Sbt not resolving Scalatest on Intellij IDEA

Question

I know there are already answered questions about this, but they didn't work for me, maybe because they are too old now.

So I'm creating a scala project on Intellij IDEA Ultimate (SDK 16.0.1). I compile it using sbt. I created a MainTest class in src/test/scala with the following content :

import org.scalatest.funsuite.AnyFunSuite

class MainTest extends AnyFunSuite {
  test("Example") {
    assert(1 == 1)
  }
}

On my build.sbt file I have :

name := "my-scala-project"

version := "0.1"

scalaVersion := "3.0.0-M2"

libraryDependencies += "org.scalatest" %% "scalatest" % "1.4.RC2" % Test

I have also installed the library org.scalatest:scalatest_2.11:3.1.0 from Maven from the File > Project Structure... > Project Settings > Libraries window

On the editor I can see that Intellij is unable to resolve the import on my test file as it is marked in red. When I run sbt clean test, I get this error message :

[error] -- [E006] Not Found Error: path\to\project\src\test\scala\MainTest.scala:4:2
[error] 4 |  test("Example") {
[error]   |  ^^^^
[error]   |  Not found: test
[error] one error found
[error] one error found
[error] (Test / compileIncremental) Compilation failed

Why isn't it working ? I thought I have done everything as expected. Ideally I would like to use the latest 3.2.9 version of Scalatest.

Thanks

Answer 1

First of all, you have to change the scalaVersion to 3.0.0, which is the latest supported.

As far as dependencies are concerned, as Jarrod has mentioned, you could either use

"org.scalatest" %% "scalatest" % "3.2.10" % Test 

When using groupID %% artifactID % revision you are telling sbt to fetch the artifactID suited for the scala version you have provided, in this case, 3.0.0-M2.

You can also use groupID % artifactID % revision. Like in your question, if scalatest_2.11 is the artifactID, it means scalatest for scala version 2.11.x will be downloaded.

Answer 2

I combine all the help I got in the comment :

I had to write this in the build.sbt file :

name := "meteo-france-client"

version := "0.1"

scalaVersion := "3.0.0-M2"

libraryDependencies += "org.scalatest" %% "scalatest" % "3.3.0-SNAP3" % Test

Then sbt reload and sbt clean compile and it works. However I now get this exceptions :

[info] compiling 1 Scala source to C:\Users\adrie\OneDrive\Documents\dev\meteo-france-client\target\scala-3.0.0-M2\test-classes ...
[error] ## Exception when compiling 1 sources to C:\Users\adrie\OneDrive\Documents\dev\meteo-france-client\target\scala-3.0.0-M2\test-classes
[error] java.lang.NoClassDefFoundError: scala/collection/immutable/List
[error] xsbt.CachedCompilerImpl.run(CachedCompilerImpl.java:65)
[error] xsbt.CompilerInterface.run(CompilerInterface.java:41)
[error] java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
[error] java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] java.base/java.lang.reflect.Method.invoke(Method.java:567)
[error] sbt.internal.inc.AnalyzingCompiler.invoke(AnalyzingCompiler.scala:329)
[error] sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:112)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$7(MixedAnalyzingCompiler.scala:192)
[error] scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
[error] sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:247)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:182)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:163)
[error] sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:163)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:210)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:528)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:528)
[error] sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:175)
[error] sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:173)
[error] sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:459)
[error] sbt.internal.inc.IncrementalCommon$CycleState.next(IncrementalCommon.scala:116)
[error] sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:56)
[error] sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:52)
[error] sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:263)
[error] sbt.internal.inc.Incremental$.$anonfun$incrementalCompile$8(Incremental.scala:414)
[error] sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:501)
[error] sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:401)
[error] sbt.internal.inc.Incremental$.apply(Incremental.scala:167)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:528)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:482)
[error] sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:420)
[error] sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
[error] sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2357)
[error] sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2314)
[error] sbt.internal.io.Retry$.apply(Retry.scala:46)
[error] sbt.internal.io.Retry$.apply(Retry.scala:28)
[error] sbt.internal.io.Retry$.apply(Retry.scala:23)
[error] sbt.internal.server.BspCompileTask$.compute(BspCompileTask.scala:31)
[error] sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:2310)
[error] scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error] sbt.std.Transform$$anon$4.work(Transform.scala:68)
[error] sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] sbt.Execute.work(Execute.scala:291)
[error] sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error] java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
[error] java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
[error] java.base/java.lang.Thread.run(Thread.java:831)
[error]
[error] stack trace is suppressed; run 'last Test / compileIncremental' for the full output
[error] (Test / compileIncremental) java.lang.NoClassDefFoundError: scala/collection/immutable/List
[error] Total time: 0 s, completed 26 nov. 2021, 13:33:34

I'll make another post about it : Sbt unable to find List class definition on Scala 3.0.0-M2

Thanks for all who have helped me here

Answer 3

You need to do two things to fix your code:

1. Update build.sbt to use the correct dependency; and
2. Extend your test class with the necessary trait.

For 1:

Import the Scalatest library with the following:

libraryDependencies += "org.scalatest" %% "scalatest" % "3.2.10" % Test

When you use _2.11 in the current configuration you're asking SBT to find you version of scalatest for Scala 2.11, but you're using Scala 3.1.0. The %% is a helper to pull in the correct version of Scalatest for your Scala version.

For 2:

Change your file as per the documention to:

class MainTest extends AnyFunSuite {
  test("Example") {
    assert(1 == 1)
  }
}