Python flask 模块，Flask() 实例源码
我们从Python开源项目中，提取了以下50个代码示例，用于说明如何使用flask.Flask()。
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',
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, [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>',
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,
'/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__, 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', '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, '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, 'POST'])
c = app.test_client()
self.assert_equal(c.get('/').data, 'POST'])
def test_endpoint_decorator(self):
from werkzeug.routing import Submount, Rule
app = flask.Flask(__name__)
app.url_map.add(Submount('/foo', 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'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, 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, 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/', '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', 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'<p>Hello World!',
b'<p>Hello World!',
b'<p>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
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