( function ( mw ) {
	var HelpDialog = mw.libs.revisionSlider.HelpDialog;

	QUnit.module( 'ext.RevisionSlider.HelpDialog' );

	QUnit.test( 'Initialize HelpDialog', function ( assert ) {
		var helpDialog = new HelpDialog(),
		    windowManager = new OO.ui.WindowManager(),
			dialogue = new HelpDialog();

		$( 'body' ).append( windowManager.$element );
		windowManager.addWindows( [ helpDialog ] );

		assert.equal( helpDialog.slides.length, 4 );
		assert.equal( helpDialog.slidePointer, 0 );
		assert.equal( getSlideTextHtml( helpDialog.slides[0] ), mw.message( 'revisionslider-help-dialog-slide1' ).parse() );
		assert.equal( getSlideTextHtml( helpDialog.slides[1] ), mw.message( 'revisionslider-help-dialog-slide2' ).parse() );
		assert.equal( getSlideTextHtml( helpDialog.slides[2] ), mw.message( 'revisionslider-help-dialog-slide3' ).parse() );
		assert.equal( getSlideTextHtml( helpDialog.slides[3] ), mw.message( 'revisionslider-help-dialog-slide4' ).parse() );
	} );

	function getSlideTextHtml( slide ) {
		return slide.$element.find( '.mw-help-dialog-text' ).html();
	}

} )( mediaWiki );