flask/flask/testsuite/basic.py

# -*- coding: utf-8 -*-
"""
    flask.testsuite.basic
    ~~~~~~~~~~~~~~~~~~~~~

    The basic functionality.

    :copyright: (c) 2011 by Armin Ronacher.
    :license: BSD, see LICENSE for more details.
"""
import re
import flask
import unittest
from datetime import datetime
from threading import Thread
from flask.testsuite import FlaskTestCase, emits_module_deprecation_warning
from werkzeug.exceptions import BadRequest, NotFound
from werkzeug.http import parse_date


class BasicFunctionalityTestCase(FlaskTestCase):

    def test_options_work(self):
        app = flask.Flask(__name__)
        @app.route('/', methods=['GET', 'POST'])
        def index():
            return 'Hello World'
        rv = app.test_client().open('/', method='OPTIONS')
        self.assert_equal(sorted(rv.allow), ['GET', 'HEAD', 'OPTIONS', 'POST'])
        self.assert_equal(rv.data, '')

    def test_options_on_multiple_rules(self):
        app = flask.Flask(__name__)
        @app.route('/', methods=['GET', 'POST'])
        def index():
            return 'Hello World'
        @app.route('/', methods=['PUT'])
        def index_put():
            return 'Aha!'
        rv = app.test_client().open('/', method='OPTIONS')
        self.assert_equal(sorted(rv.allow), ['GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'])

    def test_options_handling_disabled(self):
        app = flask.Flask(__name__)
        def index():
            return 'Hello World!'
        index.provide_automatic_options = False
        app.route('/')(index)
        rv = app.test_client().open('/', method='OPTIONS')
        self.assert_equal(rv.status_code, 405)

        app = flask.Flask(__name__)
        def index2():
            return 'Hello World!'
        index2.provide_automatic_options = True
        app.route('/', methods=['OPTIONS'])(index2)
        rv = app.test_client().open('/', method='OPTIONS')
        self.assert_equal(sorted(rv.allow), ['OPTIONS'])

    def test_request_dispatching(self):
        app = flask.Flask(__name__)
        @app.route('/')
        def index():
            return flask.request.method
        @app.route('/more', methods=['GET', 'POST'])
        def more():
            return flask.request.method

        c = app.test_client()
        self.assert_equal(c.get('/').data, 'GET')
        rv = c.post('/')
        self.assert_equal(rv.status_code, 405)
        self.assert_equal(sorted(rv.allow), ['GET', 'HEAD', 'OPTIONS'])
        rv = c.head('/')
        self.assert_equal(rv.status_code, 200)
        self.assert_(not rv.data) # head truncates
        self.assert_equal(c.post('/more').data, 'POST')
        self.assert_equal(c.get('/more').data, 'GET')
        rv = c.delete('/more')
        self.assert_equal(rv.status_code, 405)
        self.assert_equal(sorted(rv.allow), ['GET', 'HEAD', 'OPTIONS', 'POST'])

    def test_url_mapping(self):
        app = flask.Flask(__name__)
        def index():
            return flask.request.method
        def more():
            return flask.request.method

        app.add_url_rule('/', 'index', index)
        app.add_url_rule('/more', 'more', more, methods=['GET', 'POST'])

        c = app.test_client()
        self.assert_equal(c.get('/').data, 'GET')
        rv = c.post('/')
        self.assert_equal(rv.status_code, 405)
        self.assert_equal(sorted(rv.allow), ['GET', 'HEAD', 'OPTIONS'])
        rv = c.head('/')
        self.assert_equal(rv.status_code, 200)
        self.assert_(not rv.data) # head truncates
        self.assert_equal(c.post('/more').data, 'POST')
        self.assert_equal(c.get('/more').data, 'GET')
        rv = c.delete('/more')
        self.assert_equal(rv.status_code, 405)
        self.assert_equal(sorted(rv.allow), ['GET', 'HEAD', 'OPTIONS', 'POST'])

    def test_werkzeug_routing(self):
        from werkzeug.routing import Submount, Rule
        app = flask.Flask(__name__)
        app.url_map.add(Submount('/foo', [
            Rule('/bar', endpoint='bar'),
            Rule('/', endpoint='index')
        ]))
        def bar():
            return 'bar'
        def index():
            return 'index'
        app.view_functions['bar'] = bar
        app.view_functions['index'] = index

        c = app.test_client()
        self.assert_equal(c.get('/foo/').data, 'index')
        self.assert_equal(c.get('/foo/bar').data, 'bar')

    def test_endpoint_decorator(self):
        from werkzeug.routing import Submount, Rule
        app = flask.Flask(__name__)
        app.url_map.add(Submount('/foo', [
            Rule('/bar', endpoint='bar'),
            Rule('/', endpoint='index')
        ]))

