added Convenience functions for Ior NonEmptyChain (#2522)

core/src/main/scala/cats/data/Ior.scala

@@ -138,7 +138,7 @@ sealed abstract class Ior[+A, +B] extends Product with Serializable {
   )
 }
 
-object Ior extends IorInstances with IorFunctions {
+object Ior extends IorInstances with IorFunctions with IorFunctions2 {
   final case class Left[+A](a: A) extends (A Ior Nothing)
   final case class Right[+B](b: B) extends (Nothing Ior B)
   final case class Both[+A, +B](a: A, b: B) extends (A Ior B)
@@ -354,3 +354,8 @@ private[data] sealed trait IorFunctions {
       case Right(b) => right(b)
     }
 }
+
+private[data] sealed trait IorFunctions2{
+  def leftNec[A, B](a: A): IorNec[A, B] = Ior.left(NonEmptyChain.one(a))
+  def bothNec[A, B](a: A, b: B): IorNec[A, B] = Ior.both(NonEmptyChain.one(a), b)
+}

tests/src/test/scala/cats/tests/IorSuite.scala

@@ -3,7 +3,7 @@ package tests
 
 import cats.kernel.laws.discipline.SemigroupTests
 import cats.laws.discipline.{BifunctorTests, BitraverseTests, SemigroupalTests, MonadErrorTests, SerializableTests, TraverseTests}
-import cats.data.{Ior, NonEmptyList, EitherT}
+import cats.data.{Ior,NonEmptyChain, NonEmptyList, EitherT}
 import cats.laws.discipline.arbitrary._
 import org.scalacheck.Arbitrary._
 
@@ -221,12 +221,24 @@ class IorSuite extends CatsSuite {
     }
   }
 
+  test("leftNec") {
+    forAll { (x: String) =>
+      Ior.leftNec(x).left should === (Some(NonEmptyChain.one(x)))
+    }
+  }
+
   test("bothNel") {
     forAll { (x: Int, y: String) =>
       Ior.bothNel(y, x).onlyBoth should === (Some((NonEmptyList.one(y), x)))
     }
   }
 
+  test("bothNec") {
+    forAll { (x: Int, y: String) =>
+      Ior.bothNec(y, x).onlyBoth should === (Some((NonEmptyChain.one(y), x)))
+    }
+  }
+
   test("getOrElse consistent with Option getOrElse") {
     forAll { (x: Int Ior String, default: String) =>
       x.getOrElse(default) should === (x.toOption.getOrElse(default))