stopContainer()
                } catch (InterruptedException ex) {
                    // nothing to do
                }
            }
        })
        monitor.start()
    }

    void stopContainer() {
        if (started) {
            started = false
            container.stop()

            assertOutputContains("/gradle-home/caches/modules-2/files-2.1/org.readonly/util/1.0/")
        }

        cleanup:
        container.stopContainer()
    }

    def "can use a read-only cache within multiple containers concurrently (daemon in container=#daemon)"() {
        given:
        def ids = (0..3)
        exposeServerToContainers()