add tests to generated Scala2 code

scala2/build.sbt

@@ -11,32 +11,14 @@ crossScalaVersions := List(scala212, scala213)
 
 resolvers += Resolver.sonatypeRepo("snapshots")
 
-lazy val catsVersion = "2.10.0"
-lazy val catsMtlVersion = "1.3.1"
-lazy val scalaTestPlusVersion = "3.1.0.0-RC2"
-lazy val scalacheckVersion = "1.17.0"
+lazy val zioVersion = "2.0.22"
+
 libraryDependencies ++= Seq(
-  // cats
-  "org.typelevel" %% "cats-core" % catsVersion,
-  "org.typelevel" %% "cats-effect" % "2.5.4",
-
-  "io.monix" %% "monix" % "3.4.1",
-
-  // Scalaz
-  "org.scalaz"    %% "scalaz-core" % "7.3.7",
-
-  // ZIO
-  "dev.zio" %% "zio" % "2.0.18",
-  "dev.zio" %% "zio-prelude"  % "1.0.0-RC8",
-
-  // algebra
-  "org.typelevel" %% "algebra" % "2.10.0",
-
-  // test
-  "org.scalacheck" %% "scalacheck" % scalacheckVersion % Test,
-  "org.scalatestplus" %% "scalatestplus-scalacheck" % scalaTestPlusVersion % Test,
-  "com.github.alexarchambault" %% "scalacheck-shapeless_1.15" % "1.3.0" % Test,
-  "org.scalatest" %% "scalatest" % "3.2.17" % Test,
+  "dev.zio" %% "zio" % zioVersion,
+  "dev.zio" %% "zio-test" % zioVersion % Test,
+  "dev.zio" %% "zio-test-sbt" % zioVersion % Test,
+  "dev.zio" %% "zio-test-junit" % zioVersion % Test,
+  "dev.zio" %% "zio-test-magnolia" % zioVersion % Test
 )
 
 scalacOptions ++= Seq(

scala2/src/main/scala/examples/adts.scala

@@ -1,3 +1,5 @@
+package examples
+
 object adts {
 
 sealed trait Rgb
@@ -13,5 +15,5 @@ final case class RgbPair(snd: Bool, fst: Rgb)
 
 def idRgb(theArg: Rgb): Rgb = theArg
 
-def and0(rgbArg: Rgb, rgbPairArg: RgbPair): RgbPair = rgbPairArg
+def constRgbPair(rgbArg: Rgb, rgbPairArg: RgbPair): RgbPair = rgbPairArg
 }

scala2/src/test/scala/examples/RgbSpec.scala

@@ -0,0 +1,25 @@
+package examples
+
+import zio.test.Assertion.equalTo
+import zio.test.junit.JUnitRunnableSpec
+import zio.test.{ assert, suite, test }
+
+import examples.adts.{ Rgb, Red, Green, Blue, idRgb }
+import examples.adts.{ RgbPair, constRgbPair }
+import examples.adts.{ Bool, True, False }
+
+object RgbSpec extends JUnitRunnableSpec {
+
+  def spec = suite("Test Rgb")(
+    test("identity on Rgb") {
+      assert(idRgb(Red))(equalTo(Red))
+      assert(idRgb(Green))(equalTo(Green))
+      assert(idRgb(Blue))(equalTo(Blue))
+    },
+    test("const on RgbPair") {
+      assert(constRgbPair(Red, RgbPair(True, Blue)))(equalTo(RgbPair(True, Blue)))
+      assert(constRgbPair(Green, RgbPair(False, Red)))(equalTo(RgbPair(False, Red)))
+      assert(constRgbPair(Blue, RgbPair(True, Blue)))(equalTo(RgbPair(True, Blue)))
+    }
+  )
+}