### Question:
FileUtil { public static boolean mkdir(final File file) { boolean mkdir = file.mkdir(); handle(mkdir, file); return mkdir; } private  FileUtil(); static File getSystemTempFolder(); static File getTmpFile(final String name, final String suffix); static File getTmpFile(final byte[] data, final String name,
            final String suffix); static boolean deleteTempFiles(final File workFolder); static void close(final Closeable out); static boolean mkdir(final File file); static boolean mkdirs(final File file); static String makePath(String... parts); static final String JAVA_TMP; }### Answer:
@Test public void testMkdir() { }