java - 单元测试resteasy时未注入(inject)@Context对象

Question

我正在尝试注册一个 @Provider，它将 Locale 对象注入(inject)到 @Context 中，以便我可以在我的 REST 资源中重用它。

关注文章http://bill.burkecentral.com/2011/03/09/adding-objects-that-are-context-injectable/我设法让提供商运行

@Provider
public class LocaleProvider implements ContainerRequestFilter {

    public static final String DEFAULT_LANGUAGE_CODE_VALUE = "en-US";

    @Context
    Dispatcher dispatcher;

    @Override
    public void filter(ContainerRequestContext containerRequestContext) throws IOException {
        List<Locale> acceptableLanguages = containerRequestContext.getAcceptableLanguages();
        if (acceptableLanguages == null || acceptableLanguages.isEmpty()) {
(A)         dispatcher.getDefaultContextObjects().put(Locale.class, new Locale(DEFAULT_LANGUAGE_CODE_VALUE));
            return;
        }

        dispatcher.getDefaultContextObjects().put(Locale.class, acceptableLanguages.get(0));
    }


}

然后像这样使用它

@Path("/")
public class Resource {

    @GET
    public String get(@Context Locale locale) {
        if (locale == null) {
            return "null";
        }

        return locale.getLanguage();
    }
}

到目前为止，代码在部署到 Tomcat 时运行良好。但是当我尝试对其进行单元测试时，我遇到了问题。我有

public class LocaleProviderTest {
    private Dispatcher dispatcher = MockDispatcherFactory.createDispatcher();

    {
        dispatcher.getRegistry().addResourceFactory(new POJOResourceFactory(Resource.class));
    }

    @Test
    public void shouldHaveDefaultLocaleWhenNoAcceptLanguageHeader() throws URISyntaxException {
        dispatcher.getProviderFactory().registerProvider(LocaleProvider.class);

        MockHttpRequest request = MockHttpRequest.get("/");
        MockHttpResponse response = new MockHttpResponse();
        dispatcher.invoke(request, response);

        assertEquals("en", response.getContentAsString());
    }
}

如果我调试它，即使 LocaleProvider 执行 (A) 行，Resource 也会返回 null。

知道为什么 @Context 注入(inject)在单元测试时不起作用吗？

Answer 1

我找到了一个基于 this answer 的解决方案.

在我的 LocaleProvider 而不是

 dispatcher.getDefaultContextObjects().put(Locale.class, locale);

我需要使用

 ResteasyProviderFactory.pushContext(Locale.class, locale);

希望对大家有帮助:)