Merge pull request #712 from SethTisue/using-2.13.17

update `Using` from Scala 2.13.17 and add `UsingTest`

Author: SethTisue

.github/workflows/ci.yml

@@ -10,22 +10,19 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [8, 11, 17]
-        scala: [2.11.x, 2.12.x, 2.13.x, 3.x]
+        java: [8, 25]
+        scala: [2.12.x, 2.13.x, 3.x]
+        scala-js: [""]
         platform: [JVM, JS, Native]
         mode: [normal]
-        exclude:
-          - java: 11
-            platform: JS
-          - java: 11
-            platform: Native
-          - java: 17
-            platform: JS
-          - java: 17
-            platform: Native
-          - scala: 2.11.x
-            platform: Native
         include:
+          - java: 8
+            scala: 2.11.x
+            platform: JVM
+          - java: 8
+            scala: 2.11.x
+            platform: JS
+            scala-js: 1.12.0
           - java: 8
             scala: 2.12.x
             mode: testScalafix
@@ -42,18 +39,11 @@ jobs:
             scala: 2.12.x
             mode: headerCheck
             platform: JVM
-          - java: 11
-            scala: 2.12.x
-            mode: normal
-            platform: JVM
-          - java: 17
-            scala: 2.12.x
-            mode: normal
-            platform: JVM
     runs-on: ubuntu-latest
     env:
       CI_JDK: ${{matrix.java}}
       CI_SCALA_VERSION: ${{matrix.scala}}
+      CI_SCALAJS_VERSION: ${{matrix.scala-js}}
       CI_MODE: ${{matrix.mode}}
       CI_PLATFORM: ${{matrix.platform}}
     steps:

build.sbt

@@ -50,8 +50,8 @@ lazy val root = project
 lazy val junit = libraryDependencies += "com.github.sbt" % "junit-interface" % "0.13.3" % Test
 
 lazy val scala211 = "2.11.12"
-lazy val scala212 = "2.12.19"
-lazy val scala213 = "2.13.13"
+lazy val scala212 = "2.12.20"
+lazy val scala213 = "2.13.17"
 lazy val scala3 = "3.3.6"
 
 lazy val compat = new MultiScalaCrossProject(
@@ -63,6 +63,16 @@ lazy val compat = new MultiScalaCrossProject(
       moduleName := "scala-collection-compat",
       scalaModuleAutomaticModuleName := Some("scala.collection.compat"),
       scalacOptions ++= Seq("-feature", "-language:higherKinds", "-language:implicitConversions"),
+      // we need to force Scala 3 to use the latest Scala 2 stdlib, otherwise
+      // we might get test failures if there are behavior changes in latest Scala 2 stdlib
+      dependencyOverrides ++= {
+        CrossVersion.partialVersion(scalaVersion.value) match {
+          case Some((3, _)) =>
+            Seq("org.scala-lang" % "scala-library" % scala213)
+          case _ =>
+            Seq()
+        }
+      },
       Compile / unmanagedSourceDirectories += {
         val sharedSourceDir = (ThisBuild / baseDirectory).value / "compat/src/main"
         CrossVersion.partialVersion(scalaVersion.value) match {
@@ -359,6 +369,7 @@ inThisBuild {
         else {
           List(
             "CI_SCALA_VERSION",
+            "CI_SCALAJS_VERSION",
             "CI_PLATFORM",
             "CI_MODE",
             "CI_JDK",