MySql.Data.Entity.Tests.RestrictionOperators.Exists C# (CSharp) Method

        public void Exists()
        {
            MySqlDataAdapter da = new MySqlDataAdapter(
                @"SELECT c.* FROM Companies c WHERE EXISTS 
                    (SELECT * FROM Toys t WHERE t.SupplierId=c.Id && t.MinAge < 4)", conn);
            DataTable dt = new DataTable();
            da.Fill(dt);

            using (testEntities context = new testEntities())
            {
                string sql = @"SELECT VALUE c FROM Companies AS c WHERE EXISTS(
                    SELECT p FROM c.Toys AS p WHERE p.MinAge < 4)";
                ObjectQuery<Company> query = context.CreateQuery<Company>(sql);

                int i = 0;
                foreach(Company c in query)
                    Assert.AreEqual(dt.Rows[i++]["id"], c.Id);
            }
        }
    }