org.scalatest

GivenWhenThen

trait GivenWhenThen extends AnyRef

Trait that contains methods named given, when, then, and and, which take a string message and implicit Informer, and forward the message to the informer.

Here's an example:

package org.scalatest.examples.flatspec.info

import collection.mutable
import org.scalatest._

class SetSpec extends FlatSpec with GivenWhenThen {

  "A mutable Set" should "allow an element to be added" in {
    Given("an empty mutable Set")
    val set = mutable.Set.empty[String]

    When("an element is added")
    set += "clarity"

    Then("the Set should have size 1")
    assert(set.size === 1)

    And("the Set should contain the added element")
    assert(set.contains("clarity"))

    info("That's all folks!")
  }
}

If you run this FlatSpec from the interpreter, you will see the following output:

scala> new SetSpec execute
A mutable Set
- should allow an element to be added
  + Given an empty mutable Set
  + When an element is added
  + Then the Set should have size 1
  + And the Set should contain the added element
  + That's all folks!

Note: The lower case forms of given, when, then and and were deprecated in ScalaTest because using then as an identifier was deprecated in Scala 2.10.

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  1. def != (arg0: AnyRef): Boolean

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  2. def != (arg0: Any): Boolean

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  3. def ## (): Int

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  4. def == (arg0: AnyRef): Boolean

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  5. def == (arg0: Any): Boolean

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  6. def And (message: String)(implicit info: Informer): Unit

    Forwards a message to an implicit Informer, preceded by "And ".

    Forwards a message to an implicit Informer, preceded by "And ".

    message

    the message to forward to the passed informer

    info

    the Informer to which to forward the message

  7. def Given (message: String)(implicit info: Informer): Unit

    Forwards a message to an implicit Informer, preceded by "Given.

    Forwards a message to an implicit Informer, preceded by "Given."

    message

    the message to forward to the passed informer

    info

    the Informer to which to forward the message

  8. def Then (message: String)(implicit info: Informer): Unit

    Forwards a message to an implicit Informer, preceded by "Then ".

    Forwards a message to an implicit Informer, preceded by "Then ".

    message

    the message to forward to the passed informer

    info

    the Informer to which to forward the message

  9. def When (message: String)(implicit info: Informer): Unit

    Forwards a message to an implicit Informer, preceded by "When ".

    Forwards a message to an implicit Informer, preceded by "When ".

    message

    the message to forward to the passed informer

    info

    the Informer to which to forward the message

  10. def asInstanceOf [T0] : T0

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  11. def clone (): AnyRef

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  17. def isInstanceOf [T0] : Boolean

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  18. def ne (arg0: AnyRef): Boolean

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  19. def notify (): Unit

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  20. def notifyAll (): Unit

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  21. def synchronized [T0] (arg0: ⇒ T0): T0

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  22. def toString (): String

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  23. def wait (): Unit

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  24. def wait (arg0: Long, arg1: Int): Unit

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  25. def wait (arg0: Long): Unit

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  26. def and (message: String)(implicit info: Informer): Unit

    The lower case form of and was deprecated because using then as an identifier was deprecated in Scala 2.10. Please use the upper case form, And, instead.

    The lower case form of and was deprecated because using then as an identifier was deprecated in Scala 2.10. Please use the upper case form, And, instead.

    Annotations
    @deprecated
    Deprecated

    Please use And(message: String)(implicit info: Informer) instead.

  27. def given (message: String)(implicit info: Informer): Unit

    The lower case form of given was deprecated because using then as an identifier was deprecated in Scala 2.10. Please use the upper case form, Given, instead.

    The lower case form of given was deprecated because using then as an identifier was deprecated in Scala 2.10. Please use the upper case form, Given, instead.

    Annotations
    @deprecated
    Deprecated

    Please use Given(message: String)(implicit info: Informer) instead.

  28. def then (message: String)(implicit info: Informer): Unit

    The lower case form of then was deprecated because using then as an identifier was deprecated in Scala 2.10. Please use the upper case form, Then, instead.

    The lower case form of then was deprecated because using then as an identifier was deprecated in Scala 2.10. Please use the upper case form, Then, instead.

    Annotations
    @deprecated
    Deprecated

    Please use Then(message: String)(implicit info: Informer) instead.

  29. def when (message: String)(implicit info: Informer): Unit

    The lower case form of when was deprecated because using then as an identifier was deprecated in Scala 2.10. Please use the upper case form, When, instead.

    The lower case form of when was deprecated because using then as an identifier was deprecated in Scala 2.10. Please use the upper case form, When, instead.

    Annotations
    @deprecated
    Deprecated

    Please use When(message: String)(implicit info: Informer) instead.

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