java - Getmethod Mokito java 模拟

Question

所以我尝试使用mockito来模拟getMethod请求/响应。但是我遇到了一些问题

@Mock
private HttpClient client;
private GetMethod method;

@InjectMocks
private WebserviceInterface webserviceInterface;

@Before
public void setUp() throws Exception {
    initMocks(this);
    setting up the a valid customer happens here

}


@Test
public void shouldReturnValidCustomerWithValidBarcode() throws Exception {
    // TODO: Mock out the ParcelService so that we can specify what JSON data is returned.
    // TODO: Create the Customer object that we expect
    // TODO: Call the method of module under test
    // TODO: assertThat(expected, is(theActualObject)

    when(client.executeMethod(any(HttpMethod.class))).thenReturn(200);

    String aValidCustomerJson = "JsonGoes Here";

    when(method.getResponseBodyAsString()).thenReturn(aValidCustomerJson);
   assertThat(webserviceInterface.parcelSearch("aValidBarcode"), is(aValidCustomer));


}

但是我得到了一个空指针异常，我不知道为什么:

java.lang.NullPointerException at com.springapp.mvc.WebserviceInterfaceTest.shouldReturnValidCustomerWithValidBarcode(WebserviceInterfaceTest.java:137)

如果有任何帮助，谢谢

Answer 1

一般来说，不建议模拟外部库，因为您的测试代码将依赖于它们。最好创建一个抽象层并模拟它。在这种情况下，您可以将 HttpClient 包装在一个类中，这样您就可以轻松地 stub 它的方法。