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Check laws on XorT SemigroupK instance #679

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Nov 19, 2015
Merged

Check laws on XorT SemigroupK instance #679

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8 changes: 7 additions & 1 deletion tests/src/test/scala/cats/tests/XorTTests.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ package tests

import cats.functor.Bifunctor
import cats.data.{Xor, XorT}
import cats.laws.discipline.{BifunctorTests, FoldableTests, FunctorTests, MonadErrorTests, MonoidKTests, SerializableTests, TraverseTests}
import cats.laws.discipline._
import cats.laws.discipline.arbitrary._
import algebra.laws.OrderLaws

Expand Down Expand Up @@ -45,6 +45,12 @@ class XorTTests extends CatsSuite {
checkAll("Eq[XorT[ListWrapper, String, Int]]", SerializableTests.serializable(Eq[XorT[ListWrapper, String, Int]]))
}

{
implicit val L = ListWrapper.semigroup[String]
checkAll("XorT[Option, ListWrapper[String], ?]", SemigroupKTests[XorT[Option, ListWrapper[String], ?]].semigroupK[Int])
checkAll("SemigroupK[XorT[Option, ListWrapper[String], ?]]", SerializableTests.serializable(SemigroupK[XorT[Option, ListWrapper[String], ?]]))
}

// make sure that the Monad and Traverse instances don't result in ambiguous
// Functor instances
Functor[XorT[List, Int, ?]]
Expand Down