### Question:
XSLTHelper { public static String indent() { final StringBuilder result = new StringBuilder(Math.max(0, s_indentString.length() * s_indentLevel)); for (int i = 0; i < s_indentLevel; ++i) { result.append(s_indentString); } return result.toString(); } XSLTHelper(); static String formatTime(String iso8601); static String quoteForPython(String value); static String quoteEOLEscapedStringForPython(String value); static String quoteForClojure(String value); static String quoteEOLEscapedStringForClojure(String value); static String summariseAsLine(String value, int maximumCharacters); static String escape(String value); static String indent(); static String newLine(); static String newLineAndIndent(); static String changeIndent(int indentChange); static String resetIndent(); static String base64ToPython(String base64String); static String base64ToClojure(String base64String); static void setIndentString(String indentString);  }### Answer:
@Test public void testIndent() throws Exception { assertEquals("", XSLTHelper.indent()); XSLTHelper.changeIndent(2); assertEquals(" ", XSLTHelper.indent()); XSLTHelper.setIndentString("\t"); assertEquals("\t\t", XSLTHelper.indent()); }