Merge pull request #26 from scala-exercises/reuse-tail-list-exercise

Fix reuse list tail exercise

Author: raulraja

src/main/scala/stdlib/Lists.scala

@@ -148,7 +148,7 @@ object Lists extends FlatSpec with Matchers with exercise.Section {
 
   /** Lists reuse their tails
     */
-  def reuseTailsLists(res0: Int, res1: Int, res2: Int, res3: String, res4: String, res5: String) {
+  def reuseTailsLists(res0: Int, res1: Int, res2: Int, res3: List[Int], res4: List[Int], res5: List[Int]) {
     val d = Nil
     val c = 3 :: d
     val b = 2 :: c

src/test/scala/exercises/stdlib/ListsSpec.scala

@@ -126,13 +126,12 @@ class ListsSpec extends Spec with Checkers {
     )
   }
 
-  // FIXME: depends on #259
-  // def `lists share tails` = {
-  //   check(
-  //     Test.testSuccess(
-  //       Lists.reuseTailsLists _,
-  //       HNil
-  //     )
-  //   )
-  // }
+  def `lists share tails` = {
+    check(
+      Test.testSuccess(
+        Lists.reuseTailsLists _,
+        1 :: 2 :: 3 :: List(2, 3) :: List(3) :: List.empty[Int] :: HNil
+      )
+    )
+  }
 }