public async Task UpdateSampleAsync_ShouldReturnOldSample() { //arrange Sample sample = new Sample { Id = 1, SampleName = "new sample name" }; ProjectDBContext projectDBContext = new ProjectDBContext(options); ProjectRepoDB projectRepoDB = new ProjectRepoDB(projectDBContext); //act var result = await projectRepoDB.UpdateSampleAsync(sample); //assert Assert.Equal(sample.SampleName, result.SampleName); }