public async void UpdateOptionAsync_ShouldUpdateOption() { // Arrange //create in memory options var options = new DbContextOptionsBuilder <DataBaseContext>() .UseInMemoryDatabase(databaseName: "UpdateOptionAsync_ShouldUpdateOption") .Options; using (var context = new DataBaseContext(options)) { await context.AddRangeAsync(optionsList); await context.SaveChangesAsync(); Assert.Equal(2, await context.ProductOption.CountAsync()); } firstOption.Name = "updated name"; firstOption.Description = "updated des"; // Act using (var context = new DataBaseContext(options)) { var repo = new OptionRepository(context); var result = await repo.UpdateOptionAsync(firstOption); Assert.Equal(firstOption.Id, result.Id); } using (var context = new DataBaseContext(options)) { var updatedoption = await context.ProductOption.FirstAsync(o => o.Id == firstOption.Id); Assert.Equal(firstOption.Name, updatedoption.Name); Assert.Equal(firstOption.Description, updatedoption.Description); } }