Python flask 模块，Flask() 实例源码

def test_default_static_cache_timeout(self):
        app = flask.Flask(__name__)
        class MyBlueprint(flask.Blueprint):
            def get_send_file_max_age(self, filename):
                return 100

        blueprint = MyBlueprint('blueprint', __name__, static_folder='static')
        app.register_blueprint(blueprint)

        # try/finally, in case other tests use this app for Blueprint tests.
        max_age_default = app.config['SEND_FILE_MAX_AGE_DEFAULT']
        try:
            with app.test_request_context():
                unexpected_max_age = 3600
                if app.config['SEND_FILE_MAX_AGE_DEFAULT'] == unexpected_max_age:
                    unexpected_max_age = 7200
                app.config['SEND_FILE_MAX_AGE_DEFAULT'] = unexpected_max_age
                rv = blueprint.send_static_file('index.html')
                cc = parse_cache_control_header(rv.headers['Cache-Control'])
                self.assert_equal(cc.max_age, 100)
                rv.close()
        finally:
            app.config['SEND_FILE_MAX_AGE_DEFAULT'] = max_age_default

def test_test_client_context_binding(self):
        app = flask.Flask(__name__)
        @app.route('/')
        def index():
            flask.g.value = 42
            return 'Hello World!'

        @app.route('/other')
        def other():
            1 // 0

        with app.test_client() as c:
            resp = c.get('/')
            self.assert_equal(flask.g.value, 42)
            self.assert_equal(resp.data, b'Hello World!')
            self.assert_equal(resp.status_code, 200)

            resp = c.get('/other')
            self.assert_false(hasattr(flask.g, 'value'))
            self.assert_in(b'Internal Server Error', resp.data)
            self.assert_equal(resp.status_code, 500)
            flask.g.value = 23

        try:
            flask.g.value
        except (AttributeError, RuntimeError):
            pass
        else:
            raise AssertionError('some kind of exception expected')

def test_blueprint_url_definitions(self):
        bp = flask.Blueprint('test', __name__)

        @bp.route('/foo', defaults={'baz': 42})
        def foo(bar, baz):
            return '%s/%d' % (bar, baz)

        @bp.route('/bar')
        def bar(bar):
            return text_type(bar)

        app = flask.Flask(__name__)
        app.register_blueprint(bp, url_prefix='/1', url_defaults={'bar': 23})
        app.register_blueprint(bp, url_prefix='/2', url_defaults={'bar': 19})

        c = app.test_client()
        self.assert_equal(c.get('/1/foo').data, b'23/42')
        self.assert_equal(c.get('/2/foo').data, b'19/42')
        self.assert_equal(c.get('/1/bar').data, b'23')
        self.assert_equal(c.get('/2/bar').data, b'19')

def test_dotted_names_from_app(self):
        app = flask.Flask(__name__)
        app.testing = True
        test = flask.Blueprint('test', __name__)

        @app.route('/')
        def app_index():
            return flask.url_for('test.index')

        @test.route('/test/')
        def index():
            return flask.url_for('app_index')

        app.register_blueprint(test)

        with app.test_client() as c:
            rv = c.get('/')
            self.assert_equal(rv.data, b'/test/')

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, b'value')

def test_inject_blueprint_url_defaults(self):
        app = flask.Flask(__name__)
        bp = flask.Blueprint('foo.bar.baz', __name__,
                       template_folder='template')

        @bp.url_defaults
        def bp_defaults(endpoint, values):
            values['page'] = 'login'
        @bp.route('/<page>')
        def view(page): pass

        app.register_blueprint(bp)

        values = dict()
        app.inject_url_defaults('foo.bar.baz.view', values)
        expected = dict(page='login')
        self.assert_equal(values, expected)

        with app.test_request_context('/somepage'):
            url = flask.url_for('foo.bar.baz.view')
        expected = '/login'
        self.assert_equal(url, expected)

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_true(0, 'expected runtime error')

def WaitForFileServerToStart(port):
    """
    Wait for the Flask file server to start up.  Test it by trying the
    PyUpdater update URL, e.g. http://127.0.0.1:12345.  If we receive
    a ConnectionError, we continue waiting, but if we receive an HTTP
    response code (404), we return True.  For a frozen app, e.g. a
    Mac .app bundle, the location of the updates must be supplied by
    an environment variable, whereas when running from the source repo,
    the location of the updates is likely to be ./pyu-data/deploy/
    """
    url = 'http://%s:%s/fileserver-is-ready' % (LOCALHOST, port)
    attempts = 0
    while True:
        try:
            attempts += 1
            requests.get(url, timeout=1)
            return True
        except requests.exceptions.ConnectionError:
            time.sleep(0.25)
            if attempts > 10:
                logger.warning("WaitForFileServerToStart: timeout")
                return

def create_app():
    app = Flask(__name__)
    app.config.from_object(config_dict[FLASK_CONFIGURATION])
    app.secret_key = secret_key
    Bootstrap(app)
    assets = Environment(app)
    js_files = Bundle('justgage.js', 'raphael-2.1.4.min.js', filters='rjsmin', output='gen/minified.js')
    assets.register('js_files', js_files)
    nav.init_app(app)
    from .blueprints import bp
    app.register_blueprint(bp)
    global celery
    celery = make_celery(app)

