ClassNotFoundException in IDE when Java class is put in wrong package

[alisevych]

Description

If Java class is located in one package, but there is another package defined in the file - it's not compiled.
java.lang.ClassNotFoundException is thrown by UTBot in IDE

To Reproduce

1. Run a project in IntelliJ Idea 2022.1.4 / 2022.2.2
2. Install plugin one of the latest builds from main
   or install build from #1067
3. Put the the following class to 'org' package

package org.example;

public class Example {

    String name;

    public Example(String init) {
        this.name = init;
    }

    public String output(String newS) {
        String example = "Some text";

       return name + example + newS;
    }
}

Expected behavior

UTBot detects that class is not found and shows some meaningful error. Test generation should not start.

Actual behavior

ClassNotFoundException is thrown from UnitTestBot in IDEA.

Visual proofs (screenshots, logs, images)

java.lang.ClassNotFoundException in main branch

java.util.concurrent.ExecutionException: java.lang.ClassNotFoundException: org.utbot.examples.algorithms.org$utbot$examples$Diagonal at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395) at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2022) at org.jetbrains.concurrency.AsyncPromise.get(AsyncPromise.kt:44) at org.jetbrains.concurrency.AsyncPromise.blockingGet(AsyncPromise.kt:111) at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.executeSynchronously(NonBlockingReadActionImpl.java:435) at com.intellij.openapi.application.impl.NonBlockingReadActionImpl.executeSynchronously(NonBlockingReadActionImpl.java:186) at org.utbot.intellij.plugin.generator.UtTestsDialogProcessor$createTests$1$1.run(UtTestsDialogProcessor.kt:180) at com.intellij.openapi.progress.impl.CoreProgressManager.startTask(CoreProgressManager.java:442) at com.intellij.openapi.progress.impl.ProgressManagerImpl.startTask(ProgressManagerImpl.java:114) at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcessWithProgressAsynchronously$5(CoreProgressManager.java:493) at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$3(ProgressRunner.java:244) at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:189) at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:608) at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:683) at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:639) at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:607) at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:60) at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:176) at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$4(ProgressRunner.java:244) at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668) at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665) at java.base/java.lang.Thread.run(Thread.java:829) Caused by: java.lang.ClassNotFoundException: org.utbot.examples.algorithms.org$utbot$examples$Diagonal at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:476) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) at org.utbot.intellij.plugin.generator.UtTestsDialogProcessor$createTests$1$1$run$1.call(UtTestsDialogProcessor.kt:163) at org.utbot.intellij.plugin.generator.UtTestsDialogProcessor$createTests$1$1$run$1.call(UtTestsDialogProcessor.kt:161) at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.insideReadAction(NonBlockingReadActionImpl.java:536) at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$attemptComputation$3(NonBlockingReadActionImpl.java:501) at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1152) at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runInReadActionWithWriteActionPriority$0(ProgressIndicatorUtils.java:75) at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runActionAndCancelBeforeWrite(ProgressIndicatorUtils.java:158) at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runWithWriteActionPriority$1(ProgressIndicatorUtils.java:115) at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:58) at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:189) at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:608) at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:683) at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:639) at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:607) at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:60) at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:176) at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:58) at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runWithWriteActionPriority(ProgressIndicatorUtils.java:112) at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runInReadActionWithWriteActionPriority(ProgressIndicatorUtils.java:75) at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.attemptComputation(NonBlockingReadActionImpl.java:501) at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.executeSynchronously(NonBlockingReadActionImpl.java:428) ... 22 more

java.lang.ClassNotFoundException in RD branch

java.util.concurrent.ExecutionException: com.jetbrains.rd.util.reactive.RdFault: org.example$StringConcatenationExample, reason: java.lang.ClassNotFoundException: org.example$StringConcatenationExample at java.net.URLClassLoader.findClass(URLClassLoader.java:387) at java.lang.ClassLoader.loadClass(ClassLoader.java:418) at java.lang.ClassLoader.loadClass(ClassLoader.java:351) at org.utbot.framework.process.EngineMainKt$setup$6.invoke(EngineMain.kt:156) at org.utbot.framework.process.EngineMainKt$setup$6.invoke(EngineMain.kt:155) at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$2$1$1.invoke(ClientProcessUtil.kt:79) at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$1.invokeSuspend(ClientProcessUtil.kt:69) at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106) at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284) at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85) at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59) at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source) at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38) at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source) at org.utbot.rd.CallsSynchronizer.measureExecutionForTermination(ClientProcessUtil.kt:66) at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$2$1.invokeSuspend(ClientProcessUtil.kt:78) at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106) at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284) at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85) at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59) at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source) at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38) at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source) at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$2.invoke(ClientProcessUtil.kt:77) at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182) at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182) at com.jetbrains.rd.framework.impl.RdCall.onWireReceived(RdTask.kt:360) at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:57) at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:56) at com.jetbrains.rd.framework.impl.ProtocolContexts.readMessageContextAndInvoke(ProtocolContexts.kt:148) at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:56) at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:54) at com.jetbrains.rd.util.threading.SingleThreadSchedulerBase.queue$lambda-3(SingleThreadScheduler.kt:41) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:750)

