Add XorT.toValidatedNel

markus1189 · Jul 13, 2016 · 32438a9 · 32438a9
1 parent 579e0b4
commit 32438a9
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diff --git a/core/src/main/scala/cats/data/XorT.scala b/core/src/main/scala/cats/data/XorT.scala
@@ -157,6 +157,9 @@ final case class XorT[F[_], A, B](value: F[A Xor B]) {
   def toValidated(implicit F: Functor[F]): F[Validated[A, B]] =
     F.map(value)(_.toValidated)
 
+  def toValidatedNel(implicit F: Functor[F]): F[ValidatedNel[A, B]] =
+    F.map(value)(_.toValidatedNel)
+
   /** Run this value as a `[[Validated]]` against the function and convert it back to an `[[XorT]]`.
    *
    * The [[Applicative]] instance for `XorT` "fails fast" - it is often useful to "momentarily" have

diff --git a/tests/src/test/scala/cats/tests/XorTTests.scala b/tests/src/test/scala/cats/tests/XorTTests.scala
@@ -113,6 +113,12 @@ class XorTTests extends CatsSuite {
     }
   }
 
+  test("toValidatedNel") {
+    forAll { (xort: XorT[List, String, Int]) =>
+      xort.toValidatedNel.map(_.toXor.leftMap(_.head)) should === (xort.value)
+    }
+  }
+
   test("withValidated") {
     forAll { (xort: XorT[List, String, Int], f: String => Char, g: Int => Double) =>
       xort.withValidated(_.bimap(f, g)) should === (xort.bimap(f, g))