freemarker-core/src/test/java/freemarker/template/utility/StringUtilTest.java - freemarker - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *   http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  */

 package freemarker.template.utility;

 import static freemarker.template.utility.StringUtil.JsStringEncCompatibility.*;
 import static freemarker.template.utility.StringUtil.JsStringEncQuotation.*;
 import static org.hamcrest.Matchers.*;
 import static org.junit.Assert.*;

 import java.io.IOException;
 import java.io.StringWriter;
 import java.util.regex.Pattern;

 import org.hamcrest.Matchers;
 import org.junit.Test;

 import freemarker.core.ParseException;
 import freemarker.template.utility.StringUtil.JsStringEncCompatibility;

 public class StringUtilTest {

     @Test
     public void testJavaScriptStringEncV2319() {
         assertEquals("\\n\\r\\f\\b\\t\\x00\\x19", StringUtil.javaScriptStringEnc("\n\r\f\b\t\u0000\u0019"));
     }

     @Test
     public void testControlChars() {
         assertEsc(
                 "\n\r\f\b\t \u0000\u0019\u001F \u007F\u0080\u009F \u2028\u2029",
                 "\\n\\r\\f\\b\\t \\x00\\x19\\x1F \\x7F\\x80\\x9F \\u2028\\u2029",
                 "\\n\\r\\f\\b\\t \\u0000\\u0019\\u001F \\u007F\\u0080\\u009F \\u2028\\u2029");
     }

     @Test
     public void testHtmlChars() {
         assertEsc(
                 "<safe>/>->]> </foo> <!-- --> <![CDATA[ ]]> <?php?>",
                 "<safe>/>->]> <\\/foo> \\x3C!-- --\\> \\x3C![CDATA[ ]]\\> \\x3C?php?>",
                 "<safe>/>->]> <\\/foo> \\u003C!-- --\\u003E \\u003C![CDATA[ ]]\\u003E \\u003C?php?>");
         assertEsc("<!c", "\\x3C!c", "\\u003C!c");
         assertEsc("c<!", "c\\x3C!", "c\\u003C!");
         assertEsc("c<", "c\\x3C", "c\\u003C");
         assertEsc("c<c", "c<c", "c<c");
         assertEsc("<c", "<c", "<c");
         assertEsc(">", "\\>", "\\u003E");
         assertEsc("->", "-\\>", "-\\u003E");
         assertEsc("-->", "--\\>", "--\\u003E");
         assertEsc("c-->", "c--\\>", "c--\\u003E");
         assertEsc("-->c", "--\\>c", "--\\u003Ec");
         assertEsc("]>", "]\\>", "]\\u003E");
         assertEsc("]]>", "]]\\>", "]]\\u003E");
         assertEsc("c]]>", "c]]\\>", "c]]\\u003E");
         assertEsc("]]>c", "]]\\>c", "]]\\u003Ec");
         assertEsc("c->", "c->", "c->");
         assertEsc("c>", "c>", "c>");
         assertEsc("-->", "--\\>", "--\\u003E");
         assertEsc("/", "\\/", "\\/");
         assertEsc("/c", "\\/c", "\\/c");
         assertEsc("</", "<\\/", "<\\/");
         assertEsc("</c", "<\\/c", "<\\/c");
         assertEsc("c/", "c/", "c/");
     }

     @Test
     public void testJSChars() {
         assertEsc("\"", "\\\"", "\\\"");
         assertEsc("'", "\\'", "'");
         assertEsc("\\", "\\\\", "\\\\");
     }

     @Test
     public void testSameStringsReturned() {
         String s = "==> I/m <safe>!";
         assertTrue(s == StringUtil.jsStringEnc(s, false));  // "==" because is must return the same object
         assertTrue(s == StringUtil.jsStringEnc(s, true));

         s = "";
         assertTrue(s == StringUtil.jsStringEnc(s, false));
         assertTrue(s == StringUtil.jsStringEnc(s, true));

         s = "\u00E1rv\u00EDzt\u0171r\u0151 \u3020";
         assertEquals(s, StringUtil.jsStringEnc(s, false));
         assertTrue(s == StringUtil.jsStringEnc(s, false));
         assertTrue(s == StringUtil.jsStringEnc(s, true));
     }

     @Test
     public void testOneOffs() {
         assertEsc("c\"c\"cc\"\"c", "c\\\"c\\\"cc\\\"\\\"c", "c\\\"c\\\"cc\\\"\\\"c");
         assertEsc("\"c\"cc\"", "\\\"c\\\"cc\\\"", "\\\"c\\\"cc\\\"");
         assertEsc("c/c/cc//c", "c/c/cc//c", "c/c/cc//c");
         assertEsc("c<c<cc<<c", "c<c<cc<<c", "c<c<cc<<c");
         assertEsc("/<", "\\/\\x3C", "\\/\\u003C");
         assertEsc(">", "\\>", "\\u003E");
         assertEsc("]>", "]\\>", "]\\u003E");
         assertEsc("->", "-\\>", "-\\u003E");
     }

     @Test
     public void testFTLEscaping() {
         assertFTLEsc("", "", "", "", "\"\"");
         assertFTLEsc("\'", "\\'", "'", "\\'", "\"'\"");
         assertFTLEsc("\"", "\\\"", "\\\"", "\"", "'\"'");
         assertFTLEsc("\"", "\\\"", "\\\"", "\"", "'\"'");
         assertFTLEsc("foo", "foo", "foo", "foo", "\"foo\"");
         assertFTLEsc("foo's", "foo\\'s", "foo's", "foo\\'s", "\"foo's\"");
         assertFTLEsc("foo \"", "foo \\\"", "foo \\\"", "foo \"", "'foo \"'");
         assertFTLEsc("foo's \"", "foo\\'s \\\"", "foo's \\\"", "foo\\'s \"", "\"foo's \\\"\"");
         assertFTLEsc("foo\nb\u0000c", "foo\\nb\\x0000c", "foo\\nb\\x0000c", "foo\\nb\\x0000c", "\"foo\\nb\\x0000c\"");
     }

     private void assertEsc(String s, String javaScript, String json) {
         assertEquals(javaScript, StringUtil.jsStringEnc(s, false));
         assertEquals(json, StringUtil.jsStringEnc(s, true));
     }

     private void assertFTLEsc(String s, String partAny, String partQuot, String partApos, String quoted) {
         assertEquals(partAny, StringUtil.FTLStringLiteralEnc(s));
         assertEquals(partQuot, StringUtil.FTLStringLiteralEnc(s, '\"'));
         assertEquals(partApos, StringUtil.FTLStringLiteralEnc(s, '\''));
         assertEquals(quoted, StringUtil.ftlQuote(s));
     }

