Add test for #2395

Author: nicolasstucki

compiler/test/dotty/tools/dotc/MissingCoreLibTests.scala

@@ -0,0 +1,34 @@
+package dotty
+package tools
+package dotc
+
+import org.junit.{ Test, AfterClass }
+
+import vulpix.{ ParallelTesting, SummaryReport, SummaryReporting, TestConfiguration }
+
+import scala.concurrent.duration._
+
+class MissingCoreLibTests extends ParallelTesting {
+  import MissingCoreLibTests._
+  import TestConfiguration._
+
+  // Test suite configuration --------------------------------------------------
+
+  def maxDuration = 30.seconds
+  def numberOfSlaves = 5
+  def safeMode = Properties.testsSafeMode
+  def isInteractive = SummaryReport.isInteractive
+  def testFilter = Properties.testsFilter
+
+  @Test def missingDottyLib: Unit = {
+    val classPath = mkClassPath(Jars.dottyCompiler :: Jars.dottyInterfaces :: Jars.dottyExtras) // missing Jars.dottyLib
+    val options = noCheckOptions ++ checkOptions ++ yCheckOptions ++ classPath
+    compileFile("../tests/neg/nolib/Foo.scala", options).checkExpectedErrors()
+  }
+
+}
+
+object MissingCoreLibTests {
+  implicit val summaryReport: SummaryReporting = new SummaryReport
+  @AfterClass def cleanup(): Unit = summaryReport.echoSummary()
+}

compiler/test/dotty/tools/vulpix/TestConfiguration.scala

@@ -23,8 +23,10 @@ object TestConfiguration {
     "-Yforce-sbt-phases"
   )
 
-  val classPath = {
-    val paths = Jars.dottyTestDeps map { p =>
+  val classPath = mkClassPath(Jars.dottyTestDeps)
+
+  def mkClassPath(deps: List[String]) = {
+    val paths = deps map { p =>
       val file = new java.io.File(p)
       assert(
         file.exists,
@@ -50,7 +52,7 @@ object TestConfiguration {
     Array("-classpath", paths)
   }
 
-  private val yCheckOptions = Array("-Ycheck:tailrec,resolveSuper,erasure,mixin,getClass,restoreScopes,labelDef")
+  val yCheckOptions = Array("-Ycheck:tailrec,resolveSuper,erasure,mixin,getClass,restoreScopes,labelDef")
 
   val defaultUnoptimised = noCheckOptions ++ checkOptions ++ yCheckOptions ++ classPath
   val defaultOptimised = defaultUnoptimised :+ "-optimise"

tests/neg/nolib/Foo.scala

@@ -0,0 +1,2 @@
+// nopos-error
+class Foo