public async Task AddSamplePlaylistAsync_ShouldReturnNewSamplePlaylist()
        {
            //arrange
            SamplePlaylist samplePlaylist = new SamplePlaylist
            {
                Id          = 89,
                SampleId    = 1,
                SampleSetId = 1
            };
            ProjectDBContext context       = new ProjectDBContext(options);
            ProjectRepoDB    projectRepoDB = new ProjectRepoDB(context);

            //act
            var result = await projectRepoDB.AddSamplePlaylistAsync(samplePlaylist);

            //assert
            Assert.Equal(samplePlaylist.SampleSetId, result.SampleSetId);
        }