     @Test
     public void testTrim() {
         assertSame(CollectionUtils.EMPTY_CHAR_ARRAY, StringUtil.trim(CollectionUtils.EMPTY_CHAR_ARRAY));
         assertSame(CollectionUtils.EMPTY_CHAR_ARRAY, StringUtil.trim(" \t\u0001 ".toCharArray()));
         {
             char[] cs = "foo".toCharArray();
             assertSame(cs, cs);
         }
         assertArrayEquals("foo".toCharArray(), StringUtil.trim("foo ".toCharArray()));
         assertArrayEquals("foo".toCharArray(), StringUtil.trim(" foo".toCharArray()));
         assertArrayEquals("foo".toCharArray(), StringUtil.trim(" foo ".toCharArray()));
         assertArrayEquals("foo".toCharArray(), StringUtil.trim("\t\tfoo \r\n".toCharArray()));
         assertArrayEquals("x".toCharArray(), StringUtil.trim(" x ".toCharArray()));
         assertArrayEquals("x y z".toCharArray(), StringUtil.trim(" x y z ".toCharArray()));
     }

     @Test
     public void testIsTrimmedToEmpty() {
         assertTrue(StringUtil.isTrimmableToEmpty("".toCharArray()));
         assertTrue(StringUtil.isTrimmableToEmpty("\r\r\n\u0001".toCharArray()));
         assertFalse(StringUtil.isTrimmableToEmpty("x".toCharArray()));
         assertFalse(StringUtil.isTrimmableToEmpty("  x  ".toCharArray()));
     }

     @Test
     public void testJQuote() {
         assertEquals("null", StringUtil.jQuote(null));
         assertEquals("\"foo\"", StringUtil.jQuote("foo"));
         assertEquals("\"123\"", StringUtil.jQuote(Integer.valueOf(123)));
         assertEquals("\"foo's \\\"bar\\\"\"",
                 StringUtil.jQuote("foo's \"bar\""));
         assertEquals("\"\\n\\r\\t\\u0001\"",
                 StringUtil.jQuote("\n\r\t\u0001"));
         assertEquals("\"<\\nb\\rc\\td\\u0001>\"",
                 StringUtil.jQuote("<\nb\rc\td\u0001>"));
     }

     @Test
     public void testJQuoteNoXSS() {
         assertEquals("null", StringUtil.jQuoteNoXSS(null));
         assertEquals("\"foo\"", StringUtil.jQuoteNoXSS("foo"));
         assertEquals("\"123\"", StringUtil.jQuoteNoXSS(Integer.valueOf(123)));
         assertEquals("\"foo's \\\"bar\\\"\"",
                 StringUtil.jQuoteNoXSS("foo's \"bar\""));
         assertEquals("\"\\n\\r\\t\\u0001\"",
                 StringUtil.jQuoteNoXSS("\n\r\t\u0001"));
         assertEquals("\"\\u003C\\nb\\rc\\td\\u0001>\"",
                 StringUtil.jQuoteNoXSS("<\nb\rc\td\u0001>"));
         assertEquals("\"\\u003C\\nb\\rc\\td\\u0001>\"",
                 StringUtil.jQuoteNoXSS((Object) "<\nb\rc\td\u0001>"));
     }

     @Test
     public void testFTLStringLiteralEnc() {
         assertEquals("", StringUtil.FTLStringLiteralEnc(""));
         assertEquals("abc", StringUtil.FTLStringLiteralEnc("abc"));
         assertEquals("{", StringUtil.FTLStringLiteralEnc("{"));
         assertEquals("a{b}c", StringUtil.FTLStringLiteralEnc("a{b}c"));
         assertEquals("a#b", StringUtil.FTLStringLiteralEnc("a#b"));
         assertEquals("a$b", StringUtil.FTLStringLiteralEnc("a$b"));
         assertEquals("a#\\{b}c", StringUtil.FTLStringLiteralEnc("a#{b}c"));
         assertEquals("a$\\{b}c", StringUtil.FTLStringLiteralEnc("a${b}c"));
         assertEquals("a'c\\\"d", StringUtil.FTLStringLiteralEnc("a'c\"d", '"'));
         assertEquals("a\\'c\"d", StringUtil.FTLStringLiteralEnc("a'c\"d", '\''));
         assertEquals("a\\'c\"d", StringUtil.FTLStringLiteralEnc("a'c\"d", '\''));
         assertEquals("\\n\\r\\t\\f\\x0002\\\\", StringUtil.FTLStringLiteralEnc("\n\r\t\f\u0002\\"));
         assertEquals("\\l\\g\\a", StringUtil.FTLStringLiteralEnc("<>&"));
         assertEquals("=[\\=]=", StringUtil.FTLStringLiteralEnc("=[=]="));
         assertEquals("[\\=", StringUtil.FTLStringLiteralEnc("[="));
     }

     @Test
     public void testFTLStringLiteralDec() throws ParseException {
         assertEquals("", StringUtil.FTLStringLiteralDec(""));
         assertEquals("x", StringUtil.FTLStringLiteralDec("x"));
         assertEquals("\nq", StringUtil.FTLStringLiteralDec("\\x0Aq"));
         assertEquals("\n\r1", StringUtil.FTLStringLiteralDec("\\x0A\\x000D1"));
         assertEquals("\n\r\t", StringUtil.FTLStringLiteralDec("\\n\\r\\t"));
         assertEquals("${1}#{2}[=3]", StringUtil.FTLStringLiteralDec("$\\{1}#\\{2}[\\=3]"));
         assertEquals("{=", StringUtil.FTLStringLiteralDec("\\{\\="));
         assertEquals("\\=", StringUtil.FTLStringLiteralDec("\\\\="));

         try {
             StringUtil.FTLStringLiteralDec("\\[");
             fail();
         } catch (ParseException e) {
             assertThat(e.getMessage(), containsString("\\["));
         }
     }

     @Test
     public void testGlobToRegularExpression() {
         assertGlobMatches("a/b/c.ftl", "a/b/c.ftl");
         assertGlobDoesNotMatch("/a/b/cxftl", "/a/b/c.ftl", "a/b/C.ftl");

         assertGlobMatches("a/b/*.ftl", "a/b/.ftl", "a/b/x.ftl", "a/b/xx.ftl");
         assertGlobDoesNotMatch("a/b/*.ftl", "a/c/x.ftl", "a/b/c/x.ftl", "/a/b/x.ftl", "a/b/xxftl");

         assertGlobMatches("a/b/?.ftl", "a/b/x.ftl");
         assertGlobDoesNotMatch("a/b/?.ftl", "a/c/x.ftl", "a/b/.ftl", "a/b/xx.ftl", "a/b/xxftl");

         assertGlobMatches("a/**/c.ftl", "a/b/c.ftl", "a/c.ftl", "a/b/b2/b3/c.ftl", "a//c.ftl");
         assertGlobDoesNotMatch("a/**/c.ftl", "x/b/c.ftl", "a/b/x.ftl");

         assertGlobMatches("**/c.ftl", "a/b/c.ftl", "c.ftl", "/c.ftl", "///c.ftl");
         assertGlobDoesNotMatch("**/c.ftl", "a/b/x.ftl");

