Npgsql.Tests.CommandTests.PreparedDisposeWithOpenReader C# (CSharp) Method

        public void PreparedDisposeWithOpenReader()
        {
            using (var conn = OpenConnection())
            {
                var cmd1 = new NpgsqlCommand("SELECT 1", conn);
                var cmd2 = new NpgsqlCommand("SELECT 1", conn);
                cmd1.Prepare();
                cmd2.Prepare();
                var reader = cmd2.ExecuteReader();
                reader.Read();
                Assert.That(() => cmd1.Dispose(), Throws.Exception.TypeOf<InvalidOperationException>());
                reader.Close();
                cmd1.Dispose();
                cmd2.Dispose();
                Assert.That(conn.ExecuteScalar("SELECT COUNT(*) FROM pg_prepared_statements"), Is.EqualTo(0));
            }
        }