public async Task GetAllAsync_Uses_Map_From_IMapper()
        {
            // Arrange
            var sut = new GroupQueries(_groupRepository.Object, _mapper.Object);
            // Act
            await sut.GetAllAsync();

            // Assert
            _mapper.Verify(m => m.Map <IEnumerable <GroupDto> >(It.IsAny <IEnumerable <Group> >()), Times.Once);
        }
        public async Task GetAllAsync_Uses_GetAllAsync_From_IGroupRepository()
        {
            // Arrange
            var sut = new GroupQueries(_groupRepository.Object, _mapper.Object);
            // Act
            await sut.GetAllAsync();

            // Assert
            _groupRepository.Verify(r => r.GetAllAsync(), Times.Once);
        }