         assertGlobMatches("a/b/**", "a/b/c.ftl", "a/b/c2/c.ftl", "a/b/", "a/b/c/");
         assertGlobDoesNotMatch("a/b.ftl");

         assertGlobMatches("**", "a/b/c.ftl", "");

         assertGlobMatches("\\[\\{\\*\\?\\}\\]\\\\", "[{*?}]\\");
         assertGlobDoesNotMatch("\\[\\{\\*\\?\\}\\]\\\\", "[{xx}]\\");

         assertGlobMatches("a/b/\\?.ftl", "a/b/?.ftl");
         assertGlobDoesNotMatch("a/b/\\?.ftl", "a/b/x.ftl");

         assertGlobMatches("\\?\\?.ftl", "??.ftl");
         assertGlobMatches("\\\\\\\\", "\\\\");
         assertGlobMatches("\\\\\\\\?", "\\\\x");
         assertGlobMatches("x\\", "x");

         assertGlobMatches("???*", "123", "1234", "12345");
         assertGlobDoesNotMatch("???*", "12", "1", "");

         assertGlobMatches("**/a??/b*.ftl", "a11/b1.ftl", "x/a11/b123.ftl", "x/y/a11/b.ftl");
         assertGlobDoesNotMatch("**/a??/b*.ftl", "a1/b1.ftl", "x/a11/c123.ftl");

         assertFalse(StringUtil.globToRegularExpression("ab*").matcher("aBc").matches());
         assertTrue(StringUtil.globToRegularExpression("ab*", true).matcher("aBc").matches());
         assertTrue(StringUtil.globToRegularExpression("ab", true).matcher("aB").matches());
         assertTrue(StringUtil.globToRegularExpression("\u00E1b*", true).matcher("\u00C1bc").matches());

         try {
             StringUtil.globToRegularExpression("x**/y");
             fail();
         } catch (IllegalArgumentException e) {
             assertThat(e.getMessage(), Matchers.containsString("**"));
         }

         try {
             StringUtil.globToRegularExpression("**y");
             fail();
         } catch (IllegalArgumentException e) {
             assertThat(e.getMessage(), Matchers.containsString("**"));
         }

         try {
             StringUtil.globToRegularExpression("[ab]c");
             fail();
         } catch (IllegalArgumentException e) {
             assertThat(e.getMessage(), Matchers.containsString("unsupported"));
         }

         try {
             StringUtil.globToRegularExpression("{aa,bb}c");
             fail();
         } catch (IllegalArgumentException e) {
             assertThat(e.getMessage(), Matchers.containsString("unsupported"));
         }
     }

     private void assertGlobMatches(String glob, String... ss) {
         Pattern pattern = StringUtil.globToRegularExpression(glob);
         for (String s : ss) {
             if (!pattern.matcher(s).matches()) {
                 fail("Glob " + glob + " (regexp: " + pattern + ") doesn't match " + s);
             }
         }
     }

     private void assertGlobDoesNotMatch(String glob, String... ss) {
         Pattern pattern = StringUtil.globToRegularExpression(glob);
         for (String s : ss) {
             if (pattern.matcher(s).matches()) {
                 fail("Glob " + glob + " (regexp: " + pattern + ") matches " + s);
             }
         }
     }

     @Test
     public void testHTMLEnc() {
         String s = "";
         assertSame(s, StringUtil.HTMLEnc(s));

         s = "asd";
         assertSame(s, StringUtil.HTMLEnc(s));

         assertEquals("a&amp;b&lt;c&gt;d&quot;e'f", StringUtil.HTMLEnc("a&b<c>d\"e'f"));
         assertEquals("&lt;", StringUtil.HTMLEnc("<"));
         assertEquals("&lt;a", StringUtil.HTMLEnc("<a"));
         assertEquals("&lt;a&gt;", StringUtil.HTMLEnc("<a>"));
         assertEquals("a&gt;", StringUtil.HTMLEnc("a>"));
         assertEquals("&lt;&gt;", StringUtil.HTMLEnc("<>"));
         assertEquals("a&lt;&gt;b", StringUtil.HTMLEnc("a<>b"));
     }

     @Test
     public void testXHTMLEnc() throws IOException {
         String s = "";
         assertSame(s, StringUtil.XHTMLEnc(s));

         s = "asd";
         assertSame(s, StringUtil.XHTMLEnc(s));

         testXHTMLEnc("a&amp;b&lt;c&gt;d&quot;e&#39;f", "a&b<c>d\"e'f");
         testXHTMLEnc("&lt;", "<");
         testXHTMLEnc("&lt;a", "<a");
         testXHTMLEnc("&lt;a&gt;", "<a>");
         testXHTMLEnc("a&gt;", "a>");
         testXHTMLEnc("&lt;&gt;", "<>");
         testXHTMLEnc("a&lt;&gt;b", "a<>b");
     }

     private void testXHTMLEnc(String expected, String in) throws IOException {
         assertEquals(expected, StringUtil.XHTMLEnc(in));

         StringWriter sw = new StringWriter();
         StringUtil.XHTMLEnc(in, sw);
         assertEquals(expected, sw.toString());
     }

     @Test
     public void testXMLEnc() throws IOException {
         String s = "";
         assertSame(s, StringUtil.XMLEnc(s));

         s = "asd";
         assertSame(s, StringUtil.XMLEnc(s));

         testXMLEnc("a&amp;b&lt;c&gt;d&quot;e&apos;f", "a&b<c>d\"e'f");
         testXMLEnc("&lt;", "<");
         testXMLEnc("&lt;a", "<a");
         testXMLEnc("&lt;a&gt;", "<a>");
         testXMLEnc("a&gt;", "a>");
         testXMLEnc("&lt;&gt;", "<>");
         testXMLEnc("a&lt;&gt;b", "a<>b");
     }

     private void testXMLEnc(String expected, String in) throws IOException {
         assertEquals(expected, StringUtil.XMLEnc(in));

         StringWriter sw = new StringWriter();
         StringUtil.XMLEnc(in, sw);
         assertEquals(expected, sw.toString());
     }

     @Test
     public void testXMLEncQAttr() throws IOException {
         String s = "";
         assertSame(s, StringUtil.XMLEncQAttr(s));

         s = "asd";
         assertSame(s, StringUtil.XMLEncQAttr(s));

         assertEquals("a&amp;b&lt;c>d&quot;e'f", StringUtil.XMLEncQAttr("a&b<c>d\"e'f"));
         assertEquals("&lt;", StringUtil.XMLEncQAttr("<"));
         assertEquals("&lt;a", StringUtil.XMLEncQAttr("<a"));
         assertEquals("&lt;a>", StringUtil.XMLEncQAttr("<a>"));
         assertEquals("a>", StringUtil.XMLEncQAttr("a>"));
         assertEquals("&lt;>", StringUtil.XMLEncQAttr("<>"));
         assertEquals("a&lt;>b", StringUtil.XMLEncQAttr("a<>b"));
     }