        @app.endpoint('bar')
        def bar():
            return 'bar'

        @app.endpoint('index')
        def index():
            return 'index'

        c = app.test_client()
        self.assert_equal(c.get('/foo/').data, 'index')
        self.assert_equal(c.get('/foo/bar').data, 'bar')

    def test_session(self):
        app = flask.Flask(__name__)
        app.secret_key = 'testkey'
        @app.route('/set', methods=['POST'])
        def set():
            flask.session['value'] = flask.request.form['value']
            return 'value set'
        @app.route('/get')
        def get():
            return flask.session['value']

        c = app.test_client()
        self.assert_equal(c.post('/set', data={'value': '42'}).data, 'value set')
        self.assert_equal(c.get('/get').data, '42')

    def test_session_using_server_name(self):
        app = flask.Flask(__name__)
        app.config.update(
            SECRET_KEY='foo',
            SERVER_NAME='example.com'
        )
        @app.route('/')
        def index():
            flask.session['testing'] = 42
            return 'Hello World'
        rv = app.test_client().get('/', 'http://example.com/')
        self.assert_('domain=.example.com' in rv.headers['set-cookie'].lower())
        self.assert_('httponly' in rv.headers['set-cookie'].lower())

    def test_session_using_server_name_and_port(self):
        app = flask.Flask(__name__)
        app.config.update(
            SECRET_KEY='foo',
            SERVER_NAME='example.com:8080'
        )
        @app.route('/')
        def index():
            flask.session['testing'] = 42
            return 'Hello World'
        rv = app.test_client().get('/', 'http://example.com:8080/')
        self.assert_('domain=.example.com' in rv.headers['set-cookie'].lower())
        self.assert_('httponly' in rv.headers['set-cookie'].lower())

    def test_session_using_application_root(self):
        class PrefixPathMiddleware(object):
            def __init__(self, app, prefix):
                self.app = app
                self.prefix = prefix
            def __call__(self, environ, start_response):
                environ['SCRIPT_NAME'] = self.prefix
                return self.app(environ, start_response)

        app = flask.Flask(__name__)
        app.wsgi_app = PrefixPathMiddleware(app.wsgi_app, '/bar')
        app.config.update(
            SECRET_KEY='foo',
            APPLICATION_ROOT='/bar'
        )
        @app.route('/')
        def index():
            flask.session['testing'] = 42
            return 'Hello World'
        rv = app.test_client().get('/', 'http://example.com:8080/')
        self.assert_('path=/bar' in rv.headers['set-cookie'].lower())

    def test_session_using_session_settings(self):
        app = flask.Flask(__name__)
        app.config.update(
            SECRET_KEY='foo',
            SERVER_NAME='www.example.com:8080',
            APPLICATION_ROOT='/test',
            SESSION_COOKIE_DOMAIN='.example.com',
            SESSION_COOKIE_HTTPONLY=False,
            SESSION_COOKIE_SECURE=True,
            SESSION_COOKIE_PATH='/'
        )
        @app.route('/')
        def index():
            flask.session['testing'] = 42
            return 'Hello World'
        rv = app.test_client().get('/', 'http://www.example.com:8080/test/')
        cookie = rv.headers['set-cookie'].lower()
        self.assert_('domain=.example.com' in cookie)
        self.assert_('path=/;' in cookie)
        self.assert_('secure' in cookie)
        self.assert_('httponly' not in cookie)

    def test_missing_session(self):
        app = flask.Flask(__name__)
        def expect_exception(f, *args, **kwargs):
            try:
                f(*args, **kwargs)
            except RuntimeError, e:
                self.assert_(e.args and 'session is unavailable' in e.args[0])
            else:
                self.assert_(False, 'expected exception')
        with app.test_request_context():
            self.assert_(flask.session.get('missing_key') is None)
            expect_exception(flask.session.__setitem__, 'foo', 42)
            expect_exception(flask.session.pop, 'foo')

    def test_session_expiration(self):
        permanent = True
        app = flask.Flask(__name__)
        app.secret_key = 'testkey'
        @app.route('/')
        def index():
            flask.session['test'] = 42
            flask.session.permanent = permanent
            return ''

