PowerMock + Robolectric + Dagger2。第一部分 [英] PowerMock + Robolectric + Dagger2. Part I

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问题描述



这个问题是从 PowerMock + Robolectric + Dagger2 的第一部分创建的。 a>

所以我又有点。抱歉。


我测试了包含以下内容的自定义视图类：


This question was created from first part of PowerMock + Robolectric + Dagger2
So i'm a little bit again. Sorry.

I test custom view class which contain:


  1. android ui元素

  2. 一些逻辑

  3. 静态方法调用

  4. dagger2依赖项

  1. android ui elements
  2. some logic
  3. static methods callings
  4. dagger2 dependencies



所以我使用下一个工具进行测试


So i use next tools for testing


  1. Robolectric用于UI元素模拟

  2. 用于逻辑测试的单元测试

  3. 用于模拟
    的静态方法的PowerMock

Robolectric + PowerMock集成问题已知并且解决方案已知- https://github.com/robolectric/robolectric/wiki/Using-PowerMock

但是有了这个解决方案dagger2依赖项失败。




注意编码

我的自定义视图- ProgressTextView ：

Robolectric + PowerMock integration problem is known and solution is known - https://github.com/robolectric/robolectric/wiki/Using-PowerMock
But with this solution dagger2 dependencies fail.

Attention to code
My custom view - ProgressTextView: 

public class ProgressTextView extends TextView {

    private String defaultText;
    private int fileSize;
    private String fileSizeString;
    private FileDownloaderI fileDownloader;

    @Inject
    FileDownloaderManager fileDownloaderManager;

    Subscription downloadProgressChannelSubscription;
    Subscription downloadCancelChannelSubscription;

    public ProgressTextView(Context context) {
        super(context);
        provideDependency();
    }

    public ProgressTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        provideDependency();
    }

    public ProgressTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        provideDependency();
    }

    private void provideDependency() {
        ApplicationSIP.get().applicationComponent().inject(this);
    }

}

ApplicationSIP ：

public class ApplicationSIP extends Application {

    public static volatile Context applicationContext;

    @NonNull
    private AppComponent appComponent;

    @Override
    public void onCreate() {
        super.onCreate();
        applicationContext = getApplicationContext();
        Logger.registerLogger(this);

        appComponent = prepareApplicationComponent().build();
        appComponent.inject(this);
    }

    @NonNull
    protected DaggerAppComponent.Builder prepareApplicationComponent() {
        return DaggerAppComponent.builder()
                .appModule(new AppModule(getApplicationContext()))
                .tGModule(new TGModule());
    }

    @NonNull
    public AppComponent applicationComponent() {
        return appComponent;
    }

    @NonNull
    public static ApplicationSIP get() {
        return (ApplicationSIP) applicationContext.getApplicationContext();
    }

}

AppComponent ：

@Component(modules = {AppModule.class, TGModule.class, MediaModule.class, StaticModule.class})
@Singleton
public interface AppComponent {   
    void inject(ApplicationSIP applicationSIP);
    void inject(ProgressDownloadView progressDownloadView);
    void inject(ProgressTextView progressTextView);
}

和 ProgressTextViewTest ：

@RunWith(RobolectricUnitTestRunner.class)
@PowerMockIgnore({ "org.mockito.*", "org.robolectric.*", "android.*" })
@PrepareForTest(Formatter.class)
public class ProgressTextViewTest {

    @Rule
    public PowerMockRule rule = new PowerMockRule();
    Activity activity;

    @Before
    public void beforeTest() {
        // PowerMockito
        PowerMockito.mockStatic(Formatter.class);
        Mockito.when(Formatter.formatFileSize(anyObject(), anyInt())).thenReturn("");
        // Robolectic
        activity = Robolectric.setupActivity(Activity.class);
    }

    @Test
    public void init_FileDownloaded() {
        ProgressTextView progressTextView = new ProgressTextView(activity);
        ...
    }
}

