startBuild()
        waitForBuildToWait()

        then:
        busy()
        daemonContext {
            File registry = new DaemonDir(executer.daemonBaseDir).registry
            deleteFile(registry)
        }
        startBuild()
        waitForBuildToWait(1)

        then:
        daemonContext(0) {
            assert (new DaemonDir(executer.daemonBaseDir).registry.exists())
        }

class DaemonRegistryStateProbe implements DaemonStateProbe {
    private final DaemonRegistry registry
    private final DaemonContext context

    DaemonRegistryStateProbe(DaemonRegistry registry, DaemonContext context) {
        this.context = context
        this.registry = registry
    }

    void resetToken() {

        this.daemon = daemon;
    }

    @Override
    public DaemonExpirationResult checkExpiration() {
        try {
            final DaemonContext daemonContext = daemon.getDaemonContext();
            final File daemonRegistryDir = daemonContext.getDaemonRegistryDir();
            if (!new DaemonDir(daemonRegistryDir).getRegistry().canRead()) {

        registry.store(new DaemonInfo(address1, daemonContext(), "password".bytes, Idle))
        registry.store(new DaemonInfo(address2, daemonContext(), "password".bytes, Idle))

        expect:
        registry.all.size() == 1
    }

    DaemonContext daemonContext() {

     */
    @Nullable
    DaemonClientConnection connect(ExplainingSpec<DaemonContext> constraint);

    /**
     * Starts a new daemon and returns a connection to it.
     */
    DaemonClientConnection startDaemon(ExplainingSpec<DaemonContext> constraint);

    /**
     * Starts a new daemon for single use and returns a connection to it.
     */

class DaemonLogFileStateProbe implements DaemonStateProbe {
    private final DaemonContext context
    private final DaemonLogFile log
    private final String startBuildMessage
    private final String finishBuildMessage

    DaemonLogFileStateProbe(DaemonLogFile daemonLog, DaemonContext context, String startBuildMessage = DaemonMessages.STARTED_BUILD, String finishBuildMessage = DaemonMessages.FINISHED_BUILD) {

     */
    public void executeCommand(DaemonConnection connection, Command command, DaemonContext daemonContext, DaemonStateControl daemonStateControl) {
        new DaemonCommandExecution(
            configuration,
            connection,
            command,
            daemonContext,
            daemonStateControl,
            actions
        ).proceed();
    }

import org.gradle.internal.serialize.Serializer
import org.gradle.jvm.toolchain.JavaLanguageVersion
import org.gradle.launcher.daemon.configuration.DaemonParameters
import org.gradle.launcher.daemon.context.DaemonContext
import org.gradle.launcher.daemon.context.DefaultDaemonContext
import org.gradle.launcher.daemon.diagnostics.DaemonStartupInfo
import org.gradle.launcher.daemon.registry.DaemonInfo

        final Set<String> seen = new HashSet<String>();

        ExplainingSpec<DaemonContext> spec = new ExplainingSpec<DaemonContext>() {
            @Override
            public String whyUnsatisfied(DaemonContext element) {
                return "already seen";
            }

            @Override
            public boolean isSatisfiedBy(DaemonContext element) {
                return !seen.contains(element.getUid());
            }

        final int id = registry.getAll().size() + 1
        final long lastIdleTime = lastIdle == -1L ? id * 1000 : lastIdle;
        Address daemonAddress = createAddress(id)
        DaemonContext context = Mock(DaemonContext) {
            _ * getUid() >> uid
        }
        DaemonInfo info = new DaemonInfo(daemonAddress, context, "password".bytes, Busy, new MockClock(lastIdleTime))
        info.setState(state)