        @app.route('/test')
        def test():
            return unicode(flask.session.permanent)

        client = app.test_client()
        rv = client.get('/')
        self.assert_('set-cookie' in rv.headers)
        match = re.search(r'\bexpires=([^;]+)', rv.headers['set-cookie'])
        expires = parse_date(match.group())
        expected = datetime.utcnow() + app.permanent_session_lifetime
        self.assert_equal(expires.year, expected.year)
        self.assert_equal(expires.month, expected.month)
        self.assert_equal(expires.day, expected.day)

        rv = client.get('/test')
        self.assert_equal(rv.data, 'True')

        permanent = False
        rv = app.test_client().get('/')
        self.assert_('set-cookie' in rv.headers)
        match = re.search(r'\bexpires=([^;]+)', rv.headers['set-cookie'])
        self.assert_(match is None)

    def test_flashes(self):
        app = flask.Flask(__name__)
        app.secret_key = 'testkey'

        with app.test_request_context():
            self.assert_(not flask.session.modified)
            flask.flash('Zap')
            flask.session.modified = False
            flask.flash('Zip')
            self.assert_(flask.session.modified)
            self.assert_equal(list(flask.get_flashed_messages()), ['Zap', 'Zip'])

    def test_extended_flashing(self):
        app = flask.Flask(__name__)
        app.secret_key = 'testkey'

        @app.route('/')
        def index():
            flask.flash(u'Hello World')
            flask.flash(u'Hello World', 'error')
            flask.flash(flask.Markup(u'<em>Testing</em>'), 'warning')
            return ''

        @app.route('/test')
        def test():
            messages = flask.get_flashed_messages(with_categories=True)
            self.assert_equal(len(messages), 3)
            self.assert_equal(messages[0], ('message', u'Hello World'))
            self.assert_equal(messages[1], ('error', u'Hello World'))
            self.assert_equal(messages[2], ('warning', flask.Markup(u'<em>Testing</em>')))
            return ''
            messages = flask.get_flashed_messages()
            self.assert_equal(len(messages), 3)
            self.assert_equal(messages[0], u'Hello World')
            self.assert_equal(messages[1], u'Hello World')
            self.assert_equal(messages[2], flask.Markup(u'<em>Testing</em>'))

        c = app.test_client()
        c.get('/')
        c.get('/test')

    def test_request_processing(self):
        app = flask.Flask(__name__)
        evts = []
        @app.before_request
        def before_request():
            evts.append('before')
        @app.after_request
        def after_request(response):
            response.data += '|after'
            evts.append('after')
            return response
        @app.route('/')
        def index():
            self.assert_('before' in evts)
            self.assert_('after' not in evts)
            return 'request'
        self.assert_('after' not in evts)
        rv = app.test_client().get('/').data
        self.assert_('after' in evts)
        self.assert_equal(rv, 'request|after')

    def test_teardown_request_handler(self):
        called = []
        app = flask.Flask(__name__)
        @app.teardown_request
        def teardown_request(exc):
            called.append(True)
            return "Ignored"
        @app.route('/')
        def root():
            return "Response"
        rv = app.test_client().get('/')
        self.assert_equal(rv.status_code, 200)
        self.assert_('Response' in rv.data)
        self.assert_equal(len(called), 1)

    def test_teardown_request_handler_debug_mode(self):
        called = []
        app = flask.Flask(__name__)
        app.testing = True
        @app.teardown_request
        def teardown_request(exc):
            called.append(True)
            return "Ignored"
        @app.route('/')
        def root():
            return "Response"
        rv = app.test_client().get('/')
        self.assert_equal(rv.status_code, 200)
        self.assert_('Response' in rv.data)
        self.assert_equal(len(called), 1)