所以当我开始时此测试我得到下一个异常：

So when i start this test i get next exception:

java.lang.NullPointerException
at com.tg.osip.ApplicationSIP.get(ApplicationSIP.java:64)
at com.tg.osip.ui.general.views.ProgressTextView.provideDependency(ProgressTextView.java:60)
at com.tg.osip.ui.general.views.ProgressTextView.<init>(ProgressTextView.java:46)
at com.tg.osip.ui.general.views.ProgressTextViewTest.init_FileDownloaded(ProgressTextViewTest.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.powermock.modules.junit4.rule.PowerMockStatement$1.run(PowerMockRule.java:52)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation(WhiteboxImpl.java:1873)
at org.powermock.reflect.internal.WhiteboxImpl.doInvokeMethod(WhiteboxImpl.java:773)
at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:638)
at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:401)
at org.powermock.classloading.ClassloaderExecutor.execute(ClassloaderExecutor.java:98)
at org.powermock.classloading.ClassloaderExecutor.execute(ClassloaderExecutor.java:78)
at org.powermock.modules.junit4.rule.PowerMockStatement.evaluate(PowerMockRule.java:49)
at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:251)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:188)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:54)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:152)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

如果您更改了机器人活动的初始放置：

If you change robolectric activity init placing:

@RunWith(RobolectricUnitTestRunner.class)
@PowerMockIgnore({ "org.mockito.*", "org.robolectric.*", "android.*" })
@PrepareForTest(Formatter.class)
public class ProgressTextViewTest {

    @Rule
    public PowerMockRule rule = new PowerMockRule();
    Activity activity = Robolectric.setupActivity(Activity.class);

    @Before
    public void beforeTest() {
        // PowerMockito
        PowerMockito.mockStatic(Formatter.class);
        Mockito.when(Formatter.formatFileSize(anyObject(), anyInt())).thenReturn("");
    }

    @Test
    public void init_FileDownloaded() {
        ProgressTextView progressTextView = new ProgressTextView(activity);
        ...
    }
}

我得到其他例外：

java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:3332)
at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:137)
at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:121)
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:569)
at java.lang.StringBuffer.append(StringBuffer.java:369)
at java.io.StringWriter.write(StringWriter.java:94)
at com.thoughtworks.xstream.core.util.QuickWriter.flush(QuickWriter.java:73)
at com.thoughtworks.xstream.io.xml.PrettyPrintWriter.flush(PrettyPrintWriter.java:342)
at com.thoughtworks.xstream.XStream.toXML(XStream.java:858)
at com.thoughtworks.xstream.XStream.toXML(XStream.java:843)
at org.powermock.classloading.DeepCloner.clone(DeepCloner.java:53)
at org.powermock.classloading.ClassloaderExecutor.execute(ClassloaderExecutor.java:89)
at org.powermock.classloading.ClassloaderExecutor.execute(ClassloaderExecutor.java:78)
at org.powermock.modules.junit4.rule.PowerMockStatement.evaluate(PowerMockRule.java:49)
at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:251)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:188)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:54)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:152)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)


推荐答案

在回答您的问题之前。我会说：

Before answering your question. I would say:


  1. 您的视图做的太多/知道的太多。我在谈论 FileDownloaderManager 的知识和关于如何获取依赖项的知识

  2. 由于您正在使用注入，因此我会包装静态函数上课并注入。编写/维护测试会容易得多

  3. 甚至类 AppComponent 的名称都说，它不应该知道如何注入视图。考虑一下范围内的注入

  4. 一些具有 applicationContext 的未成年人。为什么它是 volatile ，您是否希望从非主线程访问它？ ApplicationSIP 为什么您需要玩应用程序上下文和强制转换？

  1. Your view is doing/knowing too much. I'm talking about knowledge of FileDownloaderManager and knowledge about how to get dependencies
  2. Since you're using injection I would wrap static functions into a class and inject it. It will be much easier to write/maintain tests
  3. Even name of class AppComponent says that it should not know about how to inject a view. Think about scoped injections
  4. Some minors with applicationContext. Why it is volatile, do you expect it to be accessed from non-main thread? It is already ApplicationSIP why do you need play with application context and casting?

最后回答。第一个堆栈跟踪显示 appContext 为空。因此未调用您应用的 onCreate 。我没有看到 RobolectricUnitTestRunner 的代码，但我认为问题出在 PowerMock 的使用上。第二个堆栈跟踪那种证明。因此，我想说的答案是停止使用 PowerMock 。

Finally to the answer. The first stack trace says that the appContext is null. So onCreate of your app was not called. I don't see the code of RobolectricUnitTestRunner but I assume the problem is in the usage of the PowerMock. The second stack trace kind of proof for that. So I would say the answer is to stop usage of the PowerMock.

这篇关于PowerMock + Robolectric + Dagger2。第一部分的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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