    @app.errorhandler(404)
    def fournotfour(_):
        return render_template("404page.html"), 404

    @app.errorhandler(500)
    def fivezerozero(_):
        return render_template("500page.html"), 500
    return app

def build_web_app(ctx, name=__name__, debug=False):
    app = Flask(name)
    CORS(app)

    if debug:
        app.debug = debug

    @app.route('/')
    def hello():
        return 'Hello, world!'

    @app.before_request
    def before_request():
        g.repos = ctx.repos
        g.recommendations = ctx.recommendations

    app.register_blueprint(movies_bp)
    app.register_blueprint(users_bp)
    app.register_blueprint(recommendations_bp)
    app.register_blueprint(populate_bp)

    return app

def create_app(config_name):
    app = Flask(__name__)#, static_url_path='/app/static')
    app.config.from_object(config[config_name])
    config[config_name].init_app(app)

    from .main import main as main_blueprint
    app.register_blueprint(main_blueprint)

    from .admin import admin as admin_blueprint
    app.register_blueprint(admin_blueprint, url_prefix='/admin')


    db.init_app(app)
    login_manager.init_app(app)

    return app

def test_session_transactions(self):
        app = flask.Flask(__name__)
        app.testing = True
        app.secret_key = 'testing'

        @app.route('/')
        def index():
            return text_type(flask.session['foo'])

        with app.test_client() as c:
            with c.session_transaction() as sess:
                self.assert_equal(len(sess), 0)
                sess['foo'] = [42]
                self.assert_equal(len(sess), 1)
            rv = c.get('/')
            self.assert_equal(rv.data, b'[42]')
            with c.session_transaction() as sess:
                self.assert_equal(len(sess), 1)
                self.assert_equal(sess['foo'], [42])

def test_test_client_calls_teardown_handlers(self):
        app = flask.Flask(__name__)
        called = []
        @app.teardown_request
        def remember(error):
            called.append(error)

        with app.test_client() as c:
            self.assert_equal(called, [])
            c.get('/')
            self.assert_equal(called, [])
        self.assert_equal(called, [None])

        del called[:]
        with app.test_client() as c:
            self.assert_equal(called, [])
            c.get('/')
            self.assert_equal(called, [])
            c.get('/')
            self.assert_equal(called, [None])
        self.assert_equal(called, [None, None])

def test_send_file_xsendfile(self):
        app = flask.Flask(__name__)
        app.use_x_sendfile = True
        with app.test_request_context():
            rv = flask.send_file('static/index.html')
            self.assert_true(rv.direct_passthrough)
            self.assert_in('x-sendfile', rv.headers)
            self.assert_equal(rv.headers['x-sendfile'],
                os.path.join(app.root_path, 'static/index.html'))
            self.assert_equal(rv.mimetype, 'text/html')
            rv.close()

def test_processor_exceptions(self):
        app = flask.Flask(__name__)
        @app.before_request
        def before_request():
            if trigger == 'before':
                1 // 0
        @app.after_request
        def after_request(response):
            if trigger == 'after':
                1 // 0
            return response
        @app.route('/')
        def index():
            return 'Foo'
        @app.errorhandler(500)
        def internal_server_error(e):
            return 'Hello Server Error', 500
        for trigger in 'before', 'after':
            rv = app.test_client().get('/')
            self.assert_equal(rv.status_code, 500)
            self.assert_equal(rv.data, b'Hello Server Error')

def test_url_with_method(self):
        from flask.views import MethodView
        app = flask.Flask(__name__)
        class MyView(MethodView):
            def get(self, id=None):
                if id is None:
                    return 'List'
                return 'Get %d' % id
            def post(self):
                return 'Create'
        myview = MyView.as_view('myview')
        app.add_url_rule('/myview/', methods=['GET'],
                         view_func=myview)
        app.add_url_rule('/myview/<int:id>', methods=['GET'],
                         view_func=myview)
        app.add_url_rule('/myview/create', methods=['POST'],
                         view_func=myview)

        with app.test_request_context():
            self.assert_equal(flask.url_for('myview', _method='GET'),
                              '/myview/')
            self.assert_equal(flask.url_for('myview', id=42, _method='GET'),
                              '/myview/42')
            self.assert_equal(flask.url_for('myview', _method='POST'),
                              '/myview/create')

