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

        public void BadConnection()
        {
            var cmd = new NpgsqlCommand("SELECT 1");
            Assert.That(() => cmd.ExecuteScalar(), Throws.Exception.TypeOf<InvalidOperationException>());

            using (var conn = new NpgsqlConnection(ConnectionString))
            {
                cmd = new NpgsqlCommand("SELECT 1", conn);
                Assert.That(() => cmd.ExecuteScalar(), Throws.Exception.TypeOf<InvalidOperationException>());
            }
        }