    def test_teardown_request_handler_error(self):
        called = []
        app = flask.Flask(__name__)
        @app.teardown_request
        def teardown_request1(exc):
            self.assert_equal(type(exc), ZeroDivisionError)
            called.append(True)
            # This raises a new error and blows away sys.exc_info(), so we can
            # test that all teardown_requests get passed the same original
            # exception.
            try:
                raise TypeError
            except:
                pass
        @app.teardown_request
        def teardown_request2(exc):
            self.assert_equal(type(exc), ZeroDivisionError)
            called.append(True)
            # This raises a new error and blows away sys.exc_info(), so we can
            # test that all teardown_requests get passed the same original
            # exception.
            try:
                raise TypeError
            except:
                pass
        @app.route('/')
        def fails():
            1/0
        rv = app.test_client().get('/')
        self.assert_equal(rv.status_code, 500)
        self.assert_('Internal Server Error' in rv.data)
        self.assert_equal(len(called), 2)

    def test_before_after_request_order(self):
        called = []
        app = flask.Flask(__name__)
        @app.before_request
        def before1():
            called.append(1)
        @app.before_request
        def before2():
            called.append(2)
        @app.after_request
        def after1(response):
            called.append(4)
            return response
        @app.after_request
        def after2(response):
            called.append(3)
            return response
        @app.teardown_request
        def finish1(exc):
            called.append(6)
        @app.teardown_request
        def finish2(exc):
            called.append(5)
        @app.route('/')
        def index():
            return '42'
        rv = app.test_client().get('/')
        self.assert_equal(rv.data, '42')
        self.assert_equal(called, [1, 2, 3, 4, 5, 6])

    def test_error_handling(self):
        app = flask.Flask(__name__)
        @app.errorhandler(404)
        def not_found(e):
            return 'not found', 404
        @app.errorhandler(500)
        def internal_server_error(e):
            return 'internal server error', 500
        @app.route('/')
        def index():
            flask.abort(404)
        @app.route('/error')
        def error():
            1 // 0
        c = app.test_client()
        rv = c.get('/')
        self.assert_equal(rv.status_code, 404)
        self.assert_equal(rv.data, 'not found')
        rv = c.get('/error')
        self.assert_equal(rv.status_code, 500)
        self.assert_equal('internal server error', rv.data)

    def test_before_request_and_routing_errors(self):
        app = flask.Flask(__name__)
        @app.before_request
        def attach_something():
            flask.g.something = 'value'
        @app.errorhandler(404)
        def return_something(error):
            return flask.g.something, 404
        rv = app.test_client().get('/')
        self.assert_equal(rv.status_code, 404)
        self.assert_equal(rv.data, 'value')

    def test_user_error_handling(self):
        class MyException(Exception):
            pass

        app = flask.Flask(__name__)
        @app.errorhandler(MyException)
        def handle_my_exception(e):
            self.assert_(isinstance(e, MyException))
            return '42'
        @app.route('/')
        def index():
            raise MyException()

        c = app.test_client()
        self.assert_equal(c.get('/').data, '42')

    def test_trapping_of_bad_request_key_errors(self):
        app = flask.Flask(__name__)
        app.testing = True
        @app.route('/fail')
        def fail():
            flask.request.form['missing_key']
        c = app.test_client()
        self.assert_equal(c.get('/fail').status_code, 400)

        app.config['TRAP_BAD_REQUEST_ERRORS'] = True
        c = app.test_client()
        try:
            c.get('/fail')
        except KeyError, e:
            self.assert_(isinstance(e, BadRequest))
        else:
            self.fail('Expected exception')

    def test_trapping_of_all_http_exceptions(self):
        app = flask.Flask(__name__)
        app.testing = True
        app.config['TRAP_HTTP_EXCEPTIONS'] = True
        @app.route('/fail')
        def fail():
            flask.abort(404)

        c = app.test_client()
        try:
            c.get('/fail')
        except NotFound, e:
            pass
        else:
            self.fail('Expected exception')

    def test_enctype_debug_helper(self):
        from flask.debughelpers import DebugFilesKeyError
        app = flask.Flask(__name__)
        app.debug = True
        @app.route('/fail', methods=['POST'])
        def index():
            return flask.request.files['foo'].filename

