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diff --git a/tests/qunit/suites/resources/jquery/jquery.textSelection.test.js b/tests/qunit/suites/resources/jquery/jquery.textSelection.test.js
new file mode 100644
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+++ b/tests/qunit/suites/resources/jquery/jquery.textSelection.test.js
@@ -0,0 +1,279 @@
+module( 'jquery.textSelection', QUnit.newMwEnvironment() );
+
+test( '-- Initial check', function() {
+	expect(1);
+	ok( $.fn.textSelection, 'jQuery.fn.textSelection defined' );
+} );
+
+/**
+ * Test factory for $.fn.textSelection( 'encapsulateText' )
+ *
+ * @param options {object} associative array containing:
+ *   description {string}
+ *   input {string}
+ *   output {string}
+ *   start {int} starting char for selection
+ *   end {int} ending char for selection
+ *   params {object} add'l parameters for $().textSelection( 'encapsulateText' )
+ */
+var encapsulateTest = function( options ) {
+	var opt = $.extend({
+		description: '',
+		before: {},
+		after: {},
+		replace: {}
+	}, options);
+
+	opt.before = $.extend({
+		text: '',
+		start: 0,
+		end: 0
+	}, opt.before);
+	opt.after = $.extend({
+		text: '',
+		selected: null
+	}, opt.after);
+
+	test( opt.description, function() {
+		var tests = 1;
+		if ( opt.after.selected !== null ) {
+			tests++;
+		}
+		expect( tests );
+
+		var $textarea = $( '<textarea>' );
+
+		$( '#qunit-fixture' ).append( $textarea );
+
+		//$textarea.textSelection( 'setContents', opt.before.text); // this method is actually missing atm...
+		$textarea.val( opt.before.text ); // won't work with the WikiEditor iframe?
+
+		var	start = opt.before.start,
+			end = opt.before.end;
+		if ( window.opera ) {
+			// Compensate for Opera's craziness converting "\n" to "\r\n" and counting that as two chars
+			var	newLinesBefore = opt.before.text.substring( 0, start ).split( "\n" ).length - 1,
+				newLinesInside = opt.before.text.substring( start, end ).split( "\n" ).length - 1;
+			start += newLinesBefore;
+			end += newLinesBefore + newLinesInside;
+		}
+
+		var options = $.extend( {}, opt.replace ); // Clone opt.replace
+		options.selectionStart = start;
+		options.selectionEnd = end;
+		$textarea.textSelection( 'encapsulateSelection', options );
+
+		var text = $textarea.textSelection( 'getContents' ).replace( /\r\n/g, "\n" );
+
+		equal( text, opt.after.text, 'Checking full text after encapsulation' );
+
+		if (opt.after.selected !== null) {
+			var selected = $textarea.textSelection( 'getSelection' );
+			equal( selected, opt.after.selected, 'Checking selected text after encapsulation.' );
+		}
+
+	} );
+};
+
+var sig = {
+	'pre': "--~~~~"
+}, bold = {
+	pre: "'''",
+	peri: 'Bold text',
+	post: "'''"
+}, h2 = {
+	'pre': '== ',
+	'peri': 'Heading 2',
+	'post': ' ==',
+	'regex': /^(\s*)(={1,6})(.*?)\2(\s*)$/,
+	'regexReplace': "\$1==\$3==\$4",
+	'ownline': true
+}, ulist = {
+	'pre': "* ",
+	'peri': 'Bulleted list item',
+	'post': "",
+	'ownline': true,
+	'splitlines': true
+};
+
+encapsulateTest({
+	description: "Adding sig to end of text",
+	before: {
+		text: "Wikilove dude! ",
+		start: 15,
+		end: 15
+	},
+	after: {
+		text: "Wikilove dude! --~~~~",
+		selected: ""
+	},
+	replace: sig
+});
+
+encapsulateTest({
+	description: "Adding bold to empty",
+	before: {
+		text: "",
+		start: 0,
+		end: 0
+	},
+	after: {
+		text: "'''Bold text'''",
+		selected: "Bold text" // selected because it's the default
+	},
+	replace: bold
+});
+
+encapsulateTest({
