public void EsperantoLanguageTest()
        {
            LanguageSchoolDirector school = new LanguageSchoolDirector(new EsperantoCourseBuilder());

            school.BeginCourse();
            Assert.AreEqual("Esperanto", school.GetCourse().Language);
            Assert.AreEqual(1, school.GetCourse().CourseBooks.Count);
            Assert.AreEqual(900, school.GetCourse().Price);
        }
        public void EnglishLanguageTest()
        {
            LanguageSchoolDirector school = new LanguageSchoolDirector(new EnglishCourseBuilder());

            school.BeginCourse();
            Assert.AreEqual("English", school.GetCourse().Language);
            Assert.AreEqual(2, school.GetCourse().CourseBooks.Count);
            Assert.AreEqual(1200, school.GetCourse().Price);
        }