public void TeacherTest()
        {
            var teacherName = "Макаренко";
            var result      = _controller.Teacher(teacherName) as ViewResult;

            _teachersMock.Verify(item => item.GetByName(teacherName), Times.Once());
            Assert.IsTrue(result.Model is TeachersSubjectsViewModel);
            var model = (TeachersSubjectsViewModel)result.Model;

            Assert.AreEqual(1, model.Subjects.Count);
            Assert.AreEqual("Алгебра", model.Subjects[0].Title);
            Assert.AreEqual(teacherName, model.Teacher.Name);
        }