java - 进行 Junit 测试时，如何在 AEM Sling 模型中的节点对象中 setProperty()？

Question

我尝试在单元测试中的节点类中设置属性，但无法这样做。如果您以前碰巧这样做过，我想寻求您的帮助，分享您在 AEM Sling MOdel 中设置节点属性以进行单元测试的知识。谢谢!

实现如下:

@Model(adaptables = SlingHttpServletRequest.class)
public class SlingModelClass {

    @Inject
    private SomeService someService;
    private boolean isShowCaptcha;

    @SlingObject
    private Resource resource;

    private Node node;

    @PostConstruct
    public void setup() {
        node = resource.adaptTo(Node.class);
        isShowCaptcha = someService.isCaptchaHide();
        hideShowTitle(!isShowCaptcha);       <= Test unable to get through this method
    }

    public boolean getIsShowCaptcha() {
        return this.isShowCaptcha;
    }

    public PropertyIterator getPropertiesItems() throws RepositoryException {
        return this.node.getProperties();
    }

    private void hideShowTitle(boolean flag) {
        try {
            node.setProperty("hideTitle", flag);     <= I am getting a null pointer exception at this line
            if(flag) {
                node.setProperty("guideNodeClass", "");
            } else {
                node.setProperty("guideNodeClass", "guideCaptcha");
            }
            node.getSession().save();

        } catch (RepositoryException e) {
            e.printStackTrace();
        }
    }
}

我编写的单元测试:

public class SlingModelClassTest {

    @Rule
    public final AemContext context = new AemContext();

    @Mock
    private SomeService someService = mock(SomeService .class);

    @Mock
    Resource resource;

    // injects all the mocks into the tested object.
    @InjectMocks
    private SlingModelClass slingModelClass;

    private Node node;

    private static String PATH = "/content/testproject/en/page/sub-page";

    @Before
    public void setUp() {
        context.addModelsForPackage("de.com.adsl.sightly.model");
        context.load().json("/components/textrte.json", PATH);
        context.currentPage(PATH);
        resource = mock(Resource.class);
    }

    @Test
    public void testSetup() {

        context.registerService(SomeService.class, someService);

        slingModelClass.setup();
    }

错误如下:

java.lang.NullPointerException
    at de.com.adsl.sightly.model.SlingModelClassTest.aaa(SlingModelClassTest.java:85)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:305)
    at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:365)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:330)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:78)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:328)
    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:65)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:292)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:305)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:412)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

Answer 1

这是错误的模式。 Sling 模型不应不改变 JCR 节点。当每次实例化 Sling 模型时，它都会在存储库上执行写入操作，您可能会遇到大麻烦。 Sling 模型应该从 JCR 读取。

如果您需要一些全局标志，请使用页面属性和继承来读取该标志并在必要时覆盖它。这样，配置就以受控的方式完成，您只需在必要时编写属性。

只是为了完成我的答案，正如 @OliverGebert 所建议的:Sling API 应该用于处理存储库数据/作为抽象层。 JCR API 被认为级别太低，而 AEM 基本上构建在 Sling 之上。此外，您还需要管理 Sling 以及 JCR 依赖项，这在长期项目中可能是一个很大的麻烦。