java - Mockito servlet 测试 : cannot use response - it's not committed

Question

我已经对 servlet 进行了基本测试以测试它的响应状态代码，但它不起作用 - 它始终为 0，尽管我已将 servlet 中的响应状态代码设置为 200。

public class TestMyServlet extends Mockito {

@Test
public void test() throws Exception {
    HttpServletRequest request = mock(HttpServletRequest.class);
    HttpServletResponse response = mock(HttpServletResponse.class);

    when(request.getParameter("test")).thenReturn("1");

    new MyServlet().doPost(request, response);

    System.out.println(response.isCommited()); // false
    System.out.println(response.getContentType()); // null
    System.out.println(response.getStatus()); // 0
  }
}

如何让它发挥作用？

Answer 1

您想以不同的方式进行测试。您需要验证您的输入导致预期输出。对于非模拟结果，您可以断言该行为。因为您想验证您的输出设置是否正确。

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

public class MyServletTests {
    @Test
    public void testValidRequest() throws Exception {
        HttpServletRequest request = mock(HttpServletRequest.class);
        HttpServletResponse response = mock(HttpServletResponse.class);

        when(request.getParameter("test")).thenReturn("1");

        new MyServlet().doPost(request, response);

        // ensure that the request was used as expected
        verify(request).getParameter("test");

        // ensure that the response was setup as expected based on the
        //  mocked inputs
        verify(response).setContentType("text/html");
        verify(response).setStatus(200);
    }
 }

如果您希望某些输入不会被触及，那么您应该考虑使用 verify(response, never()).shouldNotBeCalledButSometimesIs() 来验证该行为(以验证条件何时控制它被调用/设置与不调用)。