https://airflow.apache.org/docs/apache-airflow/stable/configurations-ref.html#store-dag-code

![Captura de pantalla 2021-05-26 a las 17 47 56](https://user-images.githubusercontent.com/11339132/119691160-a2049a00-be4a-11eb-8f55-0ad2c6117620.png)

The Default is True or None?
tests/core/test_configuration.py
with io.StringIO() as string_file:
            conf.write(string_file)
            content = string_file.getvalue()
        assert "dags_folder = /tmp/test_folder" in content
    def test_run_command(self):
        write = r'sys.stdout.buffer.write("\u1000foo".encode("utf8"))'
        cmd = f'import sys; {write}; sys.stdout.flush()'
        assert run_command(f"python -c '{cmd}'") == '\u1000foo'
        assert run_command('echo "foo bar"') == 'foo bar\n'
        with pytest.raises(AirflowConfigException):
            run_command('bash -c "exit 1"')
    def test_confirm_unittest_mod(self):
        assert conf.get('core', 'unit_test_mode')
    @conf_vars({("core", "store_serialized_dags"): "True"})
    def test_store_dag_code_default_config(self):
        store_serialized_dags = conf.getboolean('core', 'store_serialized_dags', fallback=False)
        store_dag_code = conf.getboolean("core", "store_dag_code", fallback=store_serialized_dags)
        assert not conf.has_option("core", "store_dag_code")
        assert store_serialized_dags
        assert store_dag_code
    @conf_vars({("core", "store_serialized_dags"): "True", ("core", "store_dag_code"): "False"})
    def test_store_dag_code_config_when_set(self):
        store_serialized_dags = conf.getboolean('core', 'store_serialized_dags', fallback=False)
        store_dag_code = conf.getboolean("core", "store_dag_code", fallback=store_serialized_dags)
        assert conf.has_option("core", "store_dag_code")
        assert store_serialized_dags
        assert not store_dag_code