        # with statement is important because we leave an exception on the
        # stack otherwise and we want to ensure that this is not the case
        # to not negatively affect other tests.
        with app.test_client() as c:
            try:
                c.post('/fail', data={'foo': 'index.txt'})
            except DebugFilesKeyError, e:
                self.assert_('no file contents were transmitted' in str(e))
                self.assert_('This was submitted: "index.txt"' in str(e))
            else:
                self.fail('Expected exception')

    def test_teardown_on_pop(self):
        buffer = []
        app = flask.Flask(__name__)
        @app.teardown_request
        def end_of_request(exception):
            buffer.append(exception)

        ctx = app.test_request_context()
        ctx.push()
        self.assert_equal(buffer, [])
        ctx.pop()
        self.assert_equal(buffer, [None])

    def test_response_creation(self):
        app = flask.Flask(__name__)
        @app.route('/unicode')
        def from_unicode():
            return u'Hällo Wörld'
        @app.route('/string')
        def from_string():
            return u'Hällo Wörld'.encode('utf-8')
        @app.route('/args')
        def from_tuple():
            return 'Meh', 400, {'X-Foo': 'Testing'}, 'text/plain'
        c = app.test_client()
        self.assert_equal(c.get('/unicode').data, u'Hällo Wörld'.encode('utf-8'))
        self.assert_equal(c.get('/string').data, u'Hällo Wörld'.encode('utf-8'))
        rv = c.get('/args')
        self.assert_equal(rv.data, 'Meh')
        self.assert_equal(rv.headers['X-Foo'], 'Testing')
        self.assert_equal(rv.status_code, 400)
        self.assert_equal(rv.mimetype, 'text/plain')

    def test_make_response(self):
        app = flask.Flask(__name__)
        with app.test_request_context():
            rv = flask.make_response()
            self.assert_equal(rv.status_code, 200)
            self.assert_equal(rv.data, '')
            self.assert_equal(rv.mimetype, 'text/html')

            rv = flask.make_response('Awesome')
            self.assert_equal(rv.status_code, 200)
            self.assert_equal(rv.data, 'Awesome')
            self.assert_equal(rv.mimetype, 'text/html')

            rv = flask.make_response('W00t', 404)
            self.assert_equal(rv.status_code, 404)
            self.assert_equal(rv.data, 'W00t')
            self.assert_equal(rv.mimetype, 'text/html')

    def test_url_generation(self):
        app = flask.Flask(__name__)
        @app.route('/hello/<name>', methods=['POST'])
        def hello():
            pass
        with app.test_request_context():
            self.assert_equal(flask.url_for('hello', name='test x'), '/hello/test%20x')
            self.assert_equal(flask.url_for('hello', name='test x', _external=True),
                              'http://localhost/hello/test%20x')

    def test_custom_converters(self):
        from werkzeug.routing import BaseConverter
        class ListConverter(BaseConverter):
            def to_python(self, value):
                return value.split(',')
            def to_url(self, value):
                base_to_url = super(ListConverter, self).to_url
                return ','.join(base_to_url(x) for x in value)
        app = flask.Flask(__name__)
        app.url_map.converters['list'] = ListConverter
        @app.route('/<list:args>')
        def index(args):
            return '|'.join(args)
        c = app.test_client()
        self.assert_equal(c.get('/1,2,3').data, '1|2|3')

    def test_static_files(self):
        app = flask.Flask(__name__)
        rv = app.test_client().get('/static/index.html')
        self.assert_equal(rv.status_code, 200)
        self.assert_equal(rv.data.strip(), '<h1>Hello World!</h1>')
        with app.test_request_context():
            self.assert_equal(flask.url_for('static', filename='index.html'),
                              '/static/index.html')

    def test_none_response(self):
        app = flask.Flask(__name__)
        @app.route('/')
        def test():
            return None
        try:
            app.test_client().get('/')
        except ValueError, e:
            self.assert_equal(str(e), 'View function did not return a response')
            pass
        else:
            self.assert_("Expected ValueError")

    def test_request_locals(self):
        self.assert_equal(repr(flask.g), '<LocalProxy unbound>')
        self.assertFalse(flask.g)

    def test_proper_test_request_context(self):
        app = flask.Flask(__name__)
        app.config.update(
            SERVER_NAME='localhost.localdomain:5000'
        )

