Enable in scala port tests.

Author: viferga

source/ports/scala_port/build.sbt

@@ -1,3 +1,5 @@
+import Tests._
+
 lazy val commonSettings = Seq(
   name := "metacall",
   scalaVersion := "2.13.4",
@@ -53,8 +55,10 @@ lazy val root = (project in file("."))
   .settings(commonSettings: _*)
   .settings(
     name := "metacall",
-    parallelExecution in Test := false,
-    fork in (Test / run) := true,
+    fork in Test := true,
+    testGrouping in Test := (testGrouping in Test).value.flatMap { group =>
+      group.tests map (test => Group(test.name, Seq(test), SubProcess(ForkOptions())))
+    },
     dockerfile in docker := new Dockerfile {
       from("metacall/core:dev")
 

source/ports/scala_port/src/test/scala/CallerSpec.scala

@@ -12,6 +12,7 @@ class CallerSpecRunner {
 
 class CallerSpec extends AnyFlatSpec {
   "Caller" should "start successfully" in {
+    println(s"----------------------- MetaCall started in ${ProcessHandle.current().pid()} -----------------------")
     Caller.start()
   }
 

source/ports/scala_port/src/test/scala/MetaCallSpec.scala

@@ -19,6 +19,8 @@ class MetaCallSpec extends AnyFlatSpec {
   val metacall = Bindings.instance
 
   "MetaCall" should "initialize successfully" in {
+    println(s"----------------------- MetaCall started in ${ProcessHandle.current().pid()} -----------------------")
+
     // TODO: Remove this if we drop support for executing Scala outside of MetaCall
     // TODO: Create a destroy method wrapping this functionality
     if (System.getProperty("metacall.polyglot.name") != "core") {