     @Test
     public void testXMLEncNQG() throws IOException {
         String s = "";
         assertSame(s, StringUtil.XMLEncNQG(s));

         s = "asd";
         assertSame(s, StringUtil.XMLEncNQG(s));

         assertEquals("a&amp;b&lt;c>d\"e'f", StringUtil.XMLEncNQG("a&b<c>d\"e'f"));
         assertEquals("&lt;", StringUtil.XMLEncNQG("<"));
         assertEquals("&lt;a", StringUtil.XMLEncNQG("<a"));
         assertEquals("&lt;a>", StringUtil.XMLEncNQG("<a>"));
         assertEquals("a>", StringUtil.XMLEncNQG("a>"));
         assertEquals("&lt;>", StringUtil.XMLEncNQG("<>"));
         assertEquals("a&lt;>b", StringUtil.XMLEncNQG("a<>b"));

         assertEquals("&gt;", StringUtil.XMLEncNQG(">"));
         assertEquals("]&gt;", StringUtil.XMLEncNQG("]>"));
         assertEquals("]]&gt;", StringUtil.XMLEncNQG("]]>"));
         assertEquals("x]]&gt;", StringUtil.XMLEncNQG("x]]>"));
         assertEquals("x]>", StringUtil.XMLEncNQG("x]>"));
         assertEquals("]x>", StringUtil.XMLEncNQG("]x>"));
     }

     @Test
     public void testRTFEnc() throws IOException {
         String s = "";
         assertSame(s, StringUtil.RTFEnc(s));

         s = "asd";
         assertSame(s, StringUtil.RTFEnc(s));

         testRTFEnc("a\\{b\\}c\\\\d", "a{b}c\\d");
         testRTFEnc("\\{", "{");
         testRTFEnc("\\{a", "{a");
         testRTFEnc("\\{a\\}", "{a}");
         testRTFEnc("a\\}", "a}");
         testRTFEnc("\\{\\}", "{}");
         testRTFEnc("a\\{\\}b", "a{}b");
     }

     private void testRTFEnc(String expected, String in) throws IOException {
         assertEquals(expected, StringUtil.RTFEnc(in));

         StringWriter sw = new StringWriter();
         StringUtil.RTFEnc(in, sw);
         assertEquals(expected, sw.toString());
     }

     @Test
     public void jsStringEncQuotationTests() {
         for (JsStringEncCompatibility anyCompatibility : JsStringEncCompatibility.values()) {
             JsStringEncCompatibility anyJsonCompatible = anyCompatibility.isJSONCompatible() ? anyCompatibility : JSON;

             assertEquals("", StringUtil.jsStringEnc("", anyCompatibility, null));
             assertEquals("''", StringUtil.jsStringEnc("", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"\"", StringUtil.jsStringEnc("", anyCompatibility, QUOTATION_MARK));

             assertEquals("a", StringUtil.jsStringEnc("a", anyCompatibility, null));
             assertEquals("a", StringUtil.jsStringEnc("a", anyCompatibility, null));
             assertEquals("'a'", StringUtil.jsStringEnc("a", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"a\"", StringUtil.jsStringEnc("a", anyCompatibility, QUOTATION_MARK));

             try {
                 StringUtil.jsStringEnc("", anyJsonCompatible, APOSTROPHE);
                 fail();
             } catch (IllegalArgumentException e) {
                 // expected
             }

             assertEquals("a\\'b", StringUtil.jsStringEnc("a'b", JAVA_SCRIPT, null));
             assertEquals("a'b", StringUtil.jsStringEnc("a'b", JSON, null));
             assertEquals("a\\u0027b", StringUtil.jsStringEnc("a'b", JAVA_SCRIPT_OR_JSON, null));
             assertEquals("'a\\'b'", StringUtil.jsStringEnc("a'b", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"a'b\"", StringUtil.jsStringEnc("a'b", anyCompatibility, QUOTATION_MARK));

             assertEquals("<\\/e>", StringUtil.jsStringEnc("</e>", anyCompatibility, null));
             assertEquals("'<\\/e>'", StringUtil.jsStringEnc("</e>", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"<\\/e>\"", StringUtil.jsStringEnc("</e>", anyCompatibility, QUOTATION_MARK));

             assertEquals("\\/e>", StringUtil.jsStringEnc("/e>", anyCompatibility, null));
             assertEquals("'/e>'", StringUtil.jsStringEnc("/e>", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"/e>\"", StringUtil.jsStringEnc("/e>", anyCompatibility, QUOTATION_MARK));

             assertEquals("\\>", StringUtil.jsStringEnc(">", JAVA_SCRIPT, null));
             assertEquals("\\u003E", StringUtil.jsStringEnc(">", JSON, null));
             assertEquals("'>'", StringUtil.jsStringEnc(">", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\">\"", StringUtil.jsStringEnc(">", anyCompatibility, QUOTATION_MARK));

             assertEquals("-\\>", StringUtil.jsStringEnc("->", JAVA_SCRIPT, null));
             assertEquals("-\\u003E", StringUtil.jsStringEnc("->", JSON, null));
             assertEquals("'->'", StringUtil.jsStringEnc("->", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"->\"", StringUtil.jsStringEnc("->", JAVA_SCRIPT, QUOTATION_MARK));

             assertEquals("--\\>", StringUtil.jsStringEnc("-->", JAVA_SCRIPT, null));
             assertEquals("--\\u003E", StringUtil.jsStringEnc("-->", anyJsonCompatible, null));
             assertEquals("'--\\>'", StringUtil.jsStringEnc("-->", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"--\\>\"", StringUtil.jsStringEnc("-->", JAVA_SCRIPT, QUOTATION_MARK));
             assertEquals("\"--\\u003E\"", StringUtil.jsStringEnc("-->", anyJsonCompatible, QUOTATION_MARK));

             assertEquals("x->", StringUtil.jsStringEnc("x->", anyCompatibility, null));
             assertEquals("'x->'", StringUtil.jsStringEnc("x->", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"x->\"", StringUtil.jsStringEnc("x->", anyCompatibility, QUOTATION_MARK));

             assertEquals("\\x3C", StringUtil.jsStringEnc("<", JAVA_SCRIPT, null));
             assertEquals("\\u003C", StringUtil.jsStringEnc("<", JSON, null));
             assertEquals("'<'", StringUtil.jsStringEnc("<", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"<\"", StringUtil.jsStringEnc("<", anyCompatibility, QUOTATION_MARK));

             assertEquals("\\x3C!", StringUtil.jsStringEnc("<!", JAVA_SCRIPT, null));
             assertEquals("\\u003C!", StringUtil.jsStringEnc("<!", JSON, null));
             assertEquals("'\\x3C!'", StringUtil.jsStringEnc("<!", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"\\x3C!\"", StringUtil.jsStringEnc("<!", JAVA_SCRIPT, QUOTATION_MARK));
             assertEquals("\"\\u003C!\"", StringUtil.jsStringEnc("<!", anyJsonCompatible, QUOTATION_MARK));

             assertEquals("<x", StringUtil.jsStringEnc("<x", anyCompatibility, null));
             assertEquals("'<x'", StringUtil.jsStringEnc("<x", JAVA_SCRIPT, APOSTROPHE));
             assertEquals("\"<x\"", StringUtil.jsStringEnc("<x", anyCompatibility, QUOTATION_MARK));
         }
     }

