Workaround scala/scala3#11630

Author: jodersky

cask/test/src-2/test/cask/VersionSpecific.scala

@@ -0,0 +1,11 @@
+package test.cask
+
+import scala.language.experimental.macros
+
+object VersionSpecific {
+
+  // See src-3/VersionSpecific for a comment on why we can't use
+  // `utest.compileError` directly in Scala 3.
+  def compileError(expr: String): utest.CompileError = macro utest.asserts.Asserts.compileError
+
+}

cask/test/src-3/test/cask/VersionSpecific.scala

@@ -0,0 +1,17 @@
+package test.cask
+
+import utest._
+
+object VersionSpecific {
+
+  // This is a workaround for https://github.com/lampepfl/dotty/issues/11630.
+  // The essence of the issue is that between Dotty 3.0.0-M3 and 3.0.0-RC1 the
+  // inliner and typer phases were decoupled. Since utest defines
+  // `compilerError` as `transparent` in order to propagate error position
+  // information, it no can no longer catch compilation errors resulting from
+  // inlines. However, since cask heavily uses macros, we need the old behavior
+  // to check for error cases. Hence, to work around the issue, we forward to
+  // utest, but this time without the `transparent` modifier.
+  inline def compileError(inline expr: String): utest.CompileError = utest.compileError(expr)
+
+}

cask/test/src/test/cask/FailureTests.scala

@@ -12,7 +12,7 @@ object FailureTests extends TestSuite {
 
   val tests = Tests{
     "mismatchedDecorators" - {
-      val m = utest.compileError("""
+      val m = VersionSpecific.compileError("""
         object Decorated extends cask.MainRoutes{
           @myDecorator
           @cask.websocket("/hello/:world")
@@ -24,7 +24,7 @@ object FailureTests extends TestSuite {
     }
 
     "noEndpoint" - {
-      utest.compileError("""
+      VersionSpecific.compileError("""
         object Decorated extends cask.MainRoutes{
           @cask.get("/hello/:world")
           @myDecorator()
@@ -36,7 +36,7 @@ object FailureTests extends TestSuite {
       }
 
     "tooManyEndpoint" - {
-      utest.compileError("""
+      VersionSpecific.compileError("""
         object Decorated extends cask.MainRoutes{
           @cask.get("/hello/:world")
           @cask.get("/hello/:world")