public void PersonService_GetWoDBUserAsync_ReturnsPersonsWoUser() { //Arrange var mockDbContextScopeFac = new Mock<IDbContextScopeFactory>(); var mockDbContextScope = new Mock<IDbContextReadOnlyScope>(); var mockEfDbContext = new Mock<EFDbContext>(); mockDbContextScopeFac.Setup(x => x.CreateReadOnly(DbContextScopeOption.JoinExisting)).Returns(mockDbContextScope.Object); mockDbContextScope.Setup(x => x.DbContexts.Get<EFDbContext>()).Returns(mockEfDbContext.Object); var mockAppUserManager = new Mock<IAppUserManager>(); var mockDbUserService = new Mock<DBUserService>(new object[] {mockDbContextScopeFac.Object, mockAppUserManager.Object, true }); var dbEntry1 = new Person { Id = "dummyEntryId1", FirstName = "First1", LastName = "Last1", IsActive_bl = false, Initials = "FLA1" }; var dbEntry2 = new Person { Id = "dummyEntryId2", FirstName = "First2", LastName = "Last2", IsActive_bl = true, Initials = "FLA2" }; var dbEntry3 = new Person { Id = "dummyEntryId3", FirstName = "First3", LastName = "Last3", IsActive_bl = true, Initials = "FLA3", DBUser = new DBUser() }; var dbEntries = (new List<Person> { dbEntry1, dbEntry2, dbEntry3 }).AsQueryable(); var mockDbSet = new Mock<DbSet<Person>>(); mockDbSet.As<IDbAsyncEnumerable<Person>>().Setup(m => m.GetAsyncEnumerator()).Returns(new MockDbAsyncEnumerator<Person>(dbEntries.GetEnumerator())); mockDbSet.As<IQueryable<Person>>().Setup(m => m.Provider).Returns(new MockDbAsyncQueryProvider<Person>(dbEntries.Provider)); mockDbSet.As<IQueryable<Person>>().Setup(m => m.Expression).Returns(dbEntries.Expression); mockDbSet.As<IQueryable<Person>>().Setup(m => m.ElementType).Returns(dbEntries.ElementType); mockDbSet.As<IQueryable<Person>>().Setup(m => m.GetEnumerator()).Returns(dbEntries.GetEnumerator()); mockEfDbContext.Setup(x => x.Persons).Returns(mockDbSet.Object); var personService = new PersonService(mockDbContextScopeFac.Object, "DummyUserId"); //Act var serviceResult = personService.GetWoDBUserAsync().Result; //Assert Assert.IsTrue(serviceResult.Count == 1); Assert.IsTrue(serviceResult[0].LastName.Contains("Last2")); }