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

        class Index(flask.views.MethodView):
            def get(self):
                return 'GET'
            def post(self):
                return 'POST'

        class BetterIndex(Index):
            def delete(self):
                return 'DELETE'

        app.add_url_rule('/', view_func=BetterIndex.as_view('index'))
        c = app.test_client()

        meths = parse_set_header(c.open('/', method='OPTIONS').headers['Allow'])
        self.assert_equal(sorted(meths), ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST'])

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

        def add_x_parachute(f):
            def new_function(*args, **kwargs):
                resp = flask.make_response(f(*args, **kwargs))
                resp.headers['X-Parachute'] = 'awesome'
                return resp
            return new_function

        class Index(flask.views.View):
            decorators = [add_x_parachute]
            def dispatch_request(self):
                return 'Awesome'

        app.add_url_rule('/', view_func=Index.as_view('index'))
        c = app.test_client()
        rv = c.get('/')
        self.assert_equal(rv.headers['X-Parachute'], 'awesome')
        self.assert_equal(rv.data, b'Awesome')

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

        class Index(flask.views.View):
            methods = ['GET', 'POST']
            def dispatch_request(self):
                return flask.request.method

        app.add_url_rule('/', view_func=Index.as_view('index'))

        with self.assert_raises(AssertionError):
            app.add_url_rule('/', view_func=Index.as_view('index'))

        # But these tests should still pass. We just log a warning.
        self.common_test(app)

def test_basic_module(self):
        app = flask.Flask(__name__)
        admin = flask.Module(__name__, 'admin', url_prefix='/admin')
        @admin.route('/')
        def admin_index():
            return 'admin index'
        @admin.route('/login')
        def admin_login():
            return 'admin login'
        @admin.route('/logout')
        def admin_logout():
            return 'admin logout'
        @app.route('/')
        def index():
            return 'the index'
        app.register_module(admin)
        c = app.test_client()
        self.assert_equal(c.get('/').data, b'the index')
        self.assert_equal(c.get('/admin/').data, b'admin index')
        self.assert_equal(c.get('/admin/login').data, b'admin login')
        self.assert_equal(c.get('/admin/logout').data, b'admin logout')

def test_context_processors(self):
        app = flask.Flask(__name__)
        admin = flask.Module(__name__, 'admin', url_prefix='/admin')
        @app.context_processor
        def inject_all_regular():
            return {'a': 1}
        @admin.context_processor
        def inject_admin():
            return {'b': 2}
        @admin.app_context_processor
        def inject_all_module():
            return {'c': 3}
        @app.route('/')
        def index():
            return flask.render_template_string('{{ a }}{{ b }}{{ c }}')
        @admin.route('/')
        def admin_index():
            return flask.render_template_string('{{ a }}{{ b }}{{ c }}')
        app.register_module(admin)
        c = app.test_client()
        self.assert_equal(c.get('/').data, b'13')
        self.assert_equal(c.get('/admin/').data, b'123')

def test_endpoint_decorator(self):
        from werkzeug.routing import Submount, Rule
        from flask import Module

        app = flask.Flask(__name__)
        app.testing = True
        app.url_map.add(Submount('/foo', [
            Rule('/bar', endpoint='bar'),
            Rule('/', endpoint='index')
        ]))
        module = Module(__name__, __name__)

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

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

        app.register_module(module)

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

def test_dotted_names(self):
        frontend = flask.Blueprint('myapp.frontend', __name__)
        backend = flask.Blueprint('myapp.backend', __name__)

        @frontend.route('/fe')
        def frontend_index():
            return flask.url_for('myapp.backend.backend_index')

        @frontend.route('/fe2')
        def frontend_page2():
            return flask.url_for('.frontend_index')

        @backend.route('/be')
        def backend_index():
            return flask.url_for('myapp.frontend.frontend_index')

        app = flask.Flask(__name__)
        app.register_blueprint(frontend)
        app.register_blueprint(backend)

        c = app.test_client()
        self.assert_equal(c.get('/fe').data.strip(), b'/be')
        self.assert_equal(c.get('/fe2').data.strip(), b'/fe')
        self.assert_equal(c.get('/be').data.strip(), b'/fe')

