e.message == 'string not found.'
    }

    @Requires(UnitTestPreconditions.Jdk8OrEarlier)
    // todo: find a way to mock this in JDK 9+, where `getDefinedPackage` is final
    public void loadsPackageFromParentsInOrderSpecified() {
        def stringPackage = String.class.getPackage()
        def listPackage = List.class.getPackage()

        given:
        _ * parent1.getPackage('string') >> stringPackage