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Matchers for working with cats data types:

  • the org.specs2.matcher.IOMatchers trait provides synchronous matchers for checking IO values

  • the org.specs2.matcher.IOExecution trait allows to return any IO[T] in a specs2 example provided there is an implicit org.specs2.execute.AsResult instance in scope (this is the case for Boolean, org.specs2.execute.Result for example). This is the preferred way of executing IO values since they execute asynchronously when the example runs

  • the org.specs2.matcher.ValidatedMatchers trait provides matchers for Validated[T] values

  • the org.specs2.matcher.NonEmptyMatchers trait provides haveSize matchers for NonEmpty(List, Chain, Vector) values

Go to specs2.org to learn more about specs2!