kotlin.test / kotlin.test / expect expect Common JVM JS Native 1.0 inline fun < T > expect ( expected : T , block : ( ) -> T ) : Unit (source) Asserts that given function block returns the given expected value. Common JVM JS Native 1.0 inline fun < T > expect ( expected : T , message : String ? , block : ( ) -> T ) : Unit (source) Asserts that given function block returns the given expected value and use the given message if it fails.