public void AddGuide()
        {
            var excursion =
                DefaultCreator.createExursion(DefaultCreator.createDateTime());

            var guide = DefaultCreator.createGuide();

            excursion.addGuide(guide);

            Assert.IsNotEmpty(excursion.getAvailableGuides());
            Assert.AreEqual(guide, excursion.getAvailableGuides()[0]);
        }
        public void CheckGetAvailableLanguages()
        {
            var excursion =
                DefaultCreator.createExursion(DefaultCreator.createDateTime());

            var language = @"Ukranian";

            var guide = DefaultCreator.createGuide(language);

            excursion.addGuide(guide);

            Assert.IsTrue(excursion.getAvailableLanguages().Contains(language));
        }
        public void TwiceAddOneGuide()
        {
            var excursion =
                DefaultCreator.createExursion(DefaultCreator.createDateTime());

            var guide = DefaultCreator.createGuide();

            excursion.addGuide(guide);

            Assert.IsNotEmpty(excursion.getAvailableGuides());
            Assert.Throws <Exception>(
                () => excursion.addGuide(guide)
                );
        }