        @app.route('/')
        def index():
            return None

        @app.route('/', subdomain='foo')
        def sub():
            return None

        with app.test_request_context('/'):
            self.assert_equal(flask.url_for('index', _external=True), 'http://localhost.localdomain:5000/')

        with app.test_request_context('/'):
            self.assert_equal(flask.url_for('sub', _external=True), 'http://foo.localhost.localdomain:5000/')

        try:
            with app.test_request_context('/', environ_overrides={'HTTP_HOST': 'localhost'}):
                pass
        except Exception, e:
            self.assert_(isinstance(e, ValueError))
            self.assert_equal(str(e), "the server name provided " +
                    "('localhost.localdomain:5000') does not match the " + \
                    "server name from the WSGI environment ('localhost')")

        try:
            app.config.update(SERVER_NAME='localhost')
            with app.test_request_context('/', environ_overrides={'SERVER_NAME': 'localhost'}):
                pass
        except ValueError, e:
            raise ValueError(
                "No ValueError exception should have been raised \"%s\"" % e
            )

        try:
            app.config.update(SERVER_NAME='localhost:80')
            with app.test_request_context('/', environ_overrides={'SERVER_NAME': 'localhost:80'}):
                pass
        except ValueError, e:
            raise ValueError(
                "No ValueError exception should have been raised \"%s\"" % e
            )

    def test_test_app_proper_environ(self):
        app = flask.Flask(__name__)
        app.config.update(
            SERVER_NAME='localhost.localdomain:5000'
        )
        @app.route('/')
        def index():
            return 'Foo'

        @app.route('/', subdomain='foo')
        def subdomain():
            return 'Foo SubDomain'

        try:
            rv = app.test_client().get('/')
            self.assert_equal(rv.data, 'Foo')
        except ValueError, e:
            raise ValueError(
                "No ValueError exception should have been raised \"%s\"" % e
            )

        try:
            rv = app.test_client().get('/', 'http://localhost.localdomain:5000')
            self.assert_equal(rv.data, 'Foo')
        except ValueError, e:
            raise ValueError(
                "No ValueError exception should have been raised \"%s\"" % e
            )

        try:
            rv = app.test_client().get('/', 'https://localhost.localdomain:5000')
            self.assert_equal(rv.data, 'Foo')
        except ValueError, e:
            raise ValueError(
                "No ValueError exception should have been raised \"%s\"" % e
            )

        try:
            app.config.update(SERVER_NAME='localhost.localdomain')
            rv = app.test_client().get('/', 'https://localhost.localdomain')
            self.assert_equal(rv.data, 'Foo')
        except ValueError, e:
            raise ValueError(
                "No ValueError exception should have been raised \"%s\"" % e
            )

        try:
            app.config.update(SERVER_NAME='localhost.localdomain:443')
            rv = app.test_client().get('/', 'https://localhost.localdomain')
            self.assert_equal(rv.data, 'Foo')
        except ValueError, e:
            self.assert_equal(str(e), "the server name provided " +
                    "('localhost.localdomain:443') does not match the " + \
                    "server name from the WSGI environment ('localhost.localdomain')")

        try:
            app.config.update(SERVER_NAME='localhost.localdomain')
            app.test_client().get('/', 'http://foo.localhost')
        except ValueError, e:
            self.assert_equal(str(e), "the server name provided " + \
                    "('localhost.localdomain') does not match the " + \
                    "server name from the WSGI environment ('foo.localhost')")

        try:
            rv = app.test_client().get('/', 'http://foo.localhost.localdomain')
            self.assert_equal(rv.data, 'Foo SubDomain')
        except ValueError, e:
            raise ValueError(
                "No ValueError exception should have been raised \"%s\"" % e
            )

    def test_exception_propagation(self):
        def apprunner(configkey):
            app = flask.Flask(__name__)
            @app.route('/')
            def index():
                1/0
            c = app.test_client()
            if config_key is not None:
                app.config[config_key] = True
                try:
                    resp = c.get('/')
                except Exception:
                    pass
                else:
                    self.fail('expected exception')
            else:
                self.assert_equal(c.get('/').status_code, 500)

