        let text = yield page.headerText();
        assert.equal(text, 'Title 2', 'header text is now "Title 2" ');
        let queueSize = yield page.queueSize();
        assert.equal(queueSize, 0);
    });

    test.it('should support adding items to a collection', function *() {

    });

    test.after(function*() {
        yield driver.quit();
    });
