add test

@@ -10,6 +10,8 @@
         <a id="test3" href="page1.html" onclick="results.test3 = true; return false">test3</a>
         <a id="test4" href="http://www.google.com/">test4</a>
         <a id="test5" href="#">test5</a>
+        <a id="test6" href="#">Label with double "quotes"</a>
+        <a id="test7" href="#">Label with single 'quotes'</a>
         <script>
             (function(window) {
                 window.results = {
@@ -18,6 +20,8 @@
                     test3: false,
                     test4: false,
                     test5: [],
+	                test6: false,
+	                test7: false,
                     testdown:        [],
                     testup:          [],
                     testmove:        [],
@@ -47,6 +51,14 @@
                 test5elem.addEventListener('mouseup', function(event) {
                     results.test5.push('mouseup');
                 });
+	            document.querySelector('#test6').onclick = function(event) {
+		            results.test6 = true;
+		            event.preventDefault();
+	            };
+	            document.querySelector('#test7').onclick = function(event) {
+		            results.test7 = true;
+		            event.preventDefault();
+	            };
             })(window);
         </script>
     </body>

@@ -40,6 +40,10 @@ casper.test.begin('clickLabel tests tests', 8, function(test) {
             'Casper.clickLabel() can click an `onclick=".*; return false"` link');
         test.assert(this.clickLabel('test4'),
             'Casper.clickLabel() can click an unobstrusive js handled link');
+        test.assert(this.clickLabel('Label with double "quotes"'),
+            'Casper.clickLabel() can click the link with double quotes in the label');
+        test.assert(this.clickLabel("Label with single 'quotes'"),
+            'Casper.clickLabel() can click the link with the single quotes in the label');
         var results = this.getGlobal('results');
         test.assert(results.test1,
             'Casper.clickLabel() has clicked an `href="javascript:` link');
@@ -49,6 +53,10 @@ casper.test.begin('clickLabel tests tests', 8, function(test) {
             'Casper.clickLabel() has clicked an `onclick=".*; return false"` link');
         test.assert(results.test4,
             'Casper.clickLabel() has clicked an unobstrusive js handled link');
+        test.assert(results.test6,
+            'Casper.clickLabel() has clicked the link with double quotes in the label');
+        test.assert(results.test7,
+            'Casper.clickLabel() has clicked the link with single quotes in the label');
     }).run(function() {
         test.done();
     });

@@ -339,6 +339,19 @@ casper.test.begin('objectValues() tests', 2, function(test) {
     test.done();
 });
 
+casper.test.begin('quoteXPathAttributeString() tests', 2, function(test) {
+    casper.start('tests/site/click.html', function() {
+        var selector = utils.format('//a[text()=%s]',
+            utils.quoteXPathAttributeString('Label with double "quotes"'));
+        test.assertExists(x(selector), utils.format('Xpath selector "%s" is found on "tests/site/click.html" page', selector));
+        selector = utils.format('//a[text()=%s]',
+            utils.quoteXPathAttributeString("Label with single 'quotes'"));
+        test.assertExists(x(selector), utils.format('Xpath selector "%s" is found on "tests/site/click.html" page', selector));
+    }).run(function() {
+        test.done();
+    });
+});
+
 casper.test.begin('unique() tests', 4, function(test) {
     var testCases = [
         {