Migrated scala-core to Scala 3

Author: yadavan88

build.sbt

@@ -25,10 +25,10 @@ val zioVersion = "2.0.19"
 lazy val scala_core = (project in file("scala-core-modules/scala-core"))
   .settings(
     name := "scala-core",
+    scalaVersion := scala3Version,
     libraryDependencies ++=
       Seq(
-        jUnitInterface,
-        catsEffect
+        jUnitInterface
       ) ++ scalaTestDeps
   )
 
@@ -62,6 +62,7 @@ lazy val scala2_core = (project in file("scala-core-modules/scala2-core"))
     libraryDependencies += "org.backuity.clist" %% "clist-macros" % "3.5.1" % "provided",
     libraryDependencies += "args4j" % "args4j" % "2.33",
     libraryDependencies += "org.scala-lang" % "scala-compiler" % scalaVersion.value % "test",
+    libraryDependencies += catsEffect
   )
 
 lazy val scala_core_4 = (project in file("scala-core-modules/scala-core-4"))

scala-core-modules/scala-core-2/src/test/scala/com/baeldung/scala/exceptionhandling/ExceptionHandlingUnitTest.scala

@@ -1,11 +1,6 @@
 package com.baeldung.scala.exceptionhandling
 
-import com.baeldung.scala.exceptionhandling.ExceptionHandling.{
-  DivideByZero,
-  divideWithEither,
-  divideWithOption,
-  divideWithTry
-}
+import com.baeldung.scala.exceptionhandling.ExceptionHandling._
 import org.scalatest.flatspec.AnyFlatSpec
 import org.scalatest.matchers.should.Matchers
 

scala-core-modules/scala-core/README.md

@@ -18,7 +18,7 @@ class Score(
 
   override def produce(): String = s"The score is produced by $engineer"
 
-  override def algorithm(): MixingAlgorithm = {
+  override def algorithm: MixingAlgorithm = {
     if (qualityRatio < 3) LowInstrumentalQuality
     else super.algorithm
   }

scala-core-modules/scala-core/src/main/scala-2/com/baeldung/scala/forloop/ForLoop.scala renamed to scala-core-modules/scala-core/src/main/scala/com/baeldung/scala/forloop/ForLoop.scala

@@ -46,7 +46,7 @@ class ScoreUnitTest {
     val studio = "Abbey Studios"
     val score = new Score(composer, engineer, orchestra, mixer, 1, studio)
 
-    assertEquals(score.algorithm().toString, "Low instrumental quality")
+    assertEquals(score.algorithm.toString, "Low instrumental quality")
   }
 
   @Test
@@ -59,7 +59,7 @@ class ScoreUnitTest {
     val studio = "Abbey Studios"
     val score = new Score(composer, engineer, orchestra, mixer, 10, studio)
 
-    assertEquals(score.algorithm().toString, "High instrumental quality")
+    assertEquals(score.algorithm.toString, "High instrumental quality")
   }
 
   @Test

scala-core-modules/scala-core/src/main/scala-2/com/baeldung/scala/higherorder/HigherOrderFunctions.scala renamed to scala-core-modules/scala-core/src/main/scala/com/baeldung/scala/higherorder/HigherOrderFunctions.scala

@@ -1,10 +1,6 @@
 package com.baeldung.scala.exceptionhandling
 
-import com.baeldung.scala.exceptionhandling.LegacyErrors.{
-  ResourceNotFound,
-  ServerError,
-  UserNotFound
-}
+import com.baeldung.scala.exceptionhandling.LegacyErrors._
 
 import scala.util.{Failure, Success, Try}
 

scala-core-modules/scala-core/src/main/scala-2/com/baeldung/scala/lazyval/LazyVal.scala renamed to scala-core-modules/scala-core/src/main/scala/com/baeldung/scala/lazyval/LazyVal.scala

@@ -3,11 +3,7 @@ package com.baeldung.scala.exceptionhandling
 import cats.MonadError
 import cats.syntax.flatMap._
 import cats.syntax.functor._
-import com.baeldung.scala.exceptionhandling.LegacyErrors.{
-  ResourceNotFound,
-  ServerError,
-  UserNotFound
-}
+import com.baeldung.scala.exceptionhandling.LegacyErrors._
 
 import scala.util.{Failure, Success, Try}
 

scala-core-modules/scala-core/src/main/scala-2/com/baeldung/scala/partialfunctions/SquareRoot.scala renamed to scala-core-modules/scala-core/src/main/scala/com/baeldung/scala/partialfunctions/SquareRoot.scala

@@ -3,10 +3,7 @@ package com.baeldung.scala.exceptionhandling
 import cats.data.ValidatedNel
 import cats.syntax.apply._
 import cats.syntax.validated._
-import com.baeldung.scala.exceptionhandling.ValidationErrors.{
-  IllegalLogin,
-  IllegalPassword
-}
+import com.baeldung.scala.exceptionhandling.ValidationErrors._
 
 object HandlingWithValidated {
   type InvalidOr[T] = ValidatedNel[ValidationErrors, T]

scala-core-modules/scala-core/src/main/scala-2/com/baeldung/scala/partialfunctions/SwapIntegerSign.scala renamed to scala-core-modules/scala-core/src/main/scala/com/baeldung/scala/partialfunctions/SwapIntegerSign.scala

@@ -2,15 +2,8 @@ package com.baeldung.scala.exceptionhandling
 
 import cats.data.NonEmptyList
 import cats.data.Validated.{Invalid, Valid}
-import com.baeldung.scala.exceptionhandling.LegacyErrors.{
-  ResourceNotFound,
-  ServerError,
-  UserNotFound
-}
-import com.baeldung.scala.exceptionhandling.ValidationErrors.{
-  IllegalLogin,
-  IllegalPassword
-}
+import com.baeldung.scala.exceptionhandling.LegacyErrors._
+import com.baeldung.scala.exceptionhandling.ValidationErrors._
 import org.scalatest.GivenWhenThen
 import org.scalatest.featurespec.AnyFeatureSpec
 import org.scalatest.matchers.should.Matchers

scala-core-modules/scala-core/src/main/scala-2/com/baeldung/scala/patternmatching/PatternMatching.scala renamed to scala-core-modules/scala-core/src/main/scala/com/baeldung/scala/patternmatching/PatternMatching.scala

@@ -1,11 +1,6 @@
 package com.baeldung.scala.introduction
 
-import com.baeldung.scala.introduction.Utils.{
-  average,
-  fibonacci,
-  power,
-  randomLessThan
-}
+import com.baeldung.scala.introduction.Utils._
 import org.junit.Assert.{assertEquals, assertTrue}
 import org.junit.Test