### Question:
FileUtils { public static String escapeFilename(String s) { return s.replace(" ", "\\ "); } FileUtils();  FileUtils(String workingDirectory); void wget(String urlString); void copy(InputStream source, String destinationFileName); String parseFileName(String urlString); String parseDirectory(String urlString); String parseFileNameMinusExtension(String urlString); String parseBucket(String s3path); String parseKey(String s3path); int tarzxf(String tarFile); int chmod(String permissions, String destinationFileName); void copyFiles(File from, File to); String createTmpDirectory(); int unzip(String zipFileName, String outputDirectory); void createFile(String fileName, StringBuffer contents); int tarcvf(String baseDir, String[] paths, String filename); static void copyFile(File srcFile, File destFile); InputStream read(String filename); static String escapeFilename(String s); static void debugCmds(String[] array);  }### Answer:
@Test public void testEscapeFilename() { assertEquals("google\\ transit\\ brooklyn.zip", FileUtils.escapeFilename("google transit brooklyn.zip")); }