 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/

	package freemarker.template.utility;

	import static freemarker.template.utility.StringUtil.JsStringEncCompatibility.*;
	import static freemarker.template.utility.StringUtil.JsStringEncQuotation.*;
	import static org.hamcrest.Matchers.*;
	import static org.junit.Assert.*;

	import java.io.IOException;
	import java.io.StringWriter;
	import java.util.regex.Pattern;

	import org.hamcrest.Matchers;
	import org.junit.Test;

	import freemarker.core.ParseException;
	import freemarker.template.utility.StringUtil.JsStringEncCompatibility;

	public class StringUtilTest {

	@Test
	public void testJavaScriptStringEncV2319() {
	assertEquals("\\n\\r\\f\\b\\t\\x00\\x19", StringUtil.javaScriptStringEnc("\n\r\f\b\t\u0000\u0019"));
	}

	@Test
	public void testControlChars() {
	assertEsc(
	"\n\r\f\b\t \u0000\u0019\u001F \u007F\u0080\u009F \u2028\u2029",
	"\\n\\r\\f\\b\\t \\x00\\x19\\x1F \\x7F\\x80\\x9F \\u2028\\u2029",
	"\\n\\r\\f\\b\\t \\u0000\\u0019\\u001F \\u007F\\u0080\\u009F \\u2028\\u2029");
	}

	@Test
	public void testHtmlChars() {
	assertEsc(
	"<safe>/>->]> </foo> <!-- --> <![CDATA[ ]]> <?php?>",
	"<safe>/>->]> <\\/foo> \\x3C!-- --\\> \\x3C![CDATA[ ]]\\> \\x3C?php?>",
	"<safe>/>->]> <\\/foo> \\u003C!-- --\\u003E \\u003C![CDATA[ ]]\\u003E \\u003C?php?>");
	assertEsc("<!c", "\\x3C!c", "\\u003C!c");
	assertEsc("c<!", "c\\x3C!", "c\\u003C!");
	assertEsc("c<", "c\\x3C", "c\\u003C");
	assertEsc("c<c", "c<c", "c<c");
	assertEsc("<c", "<c", "<c");
	assertEsc(">", "\\>", "\\u003E");
	assertEsc("->", "-\\>", "-\\u003E");
	assertEsc("-->", "--\\>", "--\\u003E");
	assertEsc("c-->", "c--\\>", "c--\\u003E");
	assertEsc("-->c", "--\\>c", "--\\u003Ec");
	assertEsc("]>", "]\\>", "]\\u003E");
	assertEsc("]]>", "]]\\>", "]]\\u003E");
	assertEsc("c]]>", "c]]\\>", "c]]\\u003E");
	assertEsc("]]>c", "]]\\>c", "]]\\u003Ec");
	assertEsc("c->", "c->", "c->");
	assertEsc("c>", "c>", "c>");
	assertEsc("-->", "--\\>", "--\\u003E");
	assertEsc("/", "\\/", "\\/");
	assertEsc("/c", "\\/c", "\\/c");
	assertEsc("</", "<\\/", "<\\/");
	assertEsc("</c", "<\\/c", "<\\/c");
	assertEsc("c/", "c/", "c/");
	}

	@Test
	public void testJSChars() {
	assertEsc("\"", "\\\"", "\\\"");
	assertEsc("'", "\\'", "'");
	assertEsc("\\", "\\\\", "\\\\");
	}

	@Test
	public void testSameStringsReturned() {
	String s = "==> I/m <safe>!";
	assertTrue(s == StringUtil.jsStringEnc(s, false)); // "==" because is must return the same object
	assertTrue(s == StringUtil.jsStringEnc(s, true));

	s = "";
	assertTrue(s == StringUtil.jsStringEnc(s, false));
	assertTrue(s == StringUtil.jsStringEnc(s, true));

	s = "\u00E1rv\u00EDzt\u0171r\u0151 \u3020";
	assertEquals(s, StringUtil.jsStringEnc(s, false));
	assertTrue(s == StringUtil.jsStringEnc(s, false));
	assertTrue(s == StringUtil.jsStringEnc(s, true));
	}

	@Test
	public void testOneOffs() {
	assertEsc("c\"c\"cc\"\"c", "c\\\"c\\\"cc\\\"\\\"c", "c\\\"c\\\"cc\\\"\\\"c");
	assertEsc("\"c\"cc\"", "\\\"c\\\"cc\\\"", "\\\"c\\\"cc\\\"");
	assertEsc("c/c/cc//c", "c/c/cc//c", "c/c/cc//c");
	assertEsc("c<c<cc<<c", "c<c<cc<<c", "c<c<cc<<c");
	assertEsc("/<", "\\/\\x3C", "\\/\\u003C");
	assertEsc(">", "\\>", "\\u003E");
	assertEsc("]>", "]\\>", "]\\u003E");
	assertEsc("->", "-\\>", "-\\u003E");
	}

	@Test
	public void testFTLEscaping() {
	assertFTLEsc("", "", "", "", "\"\"");
	assertFTLEsc("\'", "\\'", "'", "\\'", "\"'\"");
	assertFTLEsc("\"", "\\\"", "\\\"", "\"", "'\"'");
	assertFTLEsc("\"", "\\\"", "\\\"", "\"", "'\"'");
	assertFTLEsc("foo", "foo", "foo", "foo", "\"foo\"");
	assertFTLEsc("foo's", "foo\\'s", "foo's", "foo\\'s", "\"foo's\"");
	assertFTLEsc("foo \"", "foo \\\"", "foo \\\"", "foo \"", "'foo \"'");
	assertFTLEsc("foo's \"", "foo\\'s \\\"", "foo's \\\"", "foo\\'s \"", "\"foo's \\\"\"");
	assertFTLEsc("foo\nb\u0000c", "foo\\nb\\x0000c", "foo\\nb\\x0000c", "foo\\nb\\x0000c", "\"foo\\nb\\x0000c\"");
	}

	private void assertEsc(String s, String javaScript, String json) {
	assertEquals(javaScript, StringUtil.jsStringEnc(s, false));
	assertEquals(json, StringUtil.jsStringEnc(s, true));
	}

	private void assertFTLEsc(String s, String partAny, String partQuot, String partApos, String quoted) {
	assertEquals(partAny, StringUtil.FTLStringLiteralEnc(s));
	assertEquals(partQuot, StringUtil.FTLStringLiteralEnc(s, '\"'));
	assertEquals(partApos, StringUtil.FTLStringLiteralEnc(s, '\''));
	assertEquals(quoted, StringUtil.ftlQuote(s));
	}

