( function ( mw ) {
	// mw.Title relies on these three config vars
	// Restore them after each test run
	var config = {
		wgFormattedNamespaces: {
			'-2': 'Media',
			'-1': 'Special',
			0: '',
			1: 'Talk',
			2: 'User',
			3: 'User talk',
			4: 'Wikipedia',
			5: 'Wikipedia talk',
			6: 'File',
			7: 'File talk',
			8: 'MediaWiki',
			9: 'MediaWiki talk',
			10: 'Template',
			11: 'Template talk',
			12: 'Help',
			13: 'Help talk',
			14: 'Category',
			15: 'Category talk',
			// testing custom / localized namespace
			100: 'Penguins'
		},
		wgNamespaceIds: {
			/*jshint camelcase: false */
			media: -2,
			special: -1,
			'': 0,
			talk: 1,
			user: 2,
			user_talk: 3,
			wikipedia: 4,
			wikipedia_talk: 5,
			file: 6,
			file_talk: 7,
			mediawiki: 8,
			mediawiki_talk: 9,
			template: 10,
			template_talk: 11,
			help: 12,
			help_talk: 13,
			category: 14,
			category_talk: 15,
			image: 6,
			image_talk: 7,
			project: 4,
			project_talk: 5,
			/* testing custom / alias */
			penguins: 100,
			antarctic_waterfowl: 100
		},
		wgCaseSensitiveNamespaces: []
	};

	QUnit.module( 'mediawiki.Title', QUnit.newMwEnvironment( { config: config } ) );

	QUnit.test( 'Transformation', 8, function ( assert ) {
		var title;

		title = new mw.Title( 'File:quux pif.jpg' );
		assert.equal( title.getName(), 'Quux_pif' );

		title = new mw.Title( 'File:Glarg_foo_glang.jpg' );
		assert.equal( title.getNameText(), 'Glarg foo glang' );

		title = new mw.Title( 'User:ABC.DEF' );
		assert.equal( title.toText(), 'User:ABC.DEF' );
		assert.equal( title.getNamespaceId(), 2 );
		assert.equal( title.getNamespacePrefix(), 'User:' );

		title = new mw.Title( 'uSEr:hAshAr' );
		assert.equal( title.toText(), 'User:HAshAr' );
		assert.equal( title.getNamespaceId(), 2 );

		title = new mw.Title( '   MediaWiki:  Foo   bar   .js   ' );
		// Don't ask why, it's the way the backend works. One space is kept of each set
		assert.equal( title.getName(), 'Foo_bar_.js', 'Merge multiple spaces to a single space.' );
	} );

	QUnit.test( 'Main text for filename', 8, function ( assert ) {
		var title = new mw.Title( 'File:foo_bar.JPG' );

		assert.equal( title.getNamespaceId(), 6 );
		assert.equal( title.getNamespacePrefix(), 'File:' );
		assert.equal( title.getName(), 'Foo_bar' );
		assert.equal( title.getNameText(), 'Foo bar' );
		assert.equal( title.getMain(), 'Foo_bar.JPG' );
		assert.equal( title.getMainText(), 'Foo bar.JPG' );
		assert.equal( title.getExtension(), 'JPG' );
		assert.equal( title.getDotExtension(), '.JPG' );
	} );

	QUnit.test( 'Namespace detection and conversion', 6, function ( assert ) {
		var title;

		title = new mw.Title( 'something.PDF', 6 );
		assert.equal( title.toString(), 'File:Something.PDF' );

		title = new mw.Title( 'NeilK', 3 );
		assert.equal( title.toString(), 'User_talk:NeilK' );
		assert.equal( title.toText(), 'User talk:NeilK' );

		title = new mw.Title( 'Frobisher', 100 );
		assert.equal( title.toString(), 'Penguins:Frobisher' );

		title = new mw.Title( 'antarctic_waterfowl:flightless_yet_cute.jpg' );
		assert.equal( title.toString(), 'Penguins:Flightless_yet_cute.jpg' );

		title = new mw.Title( 'Penguins:flightless_yet_cute.jpg' );
		assert.equal( title.toString(), 'Penguins:Flightless_yet_cute.jpg' );
	} );

