public async Task GetsTeamsSize() { using (var context = new ApplicationDbContext(_options)) { context.Teams.AddRange( new Team { Id = 1 }, new Team { Id = 2 }, new Team { Id = 3 }); context.SaveChanges(); } using (var context = new ApplicationDbContext(_options)) { var teamsRepository = new TeamsRepository(context); var teamsSize = await teamsRepository.GetSize(null); Assert.Equal(3, teamsSize); } }