TestLens
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Always returns true as long the chain of preceding transformations has succeeded.
Always returns true as long the chain of preceding transformations has succeeded.
val option: Either[Int, Option[String]] = Right(Some("Cool"))
assertTrue(option.is(_.right.some.anything)) // returns true
assertTrue(option.is(_.left.anything)) // will fail because of `.left`.
Attributes
Transforms a value with the given CustomAssertion
Transforms an scala.Either to its scala.Left value E, otherwise fails if it is a scala.Right.
Transforms an scala.Either to its scala.Left value E, otherwise fails if it is a scala.Right.
Attributes
Transforms an scala.Either to its scala.Right value A, otherwise fails if it is a scala.Left.
Transforms an scala.Either to its scala.Right value A, otherwise fails if it is a scala.Left.
Attributes
Transforms an scala.Option to its Some value A, otherwise fails if it is a None.
Transforms a value of some type into the given Subtype if possible, otherwise fails.
Transforms a value of some type into the given Subtype if possible, otherwise fails.
sealed trait CustomError
case class Explosion(blastRadius: Int) extends CustomError
case class Melting(degrees: Double) extends CustomError
case class Fulminating(wow: Boolean) extends CustomError
val error: CustomError = Melting(100)
assertTrue(option.is(_.subtype[Melting]).degrees > 10) // succeeds
assertTrue(option.is(_.subtype[Explosion]).blastRadius == 12) // fails