/{id}", 1))
            .andExpect(status().isOk())
            .andExpect(jsonPath("$.name", is("John")))
            .andExpect(jsonPath("$.age", is(30)));
}