Add sbt test for scala2-library-cc-tasty

Author: Linyxus

project/Build.scala

@@ -1920,6 +1920,7 @@ object Build {
         (`scala3-compiler-bootstrapped` / publishLocalBin),
         (`scala3-library-bootstrapped` / publishLocalBin),
         (`scala2-library-tasty` / publishLocal),
+        (`scala2-library-cc-tasty` / publishLocal),
         (`scala3-library-bootstrappedJS` / publishLocalBin),
         (`tasty-core-bootstrapped` / publishLocalBin),
         (`scala3-staging` / publishLocalBin),

sbt-test/sbt-dotty/scala2-library-cc-tasty/build.sbt

@@ -0,0 +1,4 @@
+scalaVersion := sys.props("plugin.scalaVersion")
+
+libraryDependencies += "org.scala-lang" %% "scala2-library-cc-tasty-experimental" % scalaVersion.value
+scalacOptions += "-Yscala2-unpickler:never" // check that we do not load symbol from the Scala 2 library classfiles (use TASTy)

sbt-test/sbt-dotty/scala2-library-cc-tasty/src/main/scala/hello/Hello.scala

@@ -0,0 +1,4 @@
+package hello
+
+@main def hello: Unit =
+  println(Some("Hello world!")) // load Some form the Scala 2 library TASTy

sbt-test/sbt-dotty/scala2-library-cc-tasty/test

@@ -0,0 +1 @@
+> run