        # we have to run this test in an isolated thread because if the
        # debug flag is set to true and an exception happens the context is
        # not torn down.  This causes other tests that run after this fail
        # when they expect no exception on the stack.
        for config_key in 'TESTING', 'PROPAGATE_EXCEPTIONS', 'DEBUG', None:
            t = Thread(target=apprunner, args=(config_key,))
            t.start()
            t.join()

    def test_max_content_length(self):
        app = flask.Flask(__name__)
        app.config['MAX_CONTENT_LENGTH'] = 64
        @app.before_request
        def always_first():
            flask.request.form['myfile']
            self.assert_(False)
        @app.route('/accept', methods=['POST'])
        def accept_file():
            flask.request.form['myfile']
            self.assert_(False)
        @app.errorhandler(413)
        def catcher(error):
            return '42'

        c = app.test_client()
        rv = c.post('/accept', data={'myfile': 'foo' * 100})
        self.assert_equal(rv.data, '42')

    def test_url_processors(self):
        app = flask.Flask(__name__)

        @app.url_defaults
        def add_language_code(endpoint, values):
            if flask.g.lang_code is not None and \
               app.url_map.is_endpoint_expecting(endpoint, 'lang_code'):
                values.setdefault('lang_code', flask.g.lang_code)

        @app.url_value_preprocessor
        def pull_lang_code(endpoint, values):
            flask.g.lang_code = values.pop('lang_code', None)

        @app.route('/<lang_code>/')
        def index():
            return flask.url_for('about')

        @app.route('/<lang_code>/about')
        def about():
            return flask.url_for('something_else')

        @app.route('/foo')
        def something_else():
            return flask.url_for('about', lang_code='en')

        c = app.test_client()

        self.assert_equal(c.get('/de/').data, '/de/about')
        self.assert_equal(c.get('/de/about').data, '/foo')
        self.assert_equal(c.get('/foo').data, '/en/about')

    def test_debug_mode_complains_after_first_request(self):
        app = flask.Flask(__name__)
        app.debug = True
        @app.route('/')
        def index():
            return 'Awesome'
        self.assert_(not app.got_first_request)
        self.assert_equal(app.test_client().get('/').data, 'Awesome')
        try:
            @app.route('/foo')
            def broken():
                return 'Meh'
        except AssertionError, e:
            self.assert_('A setup function was called' in str(e))
        else:
            self.fail('Expected exception')

        app.debug = False
        @app.route('/foo')
        def working():
            return 'Meh'
        self.assert_equal(app.test_client().get('/foo').data, 'Meh')
        self.assert_(app.got_first_request)

    def test_before_first_request_functions(self):
        got = []
        app = flask.Flask(__name__)
        @app.before_first_request
        def foo():
            got.append(42)
        c = app.test_client()
        c.get('/')
        self.assert_equal(got, [42])
        c.get('/')
        self.assert_equal(got, [42])
        self.assert_(app.got_first_request)

    def test_routing_redirect_debugging(self):
        app = flask.Flask(__name__)
        app.debug = True
        @app.route('/foo/', methods=['GET', 'POST'])
        def foo():
            return 'success'
        with app.test_client() as c:
            try:
                c.post('/foo', data={})
            except AssertionError, e:
                self.assert_('http://localhost/foo/' in str(e))
                self.assert_('Make sure to directly send your POST-request '
                             'to this URL' in str(e))
            else:
                self.fail('Expected exception')

            rv = c.get('/foo', data={}, follow_redirects=True)
            self.assert_equal(rv.data, 'success')

        app.debug = False
        with app.test_client() as c:
            rv = c.post('/foo', data={}, follow_redirects=True)
            self.assert_equal(rv.data, 'success')

    def test_route_decorator_custom_endpoint(self):
        app = flask.Flask(__name__)
        app.debug = True

        @app.route('/foo/')
        def foo():
            return flask.request.endpoint

        @app.route('/bar/', endpoint='bar')
        def for_bar():
            return flask.request.endpoint

