BrightstarDB.Tests.EntityFramework.LinqTests.TestLinqSingleOrDefault C# (CSharp) Метод

        public void TestLinqSingleOrDefault()
        {
            var connectionString = GetConnectionString("TestLinqSingleOrDefault");
            var context = new MyEntityContext(connectionString);

            var sod = context.TestEntities.SingleOrDefault();
            Assert.IsNull(sod);

            var entity = context.TestEntities.Create();
            entity.SomeString = "An entity";
            context.SaveChanges();
            Assert.AreEqual(1, context.TestEntities.Count());

            var single = context.TestEntities.SingleOrDefault();
            Assert.IsNotNull(single);
            Assert.AreEqual("An entity", single.SomeString);

            for (var i = 1; i < 10; i++)
            {
                var e = context.TestEntities.Create();
                e.SomeInt = i;
            }
            context.SaveChanges();
            Assert.AreEqual(10, context.TestEntities.Count());

            //var sod = context.Entities.SingleOrDefault();
            //Assert.IsNull(sod);

        }