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

CodePudding user response：

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)
  }
}

CodePudding user response：

First of all, you have to change the scalaVersion to 3.0.0-M2, which is the latest supported.

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

"org.scalatest" %% "scalatest" % "3.3.0-SNAP3" % 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.