android-PowerMock Robolectric Dagger2.第一部分
作者：互联网
这个问题是从PowerMock + Robolectric + Dagger2的第一部分创建的
所以我又有点.抱歉.
我测试自定义视图类,其中包含：
> android ui元素
>一些逻辑
>静态方法调用
> dagger2依赖
所以我用下一个工具进行测试
> Robolectric用于UI元素模拟
>用于逻辑测试的单元测试
> PowerMock用于静态方法模拟
Robolectric PowerMock集成问题已知,解决方案已知-https://github.com/robolectric/robolectric/wiki/Using-PowerMock
但是使用此解决方案,dagger2依赖关系失败.
注意代码
我的自定义视图-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);
}
}
应用程序SIP：
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);
...
}
}
因此,当我开始测试时,我得到下一个异常：
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robolectric活动的初始放置：
@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);
...
}
}
我得到另一个例外：
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)
解决方法:
在回答您的问题之前.我会说：
>您的观点做得太多/知道太多.我正在谈论FileDownloaderManager的知识和有关如何获取依赖项的知识
>由于您正在使用注入,因此我会将静态函数包装到一个类中并进行注入.编写/维护测试会容易得多
>甚至类AppComponent的名称都说它不应该知道如何注入视图.考虑一下范围注射
>一些带有applicationContext的未成年人.为什么它是易失性的,您是否希望从非主线程访问它？为什么已经需要ApplicationSIP和应用程序转换？
终于得到答案了.第一个堆栈跟踪表明appContext为null.因此未调用您的应用程序的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.
标签：powermockito,unit-testing,dagger-2,robolectric,android 来源： https://codeday.me/bug/20191119/2034280.html