flask/tests/test_config.py

# -*- coding: utf-8 -*-
"""
    tests.test_config
    ~~~~~~~~~~~~~~~~~

    :copyright: (c) 2014 by the Flask Team, see AUTHORS for more details.
    :license: BSD, see LICENSE for more details.
"""

import pytest

import os
import flask


# config keys used for the TestConfig
TEST_KEY = 'foo'
SECRET_KEY = 'devkey'


def common_object_test(app):
    assert app.secret_key == 'devkey'
    assert app.config['TEST_KEY'] == 'foo'
    assert 'TestConfig' not in app.config


def test_config_from_file():
    app = flask.Flask(__name__)
    app.config.from_pyfile(__file__.rsplit('.', 1)[0] + '.py')
    common_object_test(app)


def test_config_from_object():
    app = flask.Flask(__name__)
    app.config.from_object(__name__)
    common_object_test(app)


def test_config_from_json():
    app = flask.Flask(__name__)
    current_dir = os.path.dirname(os.path.abspath(__file__))
    app.config.from_json(os.path.join(current_dir, 'static', 'config.json'))
    common_object_test(app)


def test_config_from_mapping():
    app = flask.Flask(__name__)
    app.config.from_mapping({
        'SECRET_KEY': 'devkey',
        'TEST_KEY': 'foo'
    })
    common_object_test(app)

    app = flask.Flask(__name__)
    app.config.from_mapping([
        ('SECRET_KEY', 'devkey'),
        ('TEST_KEY', 'foo')
    ])
    common_object_test(app)

    app = flask.Flask(__name__)
    app.config.from_mapping(
        SECRET_KEY='devkey',
        TEST_KEY='foo'
    )
    common_object_test(app)

    app = flask.Flask(__name__)
    with pytest.raises(TypeError):
        app.config.from_mapping(
            {}, {}
        )


def test_config_from_class():
    class Base(object):
        TEST_KEY = 'foo'

    class Test(Base):
        SECRET_KEY = 'devkey'
    app = flask.Flask(__name__)
    app.config.from_object(Test)
    common_object_test(app)


def test_config_from_envvar():
    env = os.environ
    try:
        os.environ = {}
        app = flask.Flask(__name__)
        try:
            app.config.from_envvar('FOO_SETTINGS')
        except RuntimeError as e:
            assert "'FOO_SETTINGS' is not set" in str(e)
        else:
            assert 0, 'expected exception'
        assert not app.config.from_envvar('FOO_SETTINGS', silent=True)

        os.environ = {'FOO_SETTINGS': __file__.rsplit('.', 1)[0] + '.py'}
        assert app.config.from_envvar('FOO_SETTINGS')
        common_object_test(app)
    finally:
        os.environ = env


def test_config_from_envvar_missing():
    env = os.environ
    try:
        os.environ = {'FOO_SETTINGS': 'missing.cfg'}
        try:
            app = flask.Flask(__name__)
            app.config.from_envvar('FOO_SETTINGS')
        except IOError as e:
            msg = str(e)
            assert msg.startswith('[Errno 2] Unable to load configuration '
                                  'file (No such file or directory):')
            assert msg.endswith("missing.cfg'")
        else:
            assert False, 'expected IOError'
        assert not app.config.from_envvar('FOO_SETTINGS', silent=True)
    finally:
        os.environ = env


def test_config_missing():
    app = flask.Flask(__name__)
    try:
        app.config.from_pyfile('missing.cfg')
    except IOError as e:
        msg = str(e)
        assert msg.startswith('[Errno 2] Unable to load configuration '
                              'file (No such file or directory):')
        assert msg.endswith("missing.cfg'")
    else:
        assert 0, 'expected config'
    assert not app.config.from_pyfile('missing.cfg', silent=True)


def test_config_missing_json():
    app = flask.Flask(__name__)
    try:
        app.config.from_json('missing.json')
    except IOError as e:
        msg = str(e)
        assert msg.startswith('[Errno 2] Unable to load configuration '
                              'file (No such file or directory):')
        assert msg.endswith("missing.json'")
    else:
        assert 0, 'expected config'
    assert not app.config.from_json('missing.json', silent=True)


def test_custom_config_class():
    class Config(flask.Config):
        pass

    class Flask(flask.Flask):
        config_class = Config
    app = Flask(__name__)
    assert isinstance(app.config, Config)
    app.config.from_object(__name__)
    common_object_test(app)


def test_session_lifetime():
    app = flask.Flask(__name__)
    app.config['PERMANENT_SESSION_LIFETIME'] = 42
    assert app.permanent_session_lifetime.seconds == 42


def test_get_namespace():
    app = flask.Flask(__name__)
    app.config['FOO_OPTION_1'] = 'foo option 1'
    app.config['FOO_OPTION_2'] = 'foo option 2'
    app.config['BAR_STUFF_1'] = 'bar stuff 1'
    app.config['BAR_STUFF_2'] = 'bar stuff 2'
    foo_options = app.config.get_namespace('FOO_')
    assert 2 == len(foo_options)
    assert 'foo option 1' == foo_options['option_1']
    assert 'foo option 2' == foo_options['option_2']
    bar_options = app.config.get_namespace('BAR_', lowercase=False)
    assert 2 == len(bar_options)
    assert 'bar stuff 1' == bar_options['STUFF_1']
    assert 'bar stuff 2' == bar_options['STUFF_2']