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 empty
matcher syntax.An
Emptiness[T]
provides access to the "emptiness" of typeT
in such a way thatbe empty
matcher syntax can be used with typeT
. AT
can be any type that in some way can be empty. ScalaTest provides implicit implementations for several types. You can enable thebe empty
matcher syntax on your own typeU
by defining anEmptiness[U]
for the type and making it available implicitly.ScalaTest provides implicit
Emptiness
instances forscala.collection.GenTraversable
,java.util.Collection
,java.util.Map
,String
,Array
, andscala.Option
in theEmptiness
companion object.