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, b'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_false(rv.data) # head truncates
        self.assert_equal(c.post('/more').data, b'POST')
        self.assert_equal(c.get('/more').data, b'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, b'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_false(rv.data) # head truncates
        self.assert_equal(c.post('/more').data, b'POST')
        self.assert_equal(c.get('/more').data, b'GET')
        rv = c.delete('/more')
        self.assert_equal(rv.status_code, 405)
        self.assert_equal(sorted(rv.allow), ['GET', 'HEAD', 'OPTIONS', 'POST'])

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, b'index')
        self.assert_equal(c.get('/foo/bar').data, b'bar')

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_in('domain=.example.com', cookie)
        self.assert_in('path=/', cookie)
        self.assert_in('secure', cookie)
        self.assert_not_in('httponly', cookie)

def test_session_stored_last(self):
        app = flask.Flask(__name__)
        app.secret_key = 'development-key'
        app.testing = True

        @app.after_request
        def modify_session(response):
            flask.session['foo'] = 42
            return response
        @app.route('/')
        def dump_session_contents():
            return repr(flask.session.get('foo'))

        c = app.test_client()
        self.assert_equal(c.get('/').data, b'None')
        self.assert_equal(c.get('/').data, b'42')

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 += b'|after'
            evts.append('after')
            return response
        @app.route('/')
        def index():
            self.assert_in('before', evts)
            self.assert_not_in('after', evts)
            return 'request'
        self.assert_not_in('after', evts)
        rv = app.test_client().get('/').data
        self.assert_in('after', evts)
        self.assert_equal(rv, b'request|after')

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, b'not found')
        rv = c.get('/error')
        self.assert_equal(rv.status_code, 500)
        self.assert_equal(b'internal server error', rv.data)

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 as e:
            self.assert_true(isinstance(e, BadRequest))
        else:
            self.fail('Expected exception')

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',
                'Content-Type': 'text/plain; charset=utf-8'
            }
        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, b'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, b'')
            self.assert_equal(rv.mimetype, 'text/html')

            rv = flask.make_response('Awesome')
            self.assert_equal(rv.status_code, 200)
            self.assert_equal(rv.data, b'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, b'W00t')
            self.assert_equal(rv.mimetype, 'text/html')

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

        # Test base case, a URL which results in a BuildError.
        with app.test_request_context():
            self.assertRaises(BuildError, flask.url_for, 'spam')

        # Verify the error is re-raised if not the current exception.
        try:
            with app.test_request_context():
                flask.url_for('spam')
        except BuildError as err:
            error = err
        try:
            raise RuntimeError('Test case where BuildError is not current.')
        except RuntimeError:
            self.assertRaises(BuildError, app.handle_url_build_error, error, 'spam', {})

        # Test a custom handler.
        def handler(error, endpoint, values):
            # Just a test.
            return '/test_handler/'
        app.url_build_error_handlers.append(handler)
        with app.test_request_context():
            self.assert_equal(flask.url_for('spam'), '/test_handler/')

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_true(False)
        @app.route('/accept', methods=['POST'])
        def accept_file():
            flask.request.form['myfile']
            self.assert_true(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, b'42')

def test_debug_mode_complains_after_first_request(self):
        app = flask.Flask(__name__)
        app.debug = True
        @app.route('/')
        def index():
            return 'Awesome'
        self.assert_false(app.got_first_request)
        self.assert_equal(app.test_client().get('/').data, b'Awesome')
        try:
            @app.route('/foo')
            def broken():
                return 'Meh'
        except AssertionError as e:
            self.assert_in('A setup function was called', 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, b'Meh')
        self.assert_true(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 as e:
                self.assert_in('http://localhost/foo/', str(e))
                self.assert_in('Make sure to directly send your POST-request '
                               'to this URL', str(e))
            else:
                self.fail('Expected exception')

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

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

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

        @app.route('/fail')
        def fail_func():
            1 // 0

        c = app.test_client()
        for x in range(3):
            with self.assert_raises(ZeroDivisionError):
                c.get('/fail')

        self.assert_true(flask._request_ctx_stack.top is not None)
        self.assert_true(flask._app_ctx_stack.top is not None)
        # implicit appctx disappears too
        flask._request_ctx_stack.top.pop()
        self.assert_true(flask._request_ctx_stack.top is None)
        self.assert_true(flask._app_ctx_stack.top is None)

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, b'normal index')

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

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

def test_escaping(self):
        text = '<p>Hello World!'
        app = flask.Flask(__name__)
        @app.route('/')
        def index():
            return flask.render_template('escaping_template.html', text=text,
                                         html=flask.Markup(text))
        lines = app.test_client().get('/').data.splitlines()
        self.assert_equal(lines, [
            b'&lt;p&gt;Hello World!',
            b'<p>Hello World!',
            b'<p>Hello World!',
            b'<p>Hello World!',
            b'&lt;p&gt;Hello World!',
            b'<p>Hello World!'
        ])

