public File newFolder()

in src/main/java/org/junit/rules/TemporaryFolder.java [184:223]
33 lines of code
9 McCabe index (conditional complexity)

    public File newFolder(String... paths) throws IOException {
        if (paths.length == 0) {
            throw new IllegalArgumentException("must pass at least one path");
        }

        /*
         * Before checking if the paths are absolute paths, check if create() was ever called,
         * and if it wasn't, throw IllegalStateException.
         */
        File root = getRoot();
        for (String path : paths) {
            if (new File(path).isAbsolute()) {
                throw new IOException("folder path \'" + path + "\' is not a relative path");
            }
        }

        File relativePath = null;
        File file = root;
        boolean lastMkdirsCallSuccessful = true;
        for (String path : paths) {
            relativePath = new File(relativePath, path);
            file = new File(root, relativePath.getPath());

            lastMkdirsCallSuccessful = file.mkdirs();
            if (!lastMkdirsCallSuccessful && !file.isDirectory()) {
                if (file.exists()) {
                    throw new IOException(
                            "a file with the path \'" + relativePath.getPath() + "\' exists");
                } else {
                    throw new IOException(
                            "could not create a folder with the path \'" + relativePath.getPath() + "\'");
                }
            }
        }
        if (!lastMkdirsCallSuccessful) {
            throw new IOException(
                    "a folder with the path \'" + relativePath.getPath() + "\' already exists");
        }
        return file;
    }