	@Test
	public void testTrim() {
	assertSame(CollectionUtils.EMPTY_CHAR_ARRAY, StringUtil.trim(CollectionUtils.EMPTY_CHAR_ARRAY));
	assertSame(CollectionUtils.EMPTY_CHAR_ARRAY, StringUtil.trim(" \t\u0001 ".toCharArray()));
	{
	char[] cs = "foo".toCharArray();
	assertSame(cs, cs);
	}
	assertArrayEquals("foo".toCharArray(), StringUtil.trim("foo ".toCharArray()));
	assertArrayEquals("foo".toCharArray(), StringUtil.trim(" foo".toCharArray()));
	assertArrayEquals("foo".toCharArray(), StringUtil.trim(" foo ".toCharArray()));
	assertArrayEquals("foo".toCharArray(), StringUtil.trim("\t\tfoo \r\n".toCharArray()));
	assertArrayEquals("x".toCharArray(), StringUtil.trim(" x ".toCharArray()));
	assertArrayEquals("x y z".toCharArray(), StringUtil.trim(" x y z ".toCharArray()));
	}

	@Test
	public void testIsTrimmedToEmpty() {
	assertTrue(StringUtil.isTrimmableToEmpty("".toCharArray()));
	assertTrue(StringUtil.isTrimmableToEmpty("\r\r\n\u0001".toCharArray()));
	assertFalse(StringUtil.isTrimmableToEmpty("x".toCharArray()));
	assertFalse(StringUtil.isTrimmableToEmpty(" x ".toCharArray()));
	}

	@Test
	public void testJQuote() {
	assertEquals("null", StringUtil.jQuote(null));
	assertEquals("\"foo\"", StringUtil.jQuote("foo"));
	assertEquals("\"123\"", StringUtil.jQuote(Integer.valueOf(123)));
	assertEquals("\"foo's \\\"bar\\\"\"",
	StringUtil.jQuote("foo's \"bar\""));
	assertEquals("\"\\n\\r\\t\\u0001\"",
	StringUtil.jQuote("\n\r\t\u0001"));
	assertEquals("\"<\\nb\\rc\\td\\u0001>\"",
	StringUtil.jQuote("<\nb\rc\td\u0001>"));
	}

	@Test
	public void testJQuoteNoXSS() {
	assertEquals("null", StringUtil.jQuoteNoXSS(null));
	assertEquals("\"foo\"", StringUtil.jQuoteNoXSS("foo"));
	assertEquals("\"123\"", StringUtil.jQuoteNoXSS(Integer.valueOf(123)));
	assertEquals("\"foo's \\\"bar\\\"\"",
	StringUtil.jQuoteNoXSS("foo's \"bar\""));
	assertEquals("\"\\n\\r\\t\\u0001\"",
	StringUtil.jQuoteNoXSS("\n\r\t\u0001"));
	assertEquals("\"\\u003C\\nb\\rc\\td\\u0001>\"",
	StringUtil.jQuoteNoXSS("<\nb\rc\td\u0001>"));
	assertEquals("\"\\u003C\\nb\\rc\\td\\u0001>\"",
	StringUtil.jQuoteNoXSS((Object) "<\nb\rc\td\u0001>"));
	}

	@Test
	public void testFTLStringLiteralEnc() {
	assertEquals("", StringUtil.FTLStringLiteralEnc(""));
	assertEquals("abc", StringUtil.FTLStringLiteralEnc("abc"));
	assertEquals("{", StringUtil.FTLStringLiteralEnc("{"));
	assertEquals("a{b}c", StringUtil.FTLStringLiteralEnc("a{b}c"));
	assertEquals("a#b", StringUtil.FTLStringLiteralEnc("a#b"));
	assertEquals("a$b", StringUtil.FTLStringLiteralEnc("a$b"));
	assertEquals("a#\\{b}c", StringUtil.FTLStringLiteralEnc("a#{b}c"));
	assertEquals("a$\\{b}c", StringUtil.FTLStringLiteralEnc("a${b}c"));
	assertEquals("a'c\\\"d", StringUtil.FTLStringLiteralEnc("a'c\"d", '"'));
	assertEquals("a\\'c\"d", StringUtil.FTLStringLiteralEnc("a'c\"d", '\''));
	assertEquals("a\\'c\"d", StringUtil.FTLStringLiteralEnc("a'c\"d", '\''));
	assertEquals("\\n\\r\\t\\f\\x0002\\\\", StringUtil.FTLStringLiteralEnc("\n\r\t\f\u0002\\"));
	assertEquals("\\l\\g\\a", StringUtil.FTLStringLiteralEnc("<>&"));
	assertEquals("=[\\=]=", StringUtil.FTLStringLiteralEnc("=[=]="));
	assertEquals("[\\=", StringUtil.FTLStringLiteralEnc("[="));
	}

	@Test
	public void testFTLStringLiteralDec() throws ParseException {
	assertEquals("", StringUtil.FTLStringLiteralDec(""));
	assertEquals("x", StringUtil.FTLStringLiteralDec("x"));
	assertEquals("\nq", StringUtil.FTLStringLiteralDec("\\x0Aq"));
	assertEquals("\n\r1", StringUtil.FTLStringLiteralDec("\\x0A\\x000D1"));
	assertEquals("\n\r\t", StringUtil.FTLStringLiteralDec("\\n\\r\\t"));
	assertEquals("${1}#{2}[=3]", StringUtil.FTLStringLiteralDec("$\\{1}#\\{2}[\\=3]"));
	assertEquals("{=", StringUtil.FTLStringLiteralDec("\\{\\="));
	assertEquals("\\=", StringUtil.FTLStringLiteralDec("\\\\="));

	try {
	StringUtil.FTLStringLiteralDec("\\[");
	fail();
	} catch (ParseException e) {
	assertThat(e.getMessage(), containsString("\\["));
	}
	}

	@Test
	public void testGlobToRegularExpression() {
	assertGlobMatches("a/b/c.ftl", "a/b/c.ftl");
	assertGlobDoesNotMatch("/a/b/cxftl", "/a/b/c.ftl", "a/b/C.ftl");

	assertGlobMatches("a/b/*.ftl", "a/b/.ftl", "a/b/x.ftl", "a/b/xx.ftl");
	assertGlobDoesNotMatch("a/b/*.ftl", "a/c/x.ftl", "a/b/c/x.ftl", "/a/b/x.ftl", "a/b/xxftl");

	assertGlobMatches("a/b/?.ftl", "a/b/x.ftl");
	assertGlobDoesNotMatch("a/b/?.ftl", "a/c/x.ftl", "a/b/.ftl", "a/b/xx.ftl", "a/b/xxftl");

	assertGlobMatches("a/**/c.ftl", "a/b/c.ftl", "a/c.ftl", "a/b/b2/b3/c.ftl", "a//c.ftl");
	assertGlobDoesNotMatch("a/**/c.ftl", "x/b/c.ftl", "a/b/x.ftl");

	assertGlobMatches("**/c.ftl", "a/b/c.ftl", "c.ftl", "/c.ftl", "///c.ftl");
	assertGlobDoesNotMatch("**/c.ftl", "a/b/x.ftl");

