android - Robolectric 不使用 ShadowWebView 作为扩展 WebView 的类的父类(super class)。 MustOverrideException 代替

Question

我试图让 Robolectric 2.1 与我的项目一起工作，并在我的 WebView 子类尝试在其 WebSettings 上调用 setDatabasePath 时收到 MustOverrideException。我有一个自定义应用程序类，它试图在 onCreate 中创建 WebView 子类的实例。作为 WebView 构造函数的一部分，它尝试设置数据库路径。

我本以为，由于 getSettings 是从 WebView 调用的，所以该调用会真正命中 ShadowWebView，它应该返回一个不会抛出这些异常的 TestWebSettings 对象。相反，它似乎只是调用普通的 WebSettings.getSettings 并返回未实现这些方法的内容。我尝试使用 @Config(shadows = ShadowWebView.class) 进行测试，但没有任何改变。我试图为我的专用 Web View 创建自定义阴影并将其应用于测试，但它仍然调用常规自定义类。这是我在尝试运行测试时看到的异常:

java.lang.RuntimeException: android.webkit.MustOverrideException: abstract function called: must be overriden!
    at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:231)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:177)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:80)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:47)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:69)
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.messaging.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
    at org.gradle.messaging.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
    at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:103)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.messaging.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:355)
    at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:66)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
    at java.lang.Thread.run(Thread.java:680)
Caused by: android.webkit.MustOverrideException: abstract function called: must be overriden!
    at android.webkit.WebSettings.setDatabasePath(WebSettings.java:932)
    at com.example.android.jsbridge.ExWebView.init(ExWebView.java:237)
    at com.example.android.jsbridge.ExWebView.<init>(ExWebView.java:187)
    at com.example.android.jsbridge.ExWebView.getInstance(ExWebView.java:192)
    at com.example.android.ExApplication.onCreate(ExApplication.java:88)
    at org.robolectric.internal.ParallelUniverse.setUpApplicationState(ParallelUniverse.java:146)
    at org.robolectric.RobolectricTestRunner.setUpApplicationState(RobolectricTestRunner.java:387)
    at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:227)

Answer 1

我喜欢 Jearil 的回答，但不必等待新版本更好。我扩展了 ShadowWebView 和 TestWebSettings 以添加未实现的方法。

ExtendedShadowWebView.java

@Implements(value = WebView.class, inheritImplementationMethods = true)
public class ExtendedShadowWebView extends ShadowWebView{
private WebSettings webSettings = new ExtendedTestWebSettings();
  @Implementation
  public WebSettings getSettings() {
    return webSettings;
  }
}

ExtendedTestWebSettings.java

public class ExtendedTestWebSettings extends TestWebSettings {
      @Implementation
      public void setDefaultFontSize(int fontSize) {
           // This was the method I needed, replace with your setDatabasePath
      }
}

MyActivityTest.java

@RunWith(RobolectricTestRunner.class)
@Config(manifest = TestUtility.ANDROID_MANIFEST_XML,shadows=ExtendedShadowWebView.class)
public class MyActivityTest {