The fragment of JPackageCommand.outputBundle() function at https://github.com/openjdk/jdk/blame/236c71cad9fa269518456c11edcfb353bbfc084d/test/jdk/tools/jpackage/helpers/jdk/jpackage/test/JPackageCommand.java#L402 is as follows:

/**
     * Returns path to output bundle of configured jpackage command.
     *
     * If this is build image command, returns path to application image directory.
     *
     * Special case for masOS. If this is sign app image command, returns value
     * of "--app-image".
     */
    public Path outputBundle() {
        final String bundleName;
        if (isImagePackageType()) {
            if (TKit.isOSX() && hasArgument("--app-image")) {
                return Path.of(getArgumentValue("--app-image", () -> null));
            }
            ...

The javadoc states that if jpackage signs an app image on OSX, the function should return the value of the "--app-image" parameter.

However, the code does not check for the presence of the "--mac-sign" parameter. Instead, it tests for the "--app-image" parameter. Is this a typo?

The changes to JPackageCommand.outputBundle() function were introduced in JDK-8293462 patch.

Should it be like this:
---
if (TKit.isOSX() && hasArgument("--mac-sign")) {
  return getArgumentValue("--app-image", () -> null, Path::of);
}
---
?