Test for Enumeration support (#3411)

airframe-surface/src/main/scala-3/wvlet/airframe/surface/CompileTimeSurfaceFactory.scala

@@ -863,19 +863,24 @@ private[surface] class CompileTimeSurfaceFactory[Q <: Quotes](using quotes: Q):
           name != "<init>"
         }
 
-    allMethods.filter(m => isOwnedByTargetClass(m, t))
+    allMethods.filter(m => isOwnedByTargetClass(m, t) && !enumerationWorkaround(m, t))
 
   private def nonObject(x: Symbol): Boolean =
     !x.flags.is(Flags.Synthetic) &&
       !x.flags.is(Flags.Artifact) &&
       x.fullName != "scala.Any" &&
       x.fullName != "java.lang.Object" &&
-      // Exclude caes class methods
+      // Exclude case class methods
       x.fullName != "scala.Product"
 
   private def isOwnedByTargetClass(m: Symbol, t: TypeRepr): Boolean =
     m.owner == t.typeSymbol || t.baseClasses.filter(nonObject).exists(_ == m.owner)
 
+  // workaround https://github.com/lampepfl/dotty/issues/19825 - surface of enumeration value methods fails
+  private def enumerationWorkaround(m: Symbol, t: TypeRepr): Boolean =
+    t.baseClasses.exists(_.fullName.startsWith("scala.Enumeration.")) // this will match both Value and ValueSet
+    // note: it would be possible to let id, hashCode and equals pass through if desired
+
   private def modifierBitMaskOf(m: Symbol): Int =
     var mod = 0
 

airframe-surface/src/test/scala/wvlet/airframe/surface/i3411.scala

@@ -0,0 +1,36 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package wvlet.airframe.surface
+
+import wvlet.airspec.AirSpec
+
+object i3411 extends AirSpec {
+
+  object SomeEnum extends Enumeration {
+    type SomeEnum = Value
+
+    val A, B, C = Value
+  }
+
+  import SomeEnum.SomeEnum
+
+  test("Handle a Scala 2 enumeration") {
+    val s = Surface.of[SomeEnum] // just check there is no error - no expected properties
+    val m = Surface.methodsOf[SomeEnum]
+    debug(s.params)
+    // enumeration type (value) usually contains at least the compare method
+    // note: we are unable to handle compare at the moment and some other methods inherited from Value, see https://github.com/lampepfl/dotty/issues/19825
+    // m.map(_.name) shouldContain "compare"
+  }
+}