这是我试图从单元测试中调用的类
package bj.discogsbrowser.artistreleases
class ArtistResultFactory {
companion object {
@JvmStatic fun buildArtistResult(members: Int): ArtistResult {
val artistResult = ArtistResult()
artistResult.nameVariations = listOf("ye")
artistResult.dataQuality = "really good quality, we have the best qualities"
return artistResult
}
}
}
这就是测试的样子:
@Test
fun setArtistNoMembers_displaysNoMembers() {
controller.setArtist(ArtistResultFactory.buildArtistResult(0))
...
assertEquals(copyOfModels.size, 8)
}
Java 中的相同测试(也失败):
@Test
public void setArtistNoMembers_displaysNoMembers()
{
controller.setArtist(ArtistResultFactory.buildArtistResult(0));
...
assertEquals(copyOfModels.size(), 8);
}
在 Kotlin 和 Java 中我都得到了堆栈跟踪:
java.lang.NoClassDefFoundError: bj/discogsbrowser/artistreleases/ArtistResultFactory
at bj.discogsbrowser.artist.ArtistControllerTest.setArtistNoMembers_displaysNoMembers(ArtistControllerTest.java:70)
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$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.robolectric.RobolectricTestRunner$HelperTestRunner$1.evaluate(RobolectricTestRunner.java:488)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.robolectric.internal.SandboxTestRunner$2.evaluate(SandboxTestRunner.java:209)
at org.robolectric.internal.SandboxTestRunner.runChild(SandboxTestRunner.java:109)
at org.robolectric.internal.SandboxTestRunner.runChild(SandboxTestRunner.java:36)
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.internal.SandboxTestRunner$1.evaluate(SandboxTestRunner.java:63)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
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 com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)
Caused by: java.lang.ClassNotFoundException: bj.discogsbrowser.artistreleases.ArtistResultFactory
at org.robolectric.internal.bytecode.SandboxClassLoader.getByteCode(SandboxClassLoader.java:161)
at org.robolectric.internal.bytecode.SandboxClassLoader.maybeInstrumentClass(SandboxClassLoader.java:108)
at org.robolectric.internal.bytecode.SandboxClassLoader.findClass(SandboxClassLoader.java:101)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 32 more
我觉得这可能和我的sourceSets
有关。当我删除这些行时,代码将无法编译。
sourceSets {
test {
java.srcDirs += "$projectDir/src/testShared"
}
androidTest {
java.srcDirs += "$projectDir/src/testShared"
}
}
ArtistResultFactory
位于/src/testShared/
。当它是一个 Java 类时,测试运行良好。
我的应用程序build.gradle
包括
apply plugin: "kotlin-android"
apply plugin: 'kotlin-android-extensions'
在顶部。
最佳答案
您需要将其设为“对象”而不是“类”,以便在 Kotlin 中访问它的单例样式。
如果你确实让它成为一个对象(对于像工厂这样通常是单例的东西来说这是正确的做法),那么在Java中你我相信在访问该方法之前必须执行.getINSTANCE() (不确定是否可以将其设为静态),因为我不相信 Kotlin 中的对象上允许使用伴生对象(不过我可能会弄错)。
关于java - Kotlin:单元测试期间 @JvmStatic 方法 NoClassDefFoundError/ClassNotFoundException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44078095/