public void CheckIfMethodGivingPoperHomeworkDto_()
        {
            //Arrange
            var homework          = new Homework();
            var homeworkDto       = new HomeworkDto();
            var homeworkRepoMock  = new Mock <IHomeworkRepo>();
            var entityToDtoMapper = new Mock <IEntityToDtoMapper>();

            homeworkRepoMock.Setup(x => x.GetHomeworkByIds(It.IsAny <int>(), It.IsAny <int>())).Returns(homework); //Dla jakiegokolwiek id kursi i studenta zwroc mi homework
            entityToDtoMapper.Setup(x => x.HomeworkModelToDto(homework)).Returns(homeworkDto);                     //jezeli dostaniesz homework, zwroc mi homeworkDto

            var homeworkService = new HomeworkService(homeworkRepoMock.Object, entityToDtoMapper.Object);          //tworze obiekt homeworkService, który bede zaraz testował

            //Act
            var result = homeworkService.GetHomeworkByIds(1, 1); //dla obojetnie jakich id

            //Assert

            Assert.AreSame(result, homeworkDto); //Sprawdz, czy zwrocil mi HomeworkDTO
        }