FileUtils.copyURLToFile(fileUrl, new File(configDir, "test-dsa.key"))

        SshServer sshServer = SshServer.setUpDefaultServer()
        sshServer.setPort(sshPort)
        sshServer.setFileSystemFactory(new TestVirtualFileSystemFactory())
        sshServer.setSubsystemFactories(Arrays.<NamedFactory<Command>> asList(new SftpSubsystemFactory() {
            Command createSubsystem(ChannelSession channel) {