			QUnit.test( 'Using data-preload', function( assert ) {

					Reveal.slide(1);
					assert.strictEqual( getIframe(2).hasAttribute( 'src' ), true, 'preloaded within viewDistance' );
					assert.strictEqual( getIframe(1).hasAttribute( 'src' ), true, 'loaded when slide becomes visible' );

					Reveal.slide(0);
					assert.strictEqual( getIframe(3).hasAttribute( 'src' ), false, 'unloads outside of viewDistance' );

				});

				QUnit.test( 'Using preloadIframes: true', function( assert ) {

					Reveal.confi