doclet = optionFile.getOption(OPTION_DOCLET);
        docletpath = optionFile.getOption(OPTION_DOCLETPATH);
        source = optionFile.getOption(OPTION_SOURCE);
        classpath = optionFile.getOption(OPTION_CLASSPATH);
        modulePath = optionFile.getOption(OPTION_MODULE_PATH);
        bootClasspath = optionFile.getOption(OPTION_BOOTCLASSPATH);
        extDirs = optionFile.getOption(OPTION_EXTDIRS);

    JavadocOptionFile optionfile = Mock()
    JavadocOptionFileWriter javadocOptionFileWriter = new JavadocOptionFileWriter(optionfile)

    def "writes locale option first if set"() {
        setup:
        def tempFile = temporaryFolder.createFile("optionFile")
        def optionsMap = createOptionsMap()
        when:
        _ * optionfile.options >> optionsMap

    def optionFileOptionMock = Mock(JavadocOptionFileOptionInternal.class)
    def optionFile = new JavadocOptionFile()

    def "test defaults"() {
        expect:
        optionFile.getOptions() != null
        optionFile.getOptions().isEmpty()

        optionFile.getSourceNames() != null
        optionFile.getSourceNames().getValue() != null
        optionFile.getSourceNames().getValue().isEmpty()
    }

    def "test addOption"() {

import java.util.TreeMap;

public class JavadocOptionFileWriter {
    private final JavadocOptionFile optionFile;

    public JavadocOptionFileWriter(JavadocOptionFile optionFile) {
        if (optionFile == null) {
            throw new IllegalArgumentException("optionFile == null!");
        }
        this.optionFile = optionFile;
    }

    void write(File outputFile) throws IOException {

        use = optionFile.getOption(OPTION_USE);
        version = optionFile.getOption(OPTION_VERSION);
        author = optionFile.getOption(OPTION_AUTHOR);
        splitIndex = optionFile.getOption(OPTION_SPLITINDEX);
        header = optionFile.getOption(OPTION_HEADER);
        windowTitle = optionFile.getOption(OPTION_WINDOWTITLE);
        docTitle = optionFile.getOption(OPTION_DOCTITLE);

    }

    public void write(File optionFile) throws IOException {
        if (optionFile == null) {
            throw new IllegalArgumentException("optionFile == null!");
        }

        final JavadocOptionFileWriter optionFileWriter = new JavadocOptionFileWriter(this);

        optionFileWriter.write(optionFile);
    }

        }

        this.options = options;
        return this;
    }

    public JavadocExecHandleBuilder optionsFile(File optionsFile) {
        this.optionsFile = optionsFile;
        return this;
    }

    public ExecAction getExecHandle() {
        try {
            options.write(optionsFile);
        } catch (IOException e) {
            throw new GradleException("Failed to store javadoc options.", e);
        }

        this.homeDir = homeDir;
    }

    public File getHomeDir() {
        return homeDir;
    }

    public void setOptionsFile(File optionsFile) {
        this.optionsFile = optionsFile;
    }

    public File getOptionsFile() {
        return optionsFile;
    }

    public void setKeyName(String keyName) {
        this.keyName = keyName;
    }

    public String getKeyName() {

        } finally {
            // Try to clean-up generated options file
            if (optionsFile != null) {
                optionsFile.toFile().delete();
            }
        }
    }

    private List<String> generateArgList(ScaladocParameters parameters, Path optionsFile) {
        List<String> args = new ArrayList<>();
        args.add("-d");

        this.workingDir = workingDir;
    }

    public File getWorkingDir() {
        return workingDir;
    }

    public void setOptionsFile(File optionsFile) {
        this.optionsFile = optionsFile;
    }

    public File getOptionsFile() {
        return optionsFile;
    }

    public void setExecutable(@Nullable String executable) {
        this.executable = executable;
    }

    @Nullable