def "does nothing when nothing scheduled"() {
        when:
        def result = scheduleAndRun(new TreeServices(manyWorkers)) {
            // Nothing
        }

        then:
        result.failures.empty
    }

    def "runs scheduled work"() {
        def services = new TreeServices(workers)
        def build = build(services, DefaultBuildIdentifier.ROOT)
        def node = new TestNode()