# -*- coding: utf-8 -*-
"""
flask.testsuite.helpers
~~~~~~~~~~~~~~~~~~~~~~~
Various helpers.
:copyright: (c) 2011 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
"""
import os
import flask
import unittest
from logging import StreamHandler
from flask.testsuite import FlaskTestCase, catch_warnings, catch_stderr
from werkzeug.http import parse_cache_control_header, parse_options_header
from flask._compat import StringIO, text_type
def has_encoding(name):
try:
import codecs
codecs.lookup(name)
return True
except LookupError:
return False
class JSONTestCase(FlaskTestCase):
def test_json_bad_requests(self):
app = flask.Flask(__name__)
@app.route('/json', methods=['POST'])
def return_json():
return flask.jsonify(foo=text_type(flask.request.get_json()))
c = app.test_client()
rv = c.post('/json', data='malformed', content_type='application/json')
self.assert_equal(rv.status_code, 400)
def test_json_body_encoding(self):
app = flask.Flask(__name__)
app.testing = True
@app.route('/')
def index():
return flask.request.get_json()
c = app.test_client()
resp = c.get('/', data=u'"Hällo Wörld"'.encode('iso-8859-15'),
content_type='application/json; charset=iso-8859-15')
self.assert_equal(resp.data, u'Hällo Wörld'.encode('utf-8'))
def test_jsonify(self):
d = dict(a=23, b=42, c=[1, 2, 3])
app = flask.Flask(__name__)
@app.route('/kw')
def return_kwargs():
return flask.jsonify(**d)
@app.route('/dict')
def return_dict():
return flask.jsonify(d)
c = app.test_client()
for url in '/kw', '/dict':
rv = c.get(url)
self.assert_equal(rv.mimetype, 'application/json')
self.assert_equal(flask.json.loads(rv.data), d)
def test_json_as_unicode(self):
app = flask.Flask(__name__)
app.config['JSON_AS_ASCII'] = True
with app.app_context():
rv = flask.json.dumps(u'\N{SNOWMAN}')
self.assert_equal(rv, '"\\u2603"')
app.config['JSON_AS_ASCII'] = False
with app.app_context():
rv = flask.json.dumps(u'\N{SNOWMAN}')
self.assert_equal(rv, u'"\u2603"')
def test_json_attr(self):
app = flask.Flask(__name__)
@app.route('/add', methods=['POST'])
def add():
json = flask.request.get_json()
return text_type(json['a'] + json['b'])
c = app.test_client()
rv = c.post('/add', data=flask.json.dumps({'a': 1, 'b': 2}),
content_type='application/json')
self.assert_equal(rv.data, b'3')
def test_template_escaping(self):
app = flask.Flask(__name__)
render = flask.render_template_string
with app.test_request_context():
rv = flask.json.htmlsafe_dumps('</script>')
self.assert_equal(rv, u'"\\u003c/script\\u003e"')
self.assert_equal(type(rv), text_type)
rv = render('{{ "</script>"|tojson }}')
self.assert_equal(rv, '"\\u003c/script\\u003e"')
rv = render('{{ "<\0/script>"|tojson }}')
self.assert_equal(rv, '"\\u003c\\u0000/script\\u003e"')
rv = render('{{ "<!--<script>"|tojson }}')
self.assert_equal(rv, '"\\u003c!--\\u003cscript\\u003e"')
rv = render('{{ "&"|tojson }}')
self.assert_equal(rv, '"\\u0026"')
def test_json_customization(self):
class X(object):
def __init__(self, val):
self.val = val
class MyEncoder(flask.json.JSONEncoder):
def default(self, o):
if isinstance(o, X):
return '<%d>' % o.val
return flask.json.JSONEncoder.default(self, o)
class MyDecoder(flask.json.JSONDecoder):
def __init__(self, *args, **kwargs):
kwargs.setdefault('object_hook', self.object_hook)
flask.json.JSONDecoder.__init__(self, *args, **kwargs)
def object_hook(self, obj):
if len