YesSql.Tests.CoreTests.ShouldFilterMapIndexPerCollection C# (CSharp) Method

        public async Task ShouldFilterMapIndexPerCollection()
        {
            await _store.InitializeCollectionAsync("Collection1");

            using (new NamedCollection("Collection1"))
            {
                using (var session = _store.CreateSession())
                {
                    session.ExecuteMigration(schemaBuilder => schemaBuilder
                    .CreateMapIndexTable(nameof(PersonByNameCol), column => column
                        .Column<string>(nameof(PersonByNameCol.Name))
                        )
                    );
                }

                _store.RegisterIndexes<PersonIndexProviderCol>();

                using (var session = _store.CreateSession())
                {
                    var bill = new Person
                    {
                        Firstname = "Bill",
                        Lastname = "Gates",
                    };

                    var steve = new Person
                    {
                        Firstname = "Steve",
                        Lastname = "Balmer"
                    };

                    session.Save(bill);
                    session.Save(steve);
                }

                using (var session = _store.CreateSession())
                {
                    Assert.Equal(2, await session.QueryAsync<Person, PersonByNameCol>().Count());
                    Assert.Equal(1, await session.QueryAsync<Person, PersonByNameCol>(x => x.Name == "Steve").Count());
                    Assert.Equal(1, await session.QueryAsync<Person, PersonByNameCol>().Where(x => x.Name == "Steve").Count());
                }
            }

            // Store a Person in the default collection
            using (var session = _store.CreateSession())
            {
                var satya = new Person
                {
                    Firstname = "Satya",
                    Lastname = "Nadella",
                };

                session.Save(satya);
            }

            // Ensure the index hasn't been altered
            using (var session = _store.CreateSession())
            {
                Assert.Equal(1, await session.QueryAsync<Person>().Count());
                Assert.Equal(2, await session.QueryIndexAsync<PersonByNameCol>().Count());
            }
        }