Npgsql.Tests.ReaderNewSchemaTests.AllowDBNull C# (CSharp) Method

        public void AllowDBNull()
        {
            using (var conn = OpenConnection())
            {
                conn.ExecuteNonQuery("CREATE TEMP TABLE data (nullable INTEGER, non_nullable INTEGER NOT NULL)");

                using (var cmd = new NpgsqlCommand("SELECT nullable,non_nullable,8 FROM data", conn))
                using (var reader = cmd.ExecuteReader(CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo))
                {
                    var columns = reader.GetColumnSchema();
                    Assert.That(columns[0].AllowDBNull, Is.True);
                    Assert.That(columns[1].AllowDBNull, Is.False);
                    Assert.That(columns[2].AllowDBNull, Is.Null);
                }
            }
        }