	assertGlobMatches("a/b/**", "a/b/c.ftl", "a/b/c2/c.ftl", "a/b/", "a/b/c/");
	assertGlobDoesNotMatch("a/b.ftl");

	assertGlobMatches("**", "a/b/c.ftl", "");

	assertGlobMatches("\\[\\{\\\\?\\}\\]\\\\", "[{?}]\\");
	assertGlobDoesNotMatch("\\[\\{\\*\\?\\}\\]\\\\", "[{xx}]\\");

	assertGlobMatches("a/b/\\?.ftl", "a/b/?.ftl");
	assertGlobDoesNotMatch("a/b/\\?.ftl", "a/b/x.ftl");

	assertGlobMatches("\\?\\?.ftl", "??.ftl");
	assertGlobMatches("\\\\\\\\", "\\\\");
	assertGlobMatches("\\\\\\\\?", "\\\\x");
	assertGlobMatches("x\\", "x");

	assertGlobMatches("???*", "123", "1234", "12345");
	assertGlobDoesNotMatch("???*", "12", "1", "");

	assertGlobMatches("*/a??/b.ftl", "a11/b1.ftl", "x/a11/b123.ftl", "x/y/a11/b.ftl");
	assertGlobDoesNotMatch("*/a??/b.ftl", "a1/b1.ftl", "x/a11/c123.ftl");

	assertFalse(StringUtil.globToRegularExpression("ab*").matcher("aBc").matches());
	assertTrue(StringUtil.globToRegularExpression("ab*", true).matcher("aBc").matches());
	assertTrue(StringUtil.globToRegularExpression("ab", true).matcher("aB").matches());
	assertTrue(StringUtil.globToRegularExpression("\u00E1b*", true).matcher("\u00C1bc").matches());

	try {
	StringUtil.globToRegularExpression("x**/y");
	fail();
	} catch (IllegalArgumentException e) {
	assertThat(e.getMessage(), Matchers.containsString("**"));
	}

	try {
	StringUtil.globToRegularExpression("**y");
	fail();
	} catch (IllegalArgumentException e) {
	assertThat(e.getMessage(), Matchers.containsString("**"));
	}

	try {
	StringUtil.globToRegularExpression("[ab]c");
	fail();
	} catch (IllegalArgumentException e) {
	assertThat(e.getMessage(), Matchers.containsString("unsupported"));
	}

	try {
	StringUtil.globToRegularExpression("{aa,bb}c");
	fail();
	} catch (IllegalArgumentException e) {
	assertThat(e.getMessage(), Matchers.containsString("unsupported"));
	}
	}

	private void assertGlobMatches(String glob, String... ss) {
	Pattern pattern = StringUtil.globToRegularExpression(glob);
	for (String s : ss) {
	if (!pattern.matcher(s).matches()) {
	fail("Glob " + glob + " (regexp: " + pattern + ") doesn't match " + s);
	}
	}
	}

	private void assertGlobDoesNotMatch(String glob, String... ss) {
	Pattern pattern = StringUtil.globToRegularExpression(glob);
	for (String s : ss) {
	if (pattern.matcher(s).matches()) {
	fail("Glob " + glob + " (regexp: " + pattern + ") matches " + s);
	}
	}
	}

	@Test
	public void testHTMLEnc() {
	String s = "";
	assertSame(s, StringUtil.HTMLEnc(s));

	s = "asd";
	assertSame(s, StringUtil.HTMLEnc(s));

	assertEquals("a&b<c>d"e'f", StringUtil.HTMLEnc("a&b<c>d\"e'f"));
	assertEquals("<", StringUtil.HTMLEnc("<"));
	assertEquals("<a", StringUtil.HTMLEnc("<a"));
	assertEquals("<a>", StringUtil.HTMLEnc("<a>"));
	assertEquals("a>", StringUtil.HTMLEnc("a>"));
	assertEquals("<>", StringUtil.HTMLEnc("<>"));
	assertEquals("a<>b", StringUtil.HTMLEnc("a<>b"));
	}

	@Test
	public void testXHTMLEnc() throws IOException {
	String s = "";
	assertSame(s, StringUtil.XHTMLEnc(s));

	s = "asd";
	assertSame(s, StringUtil.XHTMLEnc(s));

	testXHTMLEnc("a&b<c>d"e'f", "a&b<c>d\"e'f");
	testXHTMLEnc("<", "<");
	testXHTMLEnc("<a", "<a");
	testXHTMLEnc("<a>", "<a>");
	testXHTMLEnc("a>", "a>");
	testXHTMLEnc("<>", "<>");
	testXHTMLEnc("a<>b", "a<>b");
	}

	private void testXHTMLEnc(String expected, String in) throws IOException {
	assertEquals(expected, StringUtil.XHTMLEnc(in));

	StringWriter sw = new StringWriter();
	StringUtil.XHTMLEnc(in, sw);
	assertEquals(expected, sw.toString());
	}

	@Test
	public void testXMLEnc() throws IOException {
	String s = "";
	assertSame(s, StringUtil.XMLEnc(s));

	s = "asd";
	assertSame(s, StringUtil.XMLEnc(s));

	testXMLEnc("a&b<c>d"e'f", "a&b<c>d\"e'f");
	testXMLEnc("<", "<");
	testXMLEnc("<a", "<a");
	testXMLEnc("<a>", "<a>");
	testXMLEnc("a>", "a>");
	testXMLEnc("<>", "<>");
	testXMLEnc("a<>b", "a<>b");
	}

	private void testXMLEnc(String expected, String in) throws IOException {
	assertEquals(expected, StringUtil.XMLEnc(in));

	StringWriter sw = new StringWriter();
	StringUtil.XMLEnc(in, sw);
	assertEquals(expected, sw.toString());
	}

	@Test
	public void testXMLEncQAttr() throws IOException {
	String s = "";
	assertSame(s, StringUtil.XMLEncQAttr(s));

	s = "asd";
	assertSame(s, StringUtil.XMLEncQAttr(s));

	assertEquals("a&b<c>d"e'f", StringUtil.XMLEncQAttr("a&b<c>d\"e'f"));
	assertEquals("<", StringUtil.XMLEncQAttr("<"));
	assertEquals("<a", StringUtil.XMLEncQAttr("<a"));
	assertEquals("<a>", StringUtil.XMLEncQAttr("<a>"));
	assertEquals("a>", StringUtil.XMLEncQAttr("a>"));
	assertEquals("<>", StringUtil.XMLEncQAttr("<>"));
	assertEquals("a<>b", StringUtil.XMLEncQAttr("a<>b"));
	}