	QUnit.test( 'Throw error on invalid title', 1, function ( assert ) {
		assert.throws( function () {
			return new mw.Title( '' );
		}, 'Throw error on empty string' );
	} );

	QUnit.test( 'Case-sensivity', 3, function ( assert ) {
		var title;

		// Default config
		mw.config.set( 'wgCaseSensitiveNamespaces', [] );

		title = new mw.Title( 'article' );
		assert.equal( title.toString(), 'Article', 'Default config: No sensitive namespaces by default. First-letter becomes uppercase' );

		// $wgCapitalLinks = false;
		mw.config.set( 'wgCaseSensitiveNamespaces', [0, -2, 1, 4, 5, 6, 7, 10, 11, 12, 13, 14, 15] );

		title = new mw.Title( 'article' );
		assert.equal( title.toString(), 'article', '$wgCapitalLinks=false: Article namespace is sensitive, first-letter case stays lowercase' );

		title = new mw.Title( 'john', 2 );
		assert.equal( title.toString(), 'User:John', '$wgCapitalLinks=false: User namespace is insensitive, first-letter becomes uppercase' );
	} );

	QUnit.test( 'toString / toText', 2, function ( assert ) {
		var title = new mw.Title( 'Some random page' );

		assert.equal( title.toString(), title.getPrefixedDb() );
		assert.equal( title.toText(), title.getPrefixedText() );
	} );

	QUnit.test( 'getExtension', 7, function ( assert ) {
		function extTest( pagename, ext, description ) {
			var title = new mw.Title( pagename );
			assert.equal( title.getExtension(), ext, description || pagename );
		}

		extTest( 'MediaWiki:Vector.js', 'js' );
		extTest( 'User:Example/common.css', 'css' );
		extTest( 'File:Example.longextension', 'longextension', 'Extension parsing not limited (bug 36151)' );
		extTest( 'Example/information.json', 'json', 'Extension parsing not restricted from any namespace' );
		extTest( 'Foo.', null, 'Trailing dot is not an extension' );
		extTest( 'Foo..', null, 'Trailing dots are not an extension' );
		extTest( 'Foo.a.', null, 'Page name with dots and ending in a dot does not have an extension' );

		// @broken: Throws an exception
		// extTest( '.NET', null, 'Leading dot is (or is not?) an extension' );
	} );

	QUnit.test( 'exists', 3, function ( assert ) {
		var title;

		// Empty registry, checks default to null

		title = new mw.Title( 'Some random page', 4 );
		assert.strictEqual( title.exists(), null, 'Return null with empty existance registry' );

		// Basic registry, checks default to boolean
		mw.Title.exist.set( ['Does_exist', 'User_talk:NeilK', 'Wikipedia:Sandbox_rules'], true );
		mw.Title.exist.set( ['Does_not_exist', 'User:John', 'Foobar'], false );

		title = new mw.Title( 'Project:Sandbox rules' );
		assert.assertTrue( title.exists(), 'Return true for page titles marked as existing' );
		title = new mw.Title( 'Foobar' );
		assert.assertFalse( title.exists(), 'Return false for page titles marked as nonexistent' );

	} );

	QUnit.test( 'getUrl', 2, function ( assert ) {
		var title;

		// Config
		mw.config.set( 'wgArticlePath', '/wiki/$1' );

		title = new mw.Title( 'Foobar' );
		assert.equal( title.getUrl(), '/wiki/Foobar', 'Basic functionally, toString passing to wikiGetlink' );

		title = new mw.Title( 'John Doe', 3 );
		assert.equal( title.getUrl(), '/wiki/User_talk:John_Doe', 'Escaping in title and namespace for urls' );
	} );

}( mediaWiki ) );