Packages

package root

Definition Classes: root

package zio

Definition Classes: root

package test

_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:

Reflexivity - a1 === a1
Symmetry - a1 === a2 ==> a2 === a1
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 poly

Definition Classes: test

package render

Definition Classes: test

package results

Definition Classes: test

Annotations

Assertion

AssertionVariants

CheckConstructor

CheckConstructorLowPriority1

CheckConstructorLowPriority2

CheckConstructorLowPriority3

CheckVariants

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CustomAssertion

Eql

ErrorMessage

ExecutionEvent

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FunctionVariants

Gen

GenFailureDetails

GenZIO

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Summary

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TestAnnotation

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TestClock

TestClockPlatformSpecific

TestConfig

TestConsole

TestConstructor

TestConstructorLowPriority1

TestConstructorLowPriority2

TestConstructorLowPriority3

TestDuration

TestEnvironment

TestExecutor

TestFailure

TestLens

TestLensAnyOps

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TestLensEitherOps

TestLensExitOps

TestLensOptionOps

TestLogger

TestPlatform

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TestTimeoutException

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TimeVariants

TimeoutVariants

ZIOSpec

ZIOSpecAbstract

ZIOSpecAbstractVersionSpecific

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ZTest

ZTestEventHandler

ZTestLogger

zio.test

Live

Companion trait Live

object Live

Linear Supertypes

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Type Members

final case class Test(zenv: ZEnvironment[Clock with Console with System with Random]) extends Live with Product with Serializable

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws( ... ) @native()
val default: ZLayer[Clock with Console with System with Random, Nothing, Live]
Constructs a new Live service that implements the Live interface.
Constructs a new Live service that implements the Live interface. This typically should not be necessary as the TestEnvironment already includes the Live service but could be useful if you are mixing in interfaces to create your own environment type.
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[lang]
Definition Classes
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Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
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Annotations
@native()
def hashCode(): Int

Definition Classes
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Annotations
@native()
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def live[R, E, A](zio: ZIO[R, E, A])(implicit trace: Trace): ZIO[R, E, A]
Provides a workflow with the "live" default ZIO services.
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
Annotations
@native()
final def notifyAll(): Unit

Definition Classes
AnyRef
Annotations
@native()
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
val tag: Tag[Live]
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... ) @native()
def withLive[R, E, E1, A, B](zio: ZIO[R, E, A])(f: (ZIO[R, E, A]) ⇒ ZIO[R, E1, B])(implicit trace: Trace): ZIO[R, E1, B]
Runs a transformation function with the live default ZIO services while ensuring that the workflow itself is run with the test services.

Packages

Live

Companion trait Live

object Live

Type Members

Value Members

Inherited from AnyRef

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Packages

Live 

Companion trait Live

object Live

Type Members

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Inherited from AnyRef

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Live