How to use the freqtrade.configuration.Configuration function in freqtrade

def test_pairlist_resolving():
    arglist = [
        'download-data',
        '--pairs', 'ETH/BTC', 'XRP/BTC',
        '--exchange', 'binance'
    ]

    args = Arguments(arglist).get_parsed_arg()

    configuration = Configuration(args, RunMode.OTHER)
    config = configuration.get_config()

    assert config['pairs'] == ['ETH/BTC', 'XRP/BTC']
    assert config['exchange']['name'] == 'binance'

del conf1['exchange']['key']
    del conf1['exchange']['secret']
    del conf2['exchange']['name']
    conf2['exchange']['pair_whitelist'] += ['NANO/BTC']

    config_files = [conf1, conf2]

    configsmock = MagicMock(side_effect=config_files)
    mocker.patch(
        'freqtrade.configuration.configuration.load_config_file',
        configsmock
    )

    arg_list = ['trade', '-c', 'test_conf.json', '--config', 'test2_conf.json', ]
    args = Arguments(arg_list).get_parsed_arg()
    configuration = Configuration(args)
    validated_conf = configuration.load_config()

    exchange_conf = default_conf['exchange']
    assert validated_conf['exchange']['name'] == exchange_conf['name']
    assert validated_conf['exchange']['key'] == exchange_conf['key']
    assert validated_conf['exchange']['secret'] == exchange_conf['secret']
    assert validated_conf['exchange']['pair_whitelist'] != conf1['exchange']['pair_whitelist']
    assert validated_conf['exchange']['pair_whitelist'] == conf2['exchange']['pair_whitelist']

    assert 'internals' in validated_conf

def test_setup_configuration_without_arguments(mocker, default_conf, caplog) -> None:
    patched_configuration_load_config_file(mocker, default_conf)

    arglist = [
        'backtesting',
        '--config', 'config.json',
        '--strategy', 'DefaultStrategy',
    ]

    args = Arguments(arglist).get_parsed_arg()

    configuration = Configuration(args)
    config = configuration.get_config()
    assert 'max_open_trades' in config
    assert 'stake_currency' in config
    assert 'stake_amount' in config
    assert 'exchange' in config
    assert 'pair_whitelist' in config['exchange']
    assert 'datadir' in config
    assert 'user_data_dir' in config
    assert log_has('Using data directory: {} ...'.format(config['datadir']), caplog)
    assert 'ticker_interval' in config
    assert not log_has('Parameter -i/--ticker-interval detected ...', caplog)

    assert 'position_stacking' not in config
    assert not log_has('Parameter --enable-position-stacking detected ...', caplog)

    assert 'timerange' not in config

def test_pairlist_resolving_fallback(mocker):
    mocker.patch.object(Path, "exists", MagicMock(return_value=True))
    mocker.patch.object(Path, "open", MagicMock(return_value=MagicMock()))
    mocker.patch("freqtrade.configuration.configuration.json_load",
                 MagicMock(return_value=['XRP/BTC', 'ETH/BTC']))
    arglist = [
        'download-data',
        '--exchange', 'binance'
    ]

    args = Arguments(arglist).get_parsed_arg()
    # Fix flaky tests if config.json exists
    args["config"] = None

    configuration = Configuration(args, RunMode.OTHER)
    config = configuration.get_config()

    assert config['pairs'] == ['ETH/BTC', 'XRP/BTC']
    assert config['exchange']['name'] == 'binance'
    assert config['datadir'] == Path.cwd() / "user_data/data/binance"

def setup_configuration(args: Namespace) -> Dict[str, Any]:
    """
    Prepare the configuration for the backtesting
    :param args: Cli args from Arguments()
    :return: Configuration
    """
    configuration = Configuration(args)
    config = configuration.get_config()

    # Ensure we do not use Exchange credentials
    config['exchange']['key'] = ''
    config['exchange']['secret'] = ''

    if config['stake_amount'] == constants.UNLIMITED_STAKE_AMOUNT:
        raise DependencyException('stake amount could not be "%s" for backtesting' %
                                  constants.UNLIMITED_STAKE_AMOUNT)

    return config

configuration = Configuration(args)
    config = configuration.get_config()

    assert config['pairs'] == default_conf['exchange']['pair_whitelist']
    assert config['exchange']['name'] == default_conf['exchange']['name']

    # Override pairs
    arglist = [
        'download-data',
        '--config', 'config.json',
        '--pairs', 'ETH/BTC', 'XRP/BTC',
    ]

    args = Arguments(arglist).get_parsed_arg()

    configuration = Configuration(args)
    config = configuration.get_config()

    assert config['pairs'] == ['ETH/BTC', 'XRP/BTC']
    assert config['exchange']['name'] == default_conf['exchange']['name']

def test_cli_verbose_with_params(default_conf, mocker, caplog) -> None:
    patched_configuration_load_config_file(mocker, default_conf)

    # Prevent setting loggers
    mocker.patch('freqtrade.loggers._set_loggers', MagicMock)
    arglist = ['trade', '-vvv']
    args = Arguments(arglist).get_parsed_arg()

    configuration = Configuration(args)
    validated_conf = configuration.load_config()

    assert validated_conf.get('verbosity') == 3
    assert log_has('Verbosity set to 3', caplog)

def test_hyperopt_with_arguments(mocker, default_conf, caplog) -> None:
    patched_configuration_load_config_file(mocker, default_conf)

    arglist = [
        'hyperopt',
        '--epochs', '10',
        '--spaces', 'all',
    ]
    args = Arguments(arglist).get_parsed_arg()

    configuration = Configuration(args, RunMode.HYPEROPT)
    config = configuration.get_config()

    assert 'epochs' in config
    assert int(config['epochs']) == 10
    assert log_has('Parameter --epochs detected ... Will run Hyperopt with for 10 epochs ...',
                   caplog)

    assert 'spaces' in config
    assert config['spaces'] == ['all']
    assert log_has("Parameter -s/--spaces detected: ['all']", caplog)
    assert "runmode" in config
    assert config['runmode'] == RunMode.HYPEROPT

def setup_utils_configuration(args: Dict[str, Any], method: RunMode) -> Dict[str, Any]:
    """
    Prepare the configuration for utils subcommands
    :param args: Cli args from Arguments()
    :return: Configuration
    """
    configuration = Configuration(args, method)
    config = configuration.get_config()

    # Ensure we do not use Exchange credentials
    remove_credentials(config)

    return config

def setup_configuration(args: Namespace) -> Dict[str, Any]:
    """
    Prepare the configuration for the backtesting
    :param args: Cli args from Arguments()
    :return: Configuration
    """
    configuration = Configuration(args)
    config = configuration.get_config()

    # Ensure we do not use Exchange credentials
    config['exchange']['key'] = ''
    config['exchange']['secret'] = ''

    return config