How to use ScalaTest “contain allOf” on two lists?

Question

I was looking for a ScalaTest matcher to check that a list contains all of the needed elements (given within another list), but that may also be others.

contai

Answer 1

I don't think there's any good reason for this. You can remedy this with a pimp my class:

object ScalaTestUtils {
    import org.scalatest.words.ResultOfContainWord

    implicit class ResultOfContainWordImprovements[T](val contains: ResultOfContainWord[Seq[T]]) {
        def allOf(right: Seq[T]) = contains allOf(right.head, right.tail.head, right.tail.tail :_*)
    }
}

You should probably make this account for Seqs with fewer than 2 elements (for which this would fail).

Then, you can do:

import ScalaTestUtils._
Seq(1, 2, 3) should contain allOf Seq(1, 2)