Open Fabs opened 6 years ago
On the exercise of Foldable traverse, it accepts a wrong answer as proper:
traverse
import cats.implicits._ def parseInt(s: String): Option[Int] = Either.catchOnly[NumberFormatException](s.toInt).toOption Foldable[List].traverse_(List("1", "2", "3"))(parseInt) should be(Some(42))
Since traverse_ returns G[Unit], correct answer should be Some(()). But it is accepting Some of anything. Maybe it is even a bug on scalatest since on a workspace:
G[Unit]
Some(())
scalatest
Foldable[List].traverse_(List("1", "2"))(parseInt) == Some(()) Foldable[List].traverse_(List("1", "2"))(parseInt) == Some(42)
Outputs:
true false
This also applies to the last Traversable exercise:
On the exercise of Foldable
traverse
, it accepts a wrong answer as proper:Since traverse_ returns
G[Unit]
, correct answer should beSome(())
. But it is accepting Some of anything. Maybe it is even a bug onscalatest
since on a workspace:Outputs: