trait Existence[-S] extends AnyRef
Supertrait for typeclasses that enable the exist matcher syntax.
An Existence[S] provides access to the "existence nature" of type S in such
a way that exist matcher syntax can be used with type S. A S
can be any type for which the concept of existence makes sense, such as java.io.File. ScalaTest provides
implicit implementations for java.io.File. You can enable the exist matcher syntax on your own
type U by defining a Existence[U] for the type and making it available implicitly.
ScalaTest provides an implicit Existence instance for java.io.File
in the Existence companion object.
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abstract
def
exists(thing: S): Boolean
Determines whether the passed thing exists, i.e., whether the passed
java.io.Fileexists.Determines whether the passed thing exists, i.e., whether the passed
java.io.Fileexists.- thing
the thing to check for existence
- returns
trueif passed thing exists,falseotherwise
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