        @app.route('/bar/123', endpoint='123')
        def for_bar_foo():
            return flask.request.endpoint

        with app.test_request_context():
            assert flask.url_for('foo') == '/foo/'
            assert flask.url_for('bar') == '/bar/'
            assert flask.url_for('123') == '/bar/123'

        c = app.test_client()
        self.assertEqual(c.get('/foo/').data, 'foo')
        self.assertEqual(c.get('/bar/').data, 'bar')
        self.assertEqual(c.get('/bar/123').data, '123')


class ContextTestCase(FlaskTestCase):

    def test_context_binding(self):
        app = flask.Flask(__name__)
        @app.route('/')
        def index():
            return 'Hello %s!' % flask.request.args['name']
        @app.route('/meh')
        def meh():
            return flask.request.url

        with app.test_request_context('/?name=World'):
            self.assert_equal(index(), 'Hello World!')
        with app.test_request_context('/meh'):
            self.assert_equal(meh(), 'http://localhost/meh')
        self.assert_(flask._request_ctx_stack.top is None)

    def test_context_test(self):
        app = flask.Flask(__name__)
        self.assert_(not flask.request)
        self.assert_(not flask.has_request_context())
        ctx = app.test_request_context()
        ctx.push()
        try:
            self.assert_(flask.request)
            self.assert_(flask.has_request_context())
        finally:
            ctx.pop()

    def test_manual_context_binding(self):
        app = flask.Flask(__name__)
        @app.route('/')
        def index():
            return 'Hello %s!' % flask.request.args['name']

        ctx = app.test_request_context('/?name=World')
        ctx.push()
        self.assert_equal(index(), 'Hello World!')
        ctx.pop()
        try:
            index()
        except RuntimeError:
            pass
        else:
            self.assert_(0, 'expected runtime error')


class SubdomainTestCase(FlaskTestCase):

    def test_basic_support(self):
        app = flask.Flask(__name__)
        app.config['SERVER_NAME'] = 'localhost'
        @app.route('/')
        def normal_index():
            return 'normal index'
        @app.route('/', subdomain='test')
        def test_index():
            return 'test index'

        c = app.test_client()
        rv = c.get('/', 'http://localhost/')
        self.assert_equal(rv.data, 'normal index')

        rv = c.get('/', 'http://test.localhost/')
        self.assert_equal(rv.data, 'test index')

    @emits_module_deprecation_warning
    def test_module_static_path_subdomain(self):
        app = flask.Flask(__name__)
        app.config['SERVER_NAME'] = 'example.com'
        from subdomaintestmodule import mod
        app.register_module(mod)
        c = app.test_client()
        rv = c.get('/static/hello.txt', 'http://foo.example.com/')
        self.assert_equal(rv.data.strip(), 'Hello Subdomain')

    def test_subdomain_matching(self):
        app = flask.Flask(__name__)
        app.config['SERVER_NAME'] = 'localhost'
        @app.route('/', subdomain='<user>')
        def index(user):
            return 'index for %s' % user

        c = app.test_client()
        rv = c.get('/', 'http://mitsuhiko.localhost/')
        self.assert_equal(rv.data, 'index for mitsuhiko')

    def test_subdomain_matching_with_ports(self):
        app = flask.Flask(__name__)
        app.config['SERVER_NAME'] = 'localhost:3000'
        @app.route('/', subdomain='<user>')
        def index(user):
            return 'index for %s' % user

        c = app.test_client()
        rv = c.get('/', 'http://mitsuhiko.localhost:3000/')
        self.assert_equal(rv.data, 'index for mitsuhiko')

    @emits_module_deprecation_warning
    def test_module_subdomain_support(self):
        app = flask.Flask(__name__)
        mod = flask.Module(__name__, 'test', subdomain='testing')
        app.config['SERVER_NAME'] = 'localhost'

        @mod.route('/test')
        def test():
            return 'Test'

        @mod.route('/outside', subdomain='xtesting')
        def bar():
            return 'Outside'

        app.register_module(mod)

        c = app.test_client()
        rv = c.get('/test', 'http://testing.localhost/')
        self.assert_equal(rv.data, 'Test')
        rv = c.get('/outside', 'http://xtesting.localhost/')
        self.assert_equal(rv.data, 'Outside')


def suite():
    suite = unittest.TestSuite()
    suite.addTest(unittest.makeSuite(BasicFunctionalityTestCase))
    suite.addTest(unittest.makeSuite(ContextTestCase))
    suite.addTest(unittest.makeSuite(SubdomainTestCase))
    return suite