public void ShouldReturnListOfUsersWhoseLastActivityDateWas15MinutesAgo() { var testData = UserTestData.Setup(false); testData.Repository.Setup(i => i.GetUserCount(It.IsAny<DateTime?>())).Returns(10); var provider = new SrirachaMembershipProvider(testData.Repository.Object); int userCount = provider.GetNumberOfUsersOnline(); Assert.AreEqual(10, userCount); }