java - Mockito/Spring MVC -(注解驱动)请求映射动态验证

Question

我目前正在编写一个基于 Spring MVC 的 webapp。

我不想为每个带注释的方法编写一个测试，而是希望从 Parameterized JUnit runner 中受益。

最后，我几乎可以正常工作，尽管我必须在我的 Controller 方法中将所有原始参数更改为它们的包装对应物(然后手动对空引用进行完整性检查)。

如果它可以帮助，这里是代码(这也取决于 Guava ):

@RunWith(Parameterized.class)
public class MyControllerMappingTest {

    private MockHttpServletRequest request;
    private MockHttpServletResponse response;
    private MyController mockedController;
    private AnnotationMethodHandlerAdapter annotationHandlerAdapter;
    private final String httpMethod;
    private final String uri;
    private final String controllerMethod;
    private final Class<?>[] parameterTypes;
    private final Object[] parameterValues;

    @Before
    public void setup() {
        request = new MockHttpServletRequest();
        response = new MockHttpServletResponse();
        mockedController = mock(MyController.class);
        annotationHandlerAdapter = new AnnotationMethodHandlerAdapter();
    }

    @Parameters
    public static Collection<Object[]> requestMappings() {
        return asList(new Object[][] {
                {"GET", "/my/uri/0", "index", arguments(new MethodArgument(Integer.class, 0))}
        });
    }

    private static List<MethodArgument> arguments(MethodArgument... arguments) {
        return asList(arguments);
    }

    public MyControllerMappingTest(String httpMethod, String uri, String controllerMethod, List<MethodArgument> additionalParameters) {
        this.httpMethod = httpMethod;
        this.uri = uri;
        this.controllerMethod = controllerMethod;
        this.parameterTypes = new Class<?>[additionalParameters.size()];
        initializeParameterTypes(additionalParameters);
        this.parameterValues = newArrayList(transform(additionalParameters, valueExtractor())).toArray();
}

    private void initializeParameterTypes(List<MethodArgument> additionalParameters) {
        Iterable<Class<?>> classes = transform(additionalParameters, typeExtractor());
        int i = 0;
        for (Class<?> parameterClass : classes) {
            parameterTypes[i++] = parameterClass;
        }
    }

    @Test
    public void when_matching_mapping_constraints_then_controller_method_automatically_called() throws Exception {
        request.setMethod(httpMethod);
        request.setRequestURI(uri);
        annotationHandlerAdapter.handle(request, response, mockedController);

        Method method = MyController.class.getMethod(controllerMethod, parameterTypes);
        method.invoke(verify(mockedController), parameterValues);
    }
}

使用以下自定义类 MethodArgument:

public class MethodArgument {
    private final Class<?> type;
    private final Object value;

    public MethodArgument(final Class<?> type, final Object value) {
        this.type = type;
        this.value = value;
    }

    public Object getValue() {
        return value;
    }

    public Class<?> getType() {
        return type;
    }

    public static Function<MethodArgument, Class<?>> typeExtractor() {
        return new Function<MethodArgument, Class<?>>() {
            @Override
            public Class<?> apply(MethodArgument argument) {
                return argument.getType();
            }
        };
    }

    public static Function<MethodArgument, Object> valueExtractor() {
        return new Function<MethodArgument, Object>() {
            @Override
            public Object apply(MethodArgument argument) {
                return argument.getValue();
            }
        };
    }
}

所以，我快到了，这里唯一的测试用例因为 Java Integer 缓存而有效，因此 Integer 实例在整个调用链中都是相同的......但是这不适用于自定义对象，我总是以一个 InvocationTargetException (原因:“参数不同!”)...

类型是正确的，但传递的实例与 @Parameters 方法中设置的实例不同。

知道如何解决这个问题吗？

Answer 1

稍安毋躁!

SpringSource 正在烘焙一个 spring-test-mvc 模块:
https://github.com/SpringSource/spring-test-mvc