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

        public async Task ShouldJoinMapIndexes()
        {
            _store.RegisterIndexes<PersonIndexProvider>();
            _store.RegisterIndexes<PersonAgeIndexProvider>();

            using (var session = _store.CreateSession())
            {
                var bill = new Person
                {
                    Firstname = "Bill",
                    Age = 1
                };

                var steve = new Person
                {
                    Firstname = "Steve",
                    Age = 2
                };

                var paul = new Person
                {
                    Firstname = "Paul",
                    Age = 2
                };

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

            using (var session = _store.CreateSession())
            {
                Assert.Equal(3, await session.QueryIndexAsync<PersonByName>().Count());
                Assert.Equal(2, await session.QueryIndexAsync<PersonByAge>(x => x.Age == 2).Count());
                Assert.Equal(1, await session.QueryAsync().For<Person>()
                    .With<PersonByName>(x => x.Name == "Steve")
                    .With<PersonByAge>(x => x.Age == 2)
                    .Count());
            }
        }