scalaprops.scalazlaws.monoid.scala Maven / Gradle / Ivy

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package scalaprops
package scalazlaws

import scalaprops.Property.forAll
import scalaprops.Properties.properties
import scalaz._

object monoid {
  def leftIdentity[A: Equal: Gen](implicit A: Monoid[A]): Property =
    forAll(A.monoidLaw.leftIdentity _)

  def rightIdentity[A: Equal: Gen](implicit A: Monoid[A]): Property =
    forAll(A.monoidLaw.rightIdentity _)

  def laws[A: Monoid: Equal: Gen]: Properties[ScalazLaw] =
    properties(ScalazLaw.monoid) (
      ScalazLaw.monoidLeftIdentity -> leftIdentity[A],
      ScalazLaw.monoidRightIdentity -> rightIdentity[A]
    )

  def all[A: Monoid: Equal: Gen]: Properties[ScalazLaw] =
    Properties.fromProps(ScalazLaw.monoidAll, semigroup.laws[A], monoid.laws[A])
}