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

CompileVariants

CustomAssertion

Eql

ErrorMessage

ExecutionEvent

ExecutionEventSink

FailureCase

FunctionVariants

Gen

GenFailureDetails

GenZIO

Live

PrettyPrintVersionSpecific

ProvideSomePartiallyApplied

ProvideSomeSharedPartiallyApplied

ReporterEventRenderer

Restorable

Result

Sample

Sized

SmartAssertMacros

SmartAssertionOps

SmartSpecMacros

Spec

SpecLayerMacros

SuiteConstructor

SuiteConstructorLowPriority1

SuiteConstructorLowPriority2

SuiteConstructorLowPriority3

SuiteConstructorLowPriority4

SuiteId

Summary

SummaryBuilder

TestAnnotation

TestAnnotationMap

TestAnnotationRenderer

TestArrow

TestAspect

TestClock

TestClockPlatformSpecific

TestConfig

TestConsole

TestConstructor

TestConstructorLowPriority1

TestConstructorLowPriority2

TestConstructorLowPriority3

TestDuration

TestEnvironment

TestExecutor

TestFailure

TestLens

TestLensAnyOps

TestLensCauseOps

TestLensEitherOps

TestLensExitOps

TestLensOptionOps

TestLogger

TestPlatform

TestRandom

TestReporters

TestResult

TestResultZIOOps

TestRunner

TestServices

TestSuccess

TestSystem

TestTimeoutException

TestTrace

TestVersion

TimeVariants

TimeoutVariants

ZIOSpec

ZIOSpecAbstract

ZIOSpecAbstractVersionSpecific

ZIOSpecDefault

ZIOSpecVersionSpecific

ZTest

ZTestEventHandler

ZTestLogger

zio.test

Live

Companion object Live

trait Live extends AnyRef

The Live trait provides access to the "live" default ZIO services from within ZIO Test for workflows such as printing test results to the console or timing out tests where it is necessary to access the real implementations of these services.

The easiest way to access the "live" services is to use the live method with a workflow that would otherwise use the test version of the default ZIO services.

import zio.Clock
import zio.test._

val realTime = live(Clock.nanoTime)

The withLive method can be used to apply a transformation to a workflow with the live services while ensuring that the workflow itself still runs with the test services, for example to time out a test. Both of these methods are re-exported in the ZIO Test package object for easy availability.

Linear Supertypes

AnyRef, Any

Known Subclasses

Test

Ordering

Alphabetic
By Inheritance

Inherited

Live
AnyRef
Any

Hide All
Show All

Visibility

Public
All

Abstract Value Members

abstract def provide[R, E, A](zio: ZIO[R, E, A])(implicit trace: Trace): ZIO[R, E, A]

Concrete 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()
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
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
Annotations
@native()
def hashCode(): Int

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

Definition Classes
Any
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
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()

Packages

Live

Companion object Live

trait Live extends AnyRef

Abstract Value Members

Concrete Value Members

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

Live 

Companion object Live

trait Live extends AnyRef

Abstract Value Members

Concrete Value Members

Inherited from AnyRef

Inherited from Any

Ungrouped

Live