Npgsql.Tests.ConnectionTests.WaitBreaksConnection C# (CSharp) Method

        public void WaitBreaksConnection()
        {
            using (var conn = OpenConnection())
            {
                new Timer(o =>
                {
                    using (var conn2 = OpenConnection())
                        conn2.ExecuteNonQuery($"SELECT pg_terminate_backend({conn.ProcessID})");
                }, null, 500, Timeout.Infinite);

                Assert.That(() => conn.Wait(), Throws.Exception
                    .TypeOf<PostgresException>()
                    .With.Property(nameof(PostgresException.SqlState)).EqualTo("57P01")
                );
                Assert.That(conn.FullState, Is.EqualTo(ConnectionState.Broken));
            }
        }