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.
Supertrait for typeclasses that enable
be emptymatcher syntax.An
Emptiness[T]provides access to the "emptiness" of typeTin such a way thatbe emptymatcher syntax can be used with typeT. ATcan be any type that in some way can be empty. ScalaTest provides implicit implementations for several types. You can enable thebe emptymatcher syntax on your own typeUby defining anEmptiness[U]for the type and making it available implicitly.ScalaTest provides implicit
Emptinessinstances forscala.collection.GenTraversable,java.util.Collection,java.util.Map,String,Array, andscala.Optionin theEmptinesscompanion object.