@Override
    protected DefaultLockOptions options() {
        return DefaultLockOptions.mode(FileLockManager.LockMode.OnDemand).useCrossVersionImplementation()
    }

    void isVersionLockFile(TestFile lockFile, boolean dirty) {
        assert lockFile.isFile()
        assert lockFile.length() == 2
        lockFile.withDataInputStream { str ->
            assert str.readByte() == 1

        when:
        def lock = createLock(Exclusive)
        lock.close()

        then:
        lock.isLockFile(testFileLock)

        and:
        isVersionLockFile(testFileLock, true)
    }

    def "leaves empty lock file after shared lock on new file closed"() {
        when:
        def lock = createLock(Shared)
        lock.close()

        then:

        then:
        lock.unlockedCleanly
        lock.state.hasBeenUpdatedSince(state)

        where:
        lockMode << [Exclusive, Shared]
    }

    void isVersionLockFile(TestFile lockFile, boolean dirty) {
        assert lockFile.isFile()
        assert lockFile.length() <= 2048
        lockFile.withDataInputStream { str ->
            // state version + creation number + sequence number