Packages

  • package root
    Definition Classes
    root
  • package zio
    Definition Classes
    root
  • package test

    _ZIO Test_ is a featherweight testing library for effectful programs.

    _ZIO Test_ is a featherweight testing library for effectful programs.

    The library imagines every spec as an ordinary immutable value, providing tremendous potential for composition. Thanks to tight integration with ZIO, specs can use resources (including those requiring disposal), have well- defined linear and parallel semantics, and can benefit from a host of ZIO combinators.

    import zio.test._
import zio.Clock.nanoTime

object MyTest extends ZIOSpecDefault {
  def spec = suite("clock")(
    test("time is non-zero") {
      for {
        time <- Live.live(nanoTime)
      } yield assertTrue(time >= 0L)
    }
  )
}
    Definition Classes
    zio
  • package diff
    Definition Classes
    test
  • package internal
    Definition Classes
    test
  • package laws

    The laws package provides functionality for describing laws as values.

    The laws package provides functionality for describing laws as values. The fundamental abstraction is a set of ZLaws[Caps, R]. These laws model the laws that instances having a capability of type Caps are expected to satisfy. A capability Caps[_] is an abstraction describing some functionality that is common across different data types and obeys certain laws. For example, we can model the capability of two values of a type being compared for equality as follows:

    trait Equal[-A] {
  def equal(a1: A, a2: A): Boolean
}

    Definitions of equality are expected to obey certain laws:

    1. Reflexivity - a1 === a1
    2. Symmetry - a1 === a2 ==> a2 === a1
    3. Transitivity - (a1 === a2) && (a2 === a3) ==> (a1 === a3)

    These laws define what the capabilities mean and ensure that it is safe to abstract across different instances with the same capability.

    Using ZIO Test, we can represent these laws as values. To do so, we define each law using one of the ZLaws constructors. For example:

    val transitivityLaw = ZLaws.Laws3[Equal]("transitivityLaw") {
  def apply[A: Equal](a1: A, a2: A, a3: A): TestResult =
    ???
}

    We can then combine laws using the + operator:

    val reflexivityLaw: = ???
val symmetryLaw:    = ???

val equalLaws = reflexivityLaw + symmetryLaw + transitivityLaw

    Laws have a run method that takes a generator of values of type A and checks that those values satisfy the laws. In addition, objects can extend ZLawful to provide an even more convenient syntax for users to check that instances satisfy certain laws.

    object Equal extends Lawful[Equal]

object Hash extends Lawful[Hash]

object Ord extends Lawful[Ord]

checkAllLaws(Equal + Hash + Ord)(Gen.int)

    Note that capabilities compose seamlessly because of contravariance. We can combine laws describing different capabilities to construct a set of laws requiring that instances having all of the capabilities satisfy each of the laws.

    Definition Classes
    test
  • package magnolia
    Definition Classes
    test
  • DeriveDiff
  • DeriveGen
  • LowPri
  • package poly
    Definition Classes
    test
  • package refined
    Definition Classes
    test
  • package render
    Definition Classes
    test
  • package results
    Definition Classes
    test
  • package scalacheck

    This package provides helpers to integrate *some* ScalaCheck primitives to their ZIO equivalents.

    This package provides helpers to integrate *some* ScalaCheck primitives to their ZIO equivalents. Currently available helpers:

    • Converting ScalaCheck Generators to ZIO Generators
    • Asserting a ScalaCheck Prop with ZIO
    • Asserting a ScalaCheck Properties with ZIO

    **Generators**

    This functionality converts legacy ScalaCheck generators to ZIO Test generators to support upgrading to ZIO Test without having to reimplement existing generators. To use it import this module and then call toGenZIO on any existing ScalaCheck generator. For example:

    import org.scalacheck.Arbitrary

import zio._
import zio.test._
import zio.test.scalacheck._

val anyInt: Gen[Any, Int] =
  Arbitrary.arbitrary[Int].toGenZIO

    **Asserting ScalaCheck Prop and Properties**

    This functionality generates ZIO Assertions from either ScalaCheck Prop or Properties. This helps with integrating other libraries that provide ScalaCheck properties as helpers, i.e. cats-laws.

    Prop example:

    import org.scalacheck.Prop
import org.scalacheck.Test.{ Parameters => ScalaCheckParameters }

import zio._
import zio.test._
import zio.test.scalacheck._

val prop: Prop = Prop.forAll { (n: Int, m: Int) =>
  n + m == m + n
}
val resultDefault: TestResult = prop.assertZIO()

val resultWithCustomizations: TestResult =
  prop.assertZIO("My Prop Name", ScalaCheckParameters.default.withMaxSize(10))

    Properties example:

    import org.scalacheck.{ Prop, Properties }
import org.scalacheck.Test.{ Parameters => ScalaCheckParameters }

import zio._
import zio.test._
import zio.test.scalacheck._

object MyProperties extends Properties("MyProperties") {
  property("myProp") = Prop.forAll { (n: Int, m: Int) =>
    n + m == m + n
  }
}

* val resultDefault: TestResult = MyProperties.assertZIO()

// Beware that we can't provide a custom name here, it will be
// taken from the `Properties` name parameter
val resultWithCustomizations: TestResult =
  MyProperties.assertZIO(ScalaCheckParameters.default.withMaxSize(10))
    Definition Classes
    test
p

zio.test

magnolia

package magnolia

Ordering
  1. Alphabetic
Visibility
  1. Public
  2. Protected

Type Members

  1. trait DeriveDiff extends LowPri
  2. trait DeriveGen[A] extends AnyRef

    A DeriveGen[A] can derive a generator of A values.

    A DeriveGen[A] can derive a generator of A values. Implicit instances of DeriveGen are automatically provided for standard types and algebraic data types made up of standard types. For example, here is how you can automatically derive generators for case classes and sealed traits:

    final case class Point(x: Double, y: Double)

val genPoint: Gen[Any, Point] = DeriveGen[Point]

sealed trait Color
case object Red   extends Color
case object Green extends Color
case object Blue  extends Color

val genColor: Gen[Any, Color] = DeriveGen[Color]

    You can derive generators that include your own custom types by providing an implicit DeriveGen instance for your type using a generator and the instance method.

  3. trait LowPri extends AnyRef

Value Members

  1. object DeriveDiff extends DeriveDiff
  2. object DeriveGen

Ungrouped