PathHelper { public static String getParent(final String path) { final int i = path.lastIndexOf('/'); if (i == -1) return ""; if (i == 0) return "/"; return path.substring(0, i); } private  PathHelper(); static boolean isValid(final String path); static boolean isRelative(final String path); static String getParent(final String path); static String getFileName(final String path); static String getExtension(final String path); static String removeExtension(final String path); static String replaceExtension(final String path, String extension); static String toAbsolute(String dirName, String path); static String fullyQualifiedNameToDirName(
      final String fullyQualifiedName); static String packageNameToDirName(final String packageName); static String fullyQualifiedNameToAbsolute(
      final String fullyQualifiedName, final String path); static String packageNameToAbsolute(final String packageName,
      final String path); static String fullyQualifiedNameToPath(
      final String fullyQualifiedName, final String extension); static String fullyQualifiedNameToPath(
      final String fullyQualifiedName, final String suffix,
      final String extension); static final String PATH_REGEXP; }
@Test(groups = {"functional"}) public void testGetParent() throws Exception { assertEquals("foo", getParent("foo/bar.txt")); assertEquals("foo/toto", getParent("foo/toto/bar.txt")); assertEquals("", getParent("bar.txt")); }