at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2096)
at org.jetbrains.concurrency.AsyncPromise.get(AsyncPromise.kt:44)
at org.jetbrains.concurrency.AsyncPromise.blockingGet(AsyncPromise.kt:111)
at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.executeSynchronously(NonBlockingReadActionImpl.java:435)
at com.intellij.openapi.application.impl.NonBlockingReadActionImpl.executeSynchronously(NonBlockingReadActionImpl.java:186)
at org.utbot.intellij.plugin.generator.UtTestsDialogProcessor$createTests$1$1.run(UtTestsDialogProcessor.kt:174)
at com.intellij.openapi.progress.impl.CoreProgressManager.startTask(CoreProgressManager.java:442)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.startTask(ProgressManagerImpl.java:114)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcessWithProgressAsynchronously$5(CoreProgressManager.java:493)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$3(ProgressRunner.java:252)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:188)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:608)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:683)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:639)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:607)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:60)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:175)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$4(ProgressRunner.java:252)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:702)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:699)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:699)
at java.base/java.lang.Thread.run(Thread.java:833)

Caused by: com.jetbrains.rd.util.reactive.RdFault: org.example$StringConcatenationExample, reason: java.lang.ClassNotFoundException: org.example$StringConcatenationExample
at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at org.utbot.framework.process.EngineMainKt$setup$6.invoke(EngineMain.kt:156)
at org.utbot.framework.process.EngineMainKt$setup$6.invoke(EngineMain.kt:155)
at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$2$1$1.invoke(ClientProcessUtil.kt:79)
at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$1.invokeSuspend(ClientProcessUtil.kt:69)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284)
at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59)
at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38)
at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
at org.utbot.rd.CallsSynchronizer.measureExecutionForTermination(ClientProcessUtil.kt:66)
at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$2$1.invokeSuspend(ClientProcessUtil.kt:78)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284)
at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59)
at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38)
at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$2.invoke(ClientProcessUtil.kt:77)
at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182)
at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182)
at com.jetbrains.rd.framework.impl.RdCall.onWireReceived(RdTask.kt:360)
at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:57)
at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:56)
at com.jetbrains.rd.framework.impl.ProtocolContexts.readMessageContextAndInvoke(ProtocolContexts.kt:148)
at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:56)
at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:54)
at com.jetbrains.rd.util.threading.SingleThreadSchedulerBase.queue$lambda-3(SingleThreadScheduler.kt:41)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750)

at com.jetbrains.rd.framework.RdTaskResult$Companion.read(TaskInterfaces.kt:30)
at com.jetbrains.rd.framework.impl.CallSiteWiredRdTask.onWireReceived(RdTask.kt:104)
at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:57)
at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:56)
at com.jetbrains.rd.framework.impl.ProtocolContexts.readMessageContextAndInvoke(ProtocolContexts.kt:148)
at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:56)
at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:54)
at com.jetbrains.rd.framework.impl.RdCall$createResponseScheduler$1.queue$execute(RdTask.kt:278)
at com.jetbrains.rd.framework.impl.RdCall$createResponseScheduler$1.access$queue$execute(RdTask.kt:267)
at com.jetbrains.rd.framework.impl.RdCall$createResponseScheduler$1$queue$1.invokeSuspend(RdTask.kt:287)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284)
at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59)
at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38)
at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
at org.utbot.intellij.plugin.process.EngineProcess.obtainClassId(EngineProcess.kt:194)
at org.utbot.intellij.plugin.generator.UtTestsDialogProcessor$createTests$1$1$run$1$2.call(UtTestsDialogProcessor.kt:158)
at org.utbot.intellij.plugin.generator.UtTestsDialogProcessor$createTests$1$1$run$1$2.call(UtTestsDialogProcessor.kt:156)
at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.insideReadAction(NonBlockingReadActionImpl.java:536)
at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$attemptComputation$3(NonBlockingReadActionImpl.java:501)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1154)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runInReadActionWithWriteActionPriority$0(ProgressIndicatorUtils.java:75)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runActionAndCancelBeforeWrite(ProgressIndicatorUtils.java:158)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runWithWriteActionPriority$1(ProgressIndicatorUtils.java:115)
at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:66)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:188)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:608)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:683)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:639)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:607)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:60)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:175)
at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:66)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runWithWriteActionPriority(ProgressIndicatorUtils.java:112)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runInReadActionWithWriteActionPriority(ProgressIndicatorUtils.java:75)
at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.attemptComputation(NonBlockingReadActionImpl.java:501)
at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.executeSynchronously(NonBlockingReadActionImpl.java:428)
... 22 more

Environment

WIndows 10 Pro
IntelliJ IDEA 2022.1.4 - in main
Reproducing in IDEA 2022.2.2 - with plugin from #1067

Additional context

Originally posted by @alisevych in #1068 (comment)

[alisevych]

Additional context

As discussed with @volivan239 the same exception is thrown when Java class is not compiled.
First the correct error is shown in Build Output : that the code was not compiled.
But then there comes out the exception in IDE from UnitTestBot: ClassNotFoundException.

Expected behavior

Skip test generation for a class is it's not found.

@denis-fokin Do you agree with the expected behavior for a non-compiling code?

[denis-fokin]

We have to detect such warnings and ask the user to relocate the file in the appropriate folder or rename the package.