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.
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- Emptiness.scala
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- 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
trueif passed thing is empty,falseotherwise
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