Packages

  • package root
    Definition Classes
    root
  • package org
    Definition Classes
    root
  • package scalatest

    ScalaTest's main traits, classes, and other members, including members supporting ScalaTest's DSL for the Scala interpreter.

    ScalaTest's main traits, classes, and other members, including members supporting ScalaTest's DSL for the Scala interpreter.

    Definition Classes
    org
  • trait OptionValues extends AnyRef

    Trait that provides an implicit conversion that adds a value method to Option, which will return the value of the option if it is defined, or throw TestFailedException if not.

    Trait that provides an implicit conversion that adds a value method to Option, which will return the value of the option if it is defined, or throw TestFailedException if not.

    This construct allows you to express in one statement that an option should be defined and that its value should meet some expectation. Here's an example:

    opt.value should be > 9

    Or, using an assertion instead of a matcher expression:

    assert(opt.value > 9)

    Were you to simply invoke get on the Option, if the option wasn't defined, it would throw a NoSuchElementException:

    val opt: Option[Int] = None

    opt.get should be > 9 // opt.get throws NoSuchElementException

    The NoSuchElementException would cause the test to fail, but without providing a stack depth pointing to the failing line of test code. This stack depth, provided by TestFailedException (and a few other ScalaTest exceptions), makes it quicker for users to navigate to the cause of the failure. Without OptionValues, to get a stack depth exception you would need to make two statements, like this:

    val opt: Option[Int] = None

    opt should be ('defined) // throws TestFailedException
opt.get should be > 9

    The OptionValues trait allows you to state that more concisely:

    val opt: Option[Int] = None

    opt.value should be > 9 // opt.value throws TestFailedException

    Definition Classes
    scalatest
  • Valuable

class Valuable[T] extends AnyRef

Wrapper class that adds a value method to Option, allowing you to make statements like:

opt.value should be > 9

Source
OptionValues.scala
Linear Supertypes
AnyRef, Any
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Instance Constructors

  1. new Valuable(opt: Option[T], pos: Position)

    opt

    An option to convert to Valuable, which provides the value method.

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
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  3. final def ==(arg0: Any): Boolean
    Definition Classes
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  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
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    @native() @throws( ... )
  6. final def eq(arg0: AnyRef): Boolean
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  7. def equals(arg0: Any): Boolean
    Definition Classes
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  8. def finalize(): Unit
    Attributes
    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]
    Definition Classes
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    Annotations
    @native()
  10. def hashCode(): Int
    Definition Classes
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    Annotations
    @native()
  11. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  12. final def ne(arg0: AnyRef): Boolean
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  13. final def notify(): Unit
    Definition Classes
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    @native()
  14. final def notifyAll(): Unit
    Definition Classes
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    @native()
  15. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
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  16. def toString(): String
    Definition Classes
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  17. def value: T

    Returns the value contained in the wrapped Option, if defined, else throws TestFailedException with a detail message indicating the option was not defined.

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

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