+	description: "Adding bold to existing text",
+	before: {
+		text: "Now is the time for all good men to come to the aid of their country",
+		start: 20,
+		end: 32
+	},
+	after: {
+		text: "Now is the time for '''all good men''' to come to the aid of their country",
+		selected: "" // empty because it's not the default'
+	},
+	replace: bold
+});
+
+encapsulateTest({
+	description: "ownline option: adding new h2",
+	before: {
+		text:"Before\nAfter",
+		start: 7,
+		end: 7
+	},
+	after: {
+		text: "Before\n== Heading 2 ==\nAfter",
+		selected: "Heading 2"
+	},
+	replace: h2
+});
+
+encapsulateTest({
+	description: "ownline option: turn a whole line into new h2",
+	before: {
+		text:"Before\nMy heading\nAfter",
+		start: 7,
+		end: 17
+	},
+	after: {
+		text: "Before\n== My heading ==\nAfter",
+		selected: ""
+	},
+	replace: h2
+});
+
+
+encapsulateTest({
+	description: "ownline option: turn a partial line into new h2",
+	before: {
+		text:"BeforeMy headingAfter",
+		start: 6,
+		end: 16
+	},
+	after: {
+		text: "Before\n== My heading ==\nAfter",
+		selected: ""
+	},
+	replace: h2
+});
+
+
+encapsulateTest({
+	description: "splitlines option: no selection, insert new list item",
+	before: {
+		text: "Before\nAfter",
+		start: 7,
+		end: 7
+	},
+	after: {
+		text: "Before\n* Bulleted list item\nAfter"
+	},
+	replace: ulist
+});
+
+encapsulateTest({
+	description: "splitlines option: single partial line selection, insert new list item",
+	before: {
+		text: "BeforeMy List ItemAfter",
+		start: 6,
+		end: 18
+	},
+	after: {
+		text: "Before\n* My List Item\nAfter"
+	},
+	replace: ulist
+});
+
+encapsulateTest({
+	description: "splitlines option: multiple lines",
+	before: {
+		text: "Before\nFirst\nSecond\nThird\nAfter",
+		start: 7,
+		end: 25
+	},
+	after: {
+		text: "Before\n* First\n* Second\n* Third\nAfter"
+	},
+	replace: ulist
+});
+
+
+var caretTest = function(options) {
+	test(options.description, function() {
+		expect(2);
+
+		var $textarea = $( '<textarea>' ).text(options.text);
+
+		$( '#qunit-fixture' ).append( $textarea );
+
+		if (options.mode == 'set') {
+			$textarea.textSelection('setSelection', {
+				start: options.start,
+				end: options.end
+			});
+		}
+
+		var among = function(actual, expected, message) {
+			if ($.isArray(expected)) {
+				ok($.inArray(actual, expected) !== -1 , message + ' (got ' + actual + '; expected one of ' + expected.join(', ') + ')');
+			} else {
+				equal(actual, expected, message);
+			}
+		};
+
+		var pos = $textarea.textSelection('getCaretPosition', {startAndEnd: true});
+		among(pos[0], options.start, 'Caret start should be where we set it.');
+		among(pos[1], options.end, 'Caret end should be where we set it.');
+	});
+}
+
+var caretSample = "Some big text that we like to work with. Nothing fancy... you know what I mean?";
+
+caretTest({
+	description: 'getCaretPosition with original/empty selection - bug 31847 with IE 6/7/8',
+	text: caretSample,
+	start: [0, caretSample.length], // Opera and Firefox (prior to FF 6.0) default caret to the end of the box (caretSample.length)
+	end: [0, caretSample.length], // Other browsers default it to the beginning (0), so check both.
+	mode: 'get'
+});
+
+caretTest({
+	description: 'set/getCaretPosition with forced empty selection',
+	text: caretSample,
+	start: 7,
+	end: 7,
+	mode: 'set'
+});
+
+caretTest({
+	description: 'set/getCaretPosition with small selection',
+	text: caretSample,
+	start: 6,
+	end: 11,
+	mode: 'set'
+});
+