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.test.environment.Live
import zio.clock.nanoTime
import Assertion.isGreaterThan

object MyTest extends DefaultRunnableSpec {
  def spec = suite("clock")(
    testM("time is non-zero") {
      assertM(Live.live(nanoTime))(isGreaterThan(0))
    }
  )
}
    Definition Classes
    zio
  • package environment

    The environment package contains testable versions of all the standard ZIO environment types through the TestClock, TestConsole, TestSystem, and TestRandom modules.

    The environment package contains testable versions of all the standard ZIO environment types through the TestClock, TestConsole, TestSystem, and TestRandom modules. See the documentation on the individual modules for more detail about using each of them.

    If you are using ZIO Test and extending RunnableSpec a TestEnvironment containing all of them will be automatically provided to each of your tests. Otherwise, the easiest way to use the test implementations in ZIO Test is by providing the TestEnvironment to your program.

    import zio.test.environment._

myProgram.provideLayer(testEnvironment)

    Then all environmental effects, such as printing to the console or generating random numbers, will be implemented by the TestEnvironment and will be fully testable. When you do need to access the "live" environment, for example to print debugging information to the console, just use the live combinator along with the effect as your normally would.

    If you are only interested in one of the test implementations for your application, you can also access them a la carte through the make method on each module. Each test module requires some data on initialization. Default data is included for each as DefaultData.

    import zio.test.environment._

myProgram.provideM(TestConsole.make(TestConsole.DefaultData))

    Finally, you can create a Test object that implements the test interface directly using the makeTest method. This can be useful when you want to access some testing functionality without using the environment type.

    import zio.test.environment._

for {
  testRandom <- TestRandom.makeTest(TestRandom.DefaultData)
  n          <- testRandom.nextInt
} yield n

    This can also be useful when you are creating a more complex environment to provide the implementation for test services that you mix in.

    Definition Classes
    test
  • Live
  • Restorable
  • TestClock
  • TestConsole
  • TestEnvironment
  • TestRandom
  • TestSystem
o

zio.test.environment

TestSystem

object TestSystem extends Serializable

TestSystem supports deterministic testing of effects involving system properties. Internally, TestSystem maintains mappings of environment variables and system properties that can be set and accessed. No actual environment variables or system properties will be accessed or set as a result of these actions.

import zio.system
import zio.test.environment.TestSystem

for {
  _      <- TestSystem.putProperty("java.vm.name", "VM")
  result <- system.property("java.vm.name")
} yield result == Some("VM")
Linear Supertypes
Serializable, Serializable, AnyRef, Any
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Inherited
  1. TestSystem
  2. Serializable
  3. Serializable
  4. AnyRef
  5. Any
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Visibility
  1. Public
  2. All

Type Members

  1. final case class Data(properties: Map[String, String] = Map.empty, envs: Map[String, String] = Map.empty, lineSeparator: String = "\n") extends Product with Serializable

    The state of the TestSystem.

  2. trait Service extends Restorable
  3. final case class Test(systemState: Ref[Data]) extends system.System.Service with Service with Product with Serializable

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. val DefaultData: Data

    The default initial state of the TestSystem with no environment variable or system property mappings and the system line separator set to the new line character.

  5. val any: ZLayer[System with TestSystem, Nothing, System with TestSystem]
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clearEnv(variable: ⇒ String): URIO[TestSystem, Unit]

    Accesses a TestSystem instance in the environment and clears the mapping of environment variables.

  8. def clearProperty(prop: ⇒ String): URIO[TestSystem, Unit]

    Accesses a TestSystem instance in the environment and clears the mapping of system properties.

  9. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  10. val default: Layer[Nothing, System with TestSystem]
  11. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  12. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  13. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  14. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  15. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  16. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  17. def live(data: Data): Layer[Nothing, System with TestSystem]

    Constructs a new TestSystem with the specified initial state.

    Constructs a new TestSystem with the specified initial state. This can be useful for providing the required environment to an effect that requires a Console, such as with ZIO#provide.

  18. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  19. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  20. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  21. def putEnv(name: ⇒ String, value: ⇒ String): URIO[TestSystem, Unit]

    Accesses a TestSystem instance in the environment and adds the specified name and value to the mapping of environment variables.

  22. def putProperty(name: ⇒ String, value: ⇒ String): URIO[TestSystem, Unit]

    Accesses a TestSystem instance in the environment and adds the specified name and value to the mapping of system properties.

  23. val save: ZIO[TestSystem, Nothing, UIO[Unit]]

    Accesses a TestSystem instance in the environment and saves the system state in an effect which, when run, will restore the TestSystem to the saved state

  24. def setLineSeparator(lineSep: ⇒ String): URIO[TestSystem, Unit]

    Accesses a TestSystem instance in the environment and sets the line separator to the specified value.

  25. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  26. def toString(): String
    Definition Classes
    AnyRef → Any
  27. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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