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TypeClassLawsForIterantIOSuite.scala
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TypeClassLawsForIterantIOSuite.scala
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/*
* Copyright (c) 2014-2018 by The Monix Project Developers.
* See the project homepage at: https://monix.io
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package monix.tail
import cats.Eq
import cats.data.EitherT
import cats.effect.IO
import cats.effect.laws.discipline.AsyncTests
import cats.laws.discipline.{CoflatMapTests, DeferTests, MonadErrorTests, MonoidKTests, SemigroupalTests}
import monix.execution.schedulers.TestScheduler
object TypeClassLawsForIterantIOSuite extends BaseLawsSuite {
type F[α] = Iterant[IO, α]
implicit lazy val ec: TestScheduler = TestScheduler()
// Explicit instance due to weird implicit resolution problem
implicit lazy val iso: SemigroupalTests.Isomorphisms[F] =
SemigroupalTests.Isomorphisms.invariant[F]
// Explicit instance, since Scala can't figure it out below :-(
lazy val eqEitherT: Eq[EitherT[F, Throwable, Int]] =
implicitly[Eq[EitherT[F, Throwable, Int]]]
checkAllAsync("Defer[Iterant[IO]]") { implicit ec =>
DeferTests[F].defer[Int]
}
checkAllAsync("MonadError[Iterant[IO]]") { _ =>
implicit val eqE = eqEitherT
MonadErrorTests[F, Throwable].monadError[Int, Int, Int]
}
checkAllAsync("MonoidK[Iterant[IO]]") { implicit ec =>
MonoidKTests[F].monoidK[Int]
}
checkAllAsync("CoflatMap[Iterant[IO]]") { implicit ec =>
CoflatMapTests[F].coflatMap[Int, Int, Int]
}
}