@Rule
    BlockingHttpServer server = new BlockingHttpServer()

    def "client can cancel during execution of a continuous build"() {
        given:
        setupCancellationBuild()
        def sync = server.expectAndBlock('sync')

        when:
        runBuild {
            sync.waitForAllPendingCalls()
            cancellationTokenSource.cancel()
            sync.releaseAll()