	@Test
	public void testXMLEncNQG() throws IOException {
	String s = "";
	assertSame(s, StringUtil.XMLEncNQG(s));

	s = "asd";
	assertSame(s, StringUtil.XMLEncNQG(s));

	assertEquals("a&b<c>d\"e'f", StringUtil.XMLEncNQG("a&b<c>d\"e'f"));
	assertEquals("<", StringUtil.XMLEncNQG("<"));
	assertEquals("<a", StringUtil.XMLEncNQG("<a"));
	assertEquals("<a>", StringUtil.XMLEncNQG("<a>"));
	assertEquals("a>", StringUtil.XMLEncNQG("a>"));
	assertEquals("<>", StringUtil.XMLEncNQG("<>"));
	assertEquals("a<>b", StringUtil.XMLEncNQG("a<>b"));

	assertEquals(">", StringUtil.XMLEncNQG(">"));
	assertEquals("]>", StringUtil.XMLEncNQG("]>"));
	assertEquals("]]>", StringUtil.XMLEncNQG("]]>"));
	assertEquals("x]]>", StringUtil.XMLEncNQG("x]]>"));
	assertEquals("x]>", StringUtil.XMLEncNQG("x]>"));
	assertEquals("]x>", StringUtil.XMLEncNQG("]x>"));
	}

	@Test
	public void testRTFEnc() throws IOException {
	String s = "";
	assertSame(s, StringUtil.RTFEnc(s));

	s = "asd";
	assertSame(s, StringUtil.RTFEnc(s));

	testRTFEnc("a\\{b\\}c\\\\d", "a{b}c\\d");
	testRTFEnc("\\{", "{");
	testRTFEnc("\\{a", "{a");
	testRTFEnc("\\{a\\}", "{a}");
	testRTFEnc("a\\}", "a}");
	testRTFEnc("\\{\\}", "{}");
	testRTFEnc("a\\{\\}b", "a{}b");
	}

	private void testRTFEnc(String expected, String in) throws IOException {
	assertEquals(expected, StringUtil.RTFEnc(in));

	StringWriter sw = new StringWriter();
	StringUtil.RTFEnc(in, sw);
	assertEquals(expected, sw.toString());
	}

	@Test
	public void jsStringEncQuotationTests() {
	for (JsStringEncCompatibility anyCompatibility : JsStringEncCompatibility.values()) {
	JsStringEncCompatibility anyJsonCompatible = anyCompatibility.isJSONCompatible() ? anyCompatibility : JSON;

	assertEquals("", StringUtil.jsStringEnc("", anyCompatibility, null));
	assertEquals("''", StringUtil.jsStringEnc("", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"\"", StringUtil.jsStringEnc("", anyCompatibility, QUOTATION_MARK));

	assertEquals("a", StringUtil.jsStringEnc("a", anyCompatibility, null));
	assertEquals("a", StringUtil.jsStringEnc("a", anyCompatibility, null));
	assertEquals("'a'", StringUtil.jsStringEnc("a", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"a\"", StringUtil.jsStringEnc("a", anyCompatibility, QUOTATION_MARK));

	try {
	StringUtil.jsStringEnc("", anyJsonCompatible, APOSTROPHE);
	fail();
	} catch (IllegalArgumentException e) {
	// expected
	}

	assertEquals("a\\'b", StringUtil.jsStringEnc("a'b", JAVA_SCRIPT, null));
	assertEquals("a'b", StringUtil.jsStringEnc("a'b", JSON, null));
	assertEquals("a\\u0027b", StringUtil.jsStringEnc("a'b", JAVA_SCRIPT_OR_JSON, null));
	assertEquals("'a\\'b'", StringUtil.jsStringEnc("a'b", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"a'b\"", StringUtil.jsStringEnc("a'b", anyCompatibility, QUOTATION_MARK));

	assertEquals("<\\/e>", StringUtil.jsStringEnc("</e>", anyCompatibility, null));
	assertEquals("'<\\/e>'", StringUtil.jsStringEnc("</e>", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"<\\/e>\"", StringUtil.jsStringEnc("</e>", anyCompatibility, QUOTATION_MARK));

	assertEquals("\\/e>", StringUtil.jsStringEnc("/e>", anyCompatibility, null));
	assertEquals("'/e>'", StringUtil.jsStringEnc("/e>", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"/e>\"", StringUtil.jsStringEnc("/e>", anyCompatibility, QUOTATION_MARK));

	assertEquals("\\>", StringUtil.jsStringEnc(">", JAVA_SCRIPT, null));
	assertEquals("\\u003E", StringUtil.jsStringEnc(">", JSON, null));
	assertEquals("'>'", StringUtil.jsStringEnc(">", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\">\"", StringUtil.jsStringEnc(">", anyCompatibility, QUOTATION_MARK));

	assertEquals("-\\>", StringUtil.jsStringEnc("->", JAVA_SCRIPT, null));
	assertEquals("-\\u003E", StringUtil.jsStringEnc("->", JSON, null));
	assertEquals("'->'", StringUtil.jsStringEnc("->", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"->\"", StringUtil.jsStringEnc("->", JAVA_SCRIPT, QUOTATION_MARK));

	assertEquals("--\\>", StringUtil.jsStringEnc("-->", JAVA_SCRIPT, null));
	assertEquals("--\\u003E", StringUtil.jsStringEnc("-->", anyJsonCompatible, null));
	assertEquals("'--\\>'", StringUtil.jsStringEnc("-->", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"--\\>\"", StringUtil.jsStringEnc("-->", JAVA_SCRIPT, QUOTATION_MARK));
	assertEquals("\"--\\u003E\"", StringUtil.jsStringEnc("-->", anyJsonCompatible, QUOTATION_MARK));

	assertEquals("x->", StringUtil.jsStringEnc("x->", anyCompatibility, null));
	assertEquals("'x->'", StringUtil.jsStringEnc("x->", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"x->\"", StringUtil.jsStringEnc("x->", anyCompatibility, QUOTATION_MARK));

	assertEquals("\\x3C", StringUtil.jsStringEnc("<", JAVA_SCRIPT, null));
	assertEquals("\\u003C", StringUtil.jsStringEnc("<", JSON, null));
	assertEquals("'<'", StringUtil.jsStringEnc("<", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"<\"", StringUtil.jsStringEnc("<", anyCompatibility, QUOTATION_MARK));

	assertEquals("\\x3C!", StringUtil.jsStringEnc("<!", JAVA_SCRIPT, null));
	assertEquals("\\u003C!", StringUtil.jsStringEnc("<!", JSON, null));
	assertEquals("'\\x3C!'", StringUtil.jsStringEnc("<!", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"\\x3C!\"", StringUtil.jsStringEnc("<!", JAVA_SCRIPT, QUOTATION_MARK));
	assertEquals("\"\\u003C!\"", StringUtil.jsStringEnc("<!", anyJsonCompatible, QUOTATION_MARK));

	assertEquals("<x", StringUtil.jsStringEnc("<x", anyCompatibility, null));
	assertEquals("'<x'", StringUtil.jsStringEnc("<x", JAVA_SCRIPT, APOSTROPHE));
	assertEquals("\"<x\"", StringUtil.jsStringEnc("<x", anyCompatibility, QUOTATION_MARK));
	}
	}

	}