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

        @app.route('/')
        def index():
            return flask.render_template('simple_template.html', whiskey=42)

        recorded = []
        def record(sender, template, context):
            recorded.append((template, context))

        flask.template_rendered.connect(record, app)
        try:
            app.test_client().get('/')
            self.assert_equal(len(recorded), 1)
            template, context = recorded[0]
            self.assert_equal(template.name, 'simple_template.html')
            self.assert_equal(context['whiskey'], 42)
        finally:
            flask.template_rendered.disconnect(record, app)

def test_request_exception_signal(self):
        app = flask.Flask(__name__)
        recorded = []

        @app.route('/')
        def index():
            1 // 0

        def record(sender, exception):
            recorded.append(exception)

        flask.got_request_exception.connect(record, app)
        try:
            self.assert_equal(app.test_client().get('/').status_code, 500)
            self.assert_equal(len(recorded), 1)
            self.assert_true(isinstance(recorded[0], ZeroDivisionError))
        finally:
            flask.got_request_exception.disconnect(record, app)

def test_appcontext_signals(self):
        app = flask.Flask(__name__)
        recorded = []
        def record_push(sender, **kwargs):
            recorded.append('push')
        def record_pop(sender, **kwargs):
            recorded.append('push')

        @app.route('/')
        def index():
            return 'Hello'

        flask.appcontext_pushed.connect(record_push, app)
        flask.appcontext_popped.connect(record_pop, app)
        try:
            with app.test_client() as c:
                rv = c.get('/')
                self.assert_equal(rv.data, b'Hello')
                self.assert_equal(recorded, ['push'])
            self.assert_equal(recorded, ['push', 'pop'])
        finally:
            flask.appcontext_pushed.disconnect(record_push, app)
            flask.appcontext_popped.disconnect(record_pop, app)

def test_greenlet_context_copying_api(self):
        app = flask.Flask(__name__)
        greenlets = []

        @app.route('/')
        def index():
            reqctx = flask._request_ctx_stack.top.copy()
            @flask.copy_current_request_context
            def g():
                self.assert_true(flask.request)
                self.assert_equal(flask.current_app, app)
                self.assert_equal(flask.request.path, '/')
                self.assert_equal(flask.request.args['foo'], 'bar')
                return 42
            greenlets.append(greenlet(g))
            return 'Hello World!'

        rv = app.test_client().get('/?foo=bar')
        self.assert_equal(rv.data, b'Hello World!')

        result = greenlets[0].run()
        self.assert_equal(result, 42)

    # Disable test if we don't have greenlets available

def test_suppressed_exception_logging(self):
        class SuppressedFlask(flask.Flask):
            def log_exception(self, exc_info):
                pass

        out = StringIO()
        app = SuppressedFlask(__name__)
        app.logger_name = 'flask_tests/test_suppressed_exception_logging'
        app.logger.addHandler(StreamHandler(out))

        @app.route('/')
        def index():
            1 // 0

        rv = app.test_client().get('/')
        self.assert_equal(rv.status_code, 500)
        self.assert_in(b'Internal Server Error', rv.data)

        err = out.getvalue()
        self.assert_equal(err, '')

def test_memory_consumption(self):
        app = flask.Flask(__name__)
        @app.route('/')
        def index():
            return flask.render_template('simple_template.html', whiskey=42)

        def fire():
            with app.test_client() as c:
                rv = c.get('/')
                self.assert_equal(rv.status_code, 200)
                self.assert_equal(rv.data, b'<h1>42</h1>')

        # Trigger caches
        fire()

        # This test only works on CPython 2.7.
        if sys.version_info >= (2, 7) and \
                not hasattr(sys, 'pypy_translation_info'):
            with self.assert_no_leak():
                for x in range(10):
                    fire()

def test_aborting(self):
        class Foo(Exception):
            whatever = 42
        app = flask.Flask(__name__)
        app.testing = True
        @app.errorhandler(Foo)
        def handle_foo(e):
            return str(e.whatever)
        @app.route('/')
        def index():
            raise flask.abort(flask.redirect(flask.url_for('test')))
        @app.route('/test')
        def test():
            raise Foo()

        with app.test_client() as c:
            rv = c.get('/')
            self.assertEqual(rv.headers['Location'], 'http://localhost/test')
            rv = c.get('/test')
            self.assertEqual(rv.data, b'42')

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

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