Mock creation does not work for JSch projects ChannelSftp class with Mockito 2.7.22

Hey,

We have project with Scala and use ScalaTest for testing Framework and Mockito for mocking.

After upgrading to 2.7.22 (tested with all 2.x branches - including using tag v2.8.28), only one class cannot be mocked anymore.

import com.jcraft.jsch.ChannelSftp

val mockChannelSftp: ChannelSftp = mock(classOf[ChannelSftp])

Exception:

java.lang.IllegalAccessError: tried to access class com.jcraft.jsch.ChannelSession from class com.jcraft.jsch.ChannelSftp$MockitoMock$1916471588
	at com.jcraft.jsch.ChannelSftp$MockitoMock$1916471588.<clinit>(Unknown Source)
	at sun.reflect.GeneratedSerializationConstructorAccessor33.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.objenesis.instantiator.sun.SunReflectionFactoryInstantiator.newInstance(SunReflectionFactoryInstantiator.java:48)
	at org.objenesis.ObjenesisBase.newInstance(ObjenesisBase.java:73)
	at org.mockito.internal.creation.instance.ObjenesisInstantiator.newInstance(ObjenesisInstantiator.java:18)
	at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:47)
	at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:25)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:63)
	at org.mockito.Mockito.mock(Mockito.java:1729)
	at org.mockito.Mockito.mock(Mockito.java:1642)
	at ExampleSpec$$anonfun$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(ExampleSpec.scala:10)
	at ExampleSpec$$anonfun$1$$anonfun$apply$mcV$sp$1.apply(ExampleSpec.scala:9)
	at ExampleSpec$$anonfun$1$$anonfun$apply$mcV$sp$1.apply(ExampleSpec.scala:9)
	at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
	at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
	at org.scalatest.Transformer.apply(Transformer.scala:22)
	at org.scalatest.Transformer.apply(Transformer.scala:20)
	at org.scalatest.WordSpecLike$$anon$1.apply(WordSpecLike.scala:1078)
	at org.scalatest.TestSuite$class.withFixture(TestSuite.scala:196)
	at org.scalatest.WordSpec.withFixture(WordSpec.scala:1881)
	at org.scalatest.WordSpecLike$class.invokeWithFixture$1(WordSpecLike.scala:1075)
	at org.scalatest.WordSpecLike$$anonfun$runTest$1.apply(WordSpecLike.scala:1088)
	at org.scalatest.WordSpecLike$$anonfun$runTest$1.apply(WordSpecLike.scala:1088)
	at org.scalatest.SuperEngine.runTestImpl(Engine.scala:289)
	at org.scalatest.WordSpecLike$class.runTest(WordSpecLike.scala:1088)
	at org.scalatest.WordSpec.runTest(WordSpec.scala:1881)
	at org.scalatest.WordSpecLike$$anonfun$runTests$1.apply(WordSpecLike.scala:1147)
	at org.scalatest.WordSpecLike$$anonfun$runTests$1.apply(WordSpecLike.scala:1147)
	at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:396)
	at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:384)
	at scala.collection.immutable.List.foreach(List.scala:392)
	at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:384)
	at org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch(Engine.scala:373)
	at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:410)
	at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:384)
	at scala.collection.immutable.List.foreach(List.scala:392)
	at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:384)
	at org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch(Engine.scala:379)
	at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:461)
	at org.scalatest.WordSpecLike$class.runTests(WordSpecLike.scala:1147)
	at org.scalatest.WordSpec.runTests(WordSpec.scala:1881)
	at org.scalatest.Suite$class.run(Suite.scala:1147)
	at org.scalatest.WordSpec.org$scalatest$WordSpecLike$$super$run(WordSpec.scala:1881)
	at org.scalatest.WordSpecLike$$anonfun$run$1.apply(WordSpecLike.scala:1192)
	at org.scalatest.WordSpecLike$$anonfun$run$1.apply(WordSpecLike.scala:1192)
	at org.scalatest.SuperEngine.runImpl(Engine.scala:521)
	at org.scalatest.WordSpecLike$class.run(WordSpecLike.scala:1192)
	at org.scalatest.WordSpec.run(WordSpec.scala:1881)
	at org.scalatest.tools.Framework.org$scalatest$tools$Framework$$runSuite(Framework.scala:314)
	at org.scalatest.tools.Framework$ScalaTestTask.execute(Framework.scala:480)
	at sbt.TestRunner.runTest$1(TestFramework.scala:76)
	at sbt.TestRunner.run(TestFramework.scala:85)
	at sbt.TestFramework$$anon$2$$anonfun$$init$$1$$anonfun$apply$8.apply(TestFramework.scala:202)
	at sbt.TestFramework$$anon$2$$anonfun$$init$$1$$anonfun$apply$8.apply(TestFramework.scala:202)
	at sbt.TestFramework$.sbt$TestFramework$$withContextLoader(TestFramework.scala:185)
	at sbt.TestFramework$$anon$2$$anonfun$$init$$1.apply(TestFramework.scala:202)
	at sbt.TestFramework$$anon$2$$anonfun$$init$$1.apply(TestFramework.scala:202)
	at sbt.TestFunction.apply(TestFramework.scala:207)
	at sbt.Tests$$anonfun$9.apply(Tests.scala:216)
	at sbt.Tests$$anonfun$9.apply(Tests.scala:216)
	at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:44)
	at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:44)
	at sbt.std.Transform$$anon$4.work(System.scala:63)
	at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
	at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
	at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
	at sbt.Execute.work(Execute.scala:237)
	at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
	at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
	at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
	at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

Example failing project after upgrade (online line example with dependencies)

For running test you need SBT and run it with command sbt test

[pollycchang]

I ran into this exact issue. I can only get my test to work with Mockito 1.10. One interesting thing I noticed was that IntelliJ didn’t have a problem running my test with Mockito 2.7. The problem only appeared when I ran the test using sbt (0.13.8). Is there any fix for this issue?

[margussipria]

Hello,

After long time I tried to upgrade to our Mockito to 3.1.0 (nice jump from 1.10.19) and everything worked.

Then i did get back to my https://github.com/margussipria/mockito-bug project and started testing.

Mockito had fixed this problem at version 2.24.0, tried every version from 2.16.0 (last failing version tested 2 years ago) to 2.24.0.

But I also noticed something with failing version 2.16.0, it had stared working, and only thing I did previously was to switch to SBT version 1.3.2 just to get load time performance boost.

I also tested with different SBT versions using “failing” Mockito 2.16.0 and it worked with SBT 1.3.2 and 1.2.8, but failed with 1.1.6.

So independently to Mockito change, also SBT had fixed underlying cause as @trcooke had tested with Gradle? and it had worked.

I would say that this can be closed? just upgrade Mockito to 2.24.0+ and/or SBT to 1.2.8+.