given:
        JavaAppStartScriptGenerationDetails details = createScriptGenerationDetails(null, 'bin')
        Writer destination = new StringWriter()

        when:
        generator.generateScript(details, destination)

        then:
        destination.toString().contains("CLASSPATH=\$APP_HOME/path/to/Jar.jar")
    }

    def "unix script uses unix line separator"() {
        given:

        given:
        JavaAppStartScriptGenerationDetails details = createScriptGenerationDetails(null, 'bin')
        Writer destination = new StringWriter()

        when:
        generator.generateScript(details, destination)

        then:
        destination.toString().contains("set CLASSPATH=%APP_HOME%\\path\\to\\Jar.jar")
    }

    def "windows script uses windows line separator"() {
        given:

        when:
        startScriptGenerator.generateUnixScript(script)

        then:
        1 * unixStartScriptGenerator.generateScript(createJavaAppStartScriptGenerationDetails(), _ as Writer)
        0 * windowsStartScriptGenerator.generateScript(_, _)
        1 * unixFileOperation.createExecutablePermission(script)
    }

    def "can generate Windows script"() {
        given:

 * }
 *
 * class CustomUnixStartScriptGenerator implements ScriptGenerator {
 *   void generateScript(JavaAppStartScriptGenerationDetails details, Writer destination) {
 *     // implementation
 *   }
 * }
 *
 * class CustomWindowsStartScriptGenerator implements ScriptGenerator {
 *   void generateScript(JavaAppStartScriptGenerationDetails details, Writer destination) {
 *     // implementation
 *   }
 * }

     * It is the responsibility of the caller to close the stream.
     *
     * @param details the application details
     * @param destination the script destination
     */
    void generateScript(JavaAppStartScriptGenerationDetails details, Writer destination);

 * }
 *
 * class CustomUnixStartScriptGenerator implements ScriptGenerator {
 *   void generateScript(JavaAppStartScriptGenerationDetails details, Writer destination) {
 *     // implementation
 *   }
 * }
 *
 * class CustomWindowsStartScriptGenerator implements ScriptGenerator {
 *   void generateScript(JavaAppStartScriptGenerationDetails details, Writer destination) {
 *     // implementation
 *   }
 * }

        this.lineSeparator = lineSeparator;
        this.bindingFactory = bindingFactory;
        this.template = template;
    }

    @Override
    public void generateScript(JavaAppStartScriptGenerationDetails details, Writer destination) {
        try {
            Map<String, String> binding = bindingFactory.transform(details);

            this.unixStartScriptGenerator = unixStartScriptGenerator;
        }

        @Override
        public void execute(BufferedWriter writer) {
            unixStartScriptGenerator.generateScript(startScriptGenerationDetails, writer);
        }
    }

}

class CustomUnixStartScriptGenerator implements ScriptGenerator {
    void generateScript(JavaAppStartScriptGenerationDetails details, Writer destination) {
        destination << "\${details.applicationName} start up script for UN*X"
    }
}

class CustomWindowsStartScriptGenerator implements ScriptGenerator {
    void generateScript(JavaAppStartScriptGenerationDetails details, Writer destination) {