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trait Emptiness[-T] extends AnyRef

Supertrait for typeclasses that enable be empty matcher syntax.

An Emptiness[T] provides access to the "emptiness" of type T in such a way that be empty matcher syntax can be used with type T. A T can be any type that in some way can be empty. ScalaTest provides implicit implementations for several types. You can enable the be empty matcher syntax on your own type U by defining an Emptiness[U] for the type and making it available implicitly.

ScalaTest provides implicit Emptiness instances for scala.collection.GenTraversable, java.util.Collection, java.util.Map, String, Array, and scala.Option in the Emptiness companion object.

Source
Emptiness.scala
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Abstract Value Members

  1. abstract def isEmpty(thing: T): Boolean

    Determines whether the passed thing is readable, i.e., the passed file is readable.

    Determines whether the passed thing is readable, i.e., the passed file is readable.

    thing

    the thing to check for emptiness

    returns

    true if passed thing is empty, false otherwise