org.scalatest.LoneElement

LoneElementCollectionWrapper

final class LoneElementCollectionWrapper[E, CTC[_]] extends AnyRef

Wrapper class that adds a loneElement method to any collection type C for which an implicit Collecting[C] is available.

Through the implicit conversion provided by trait LoneElement, this class allows you to make statements like:

trav.loneElement should be > 9

E

the element type of the collection on which to add the loneElement method

CTC

the "collection type constructor" for the collection on which to add the loneElement method

Source
LoneElement.scala
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Instance Constructors

  1. new LoneElementCollectionWrapper(collection: CTC[E])(implicit collecting: Collecting[E, CTC[E]])

    collection

    a collection to wrap in a LoneElementCollectionWrapper, which provides the loneElement method.

    collecting

    a typeclass that enables the loneElement syntax

Value Members

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

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

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  3. final def ##(): Int

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

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

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  6. final def asInstanceOf[T0]: T0

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  7. def clone(): AnyRef

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  8. final def eq(arg0: AnyRef): Boolean

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  9. def equals(arg0: Any): Boolean

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  10. def finalize(): Unit

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  11. final def getClass(): Class[_]

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  12. def hashCode(): Int

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  13. final def isInstanceOf[T0]: Boolean

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  14. def loneElement: E

    Returns the value contained in the wrapped collection, if it contains one and only one element, else throws TestFailedException with a detail message describing the problem.

    Returns the value contained in the wrapped collection, if it contains one and only one element, else throws TestFailedException with a detail message describing the problem.

    This method enables syntax such as the following:

    trav.loneElement should be > 9
         ^
    

  15. final def ne(arg0: AnyRef): Boolean

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  16. final def notify(): Unit

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  17. final def notifyAll(): Unit

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  18. final def synchronized[T0](arg0: ⇒ T0): T0

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  19. def toString(): String

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  20. final def wait(): Unit

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

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    @throws()
  22. final def wait(arg0: Long): Unit

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