MatcherProducers
Related Docs:
trait MatcherProducers
| package matchers
Class used via an implicit conversion that adds composeTwice, mapResult, and
mapArgs methods to functions that produce a Matcher.
Class used via an implicit conversion that adds composeTwice, mapResult, and
mapArgs methods to functions that produce a Matcher.
Implicit conversion that converts a function of T => Matcher[T] to an object that has
composeTwice, mapResult and mapArgs methods.
Implicit conversion that converts a function of T => Matcher[T] to an object that has
composeTwice, mapResult and mapArgs methods.
The following shows how this trait is used to compose twice and modify error messages:
import org.scalatest._
import matchers._
import MatcherProducers._
val f = be > (_: Int)
val g = (_: String).toInt
// f composeTwice g means: (f compose g) andThen (_ compose g)
val beAsIntsGreaterThan =
f composeTwice g mapResult { mr =>
mr.copy(
failureMessageArgs =
mr.failureMessageArgs.map((LazyArg(_) { "\"" + _.toString + "\".toInt"})),
negatedFailureMessageArgs =
mr.negatedFailureMessageArgs.map((LazyArg(_) { "\"" + _.toString + "\".toInt"})),
midSentenceFailureMessageArgs =
mr.midSentenceFailureMessageArgs.map((LazyArg(_) { "\"" + _.toString + "\".toInt"})),
midSentenceNegatedFailureMessageArgs =
mr.midSentenceNegatedFailureMessageArgs.map((LazyArg(_) { "\"" + _.toString + "\".toInt"}))
)
}
"7" should beAsIntsGreaterThan ("8")
The last assertion will fail with message like this:
"7".toInt was not greater than "8".toInt
the type used by function f
a function that takes a T and return a Matcher[T]
an object that has composeTwice, mapResult and mapArgs methods.
Companion object that facilitates the importing of
MatcherProducersmembers as an alternative to mixing it in. One use case is to importMatcherProducers's members so you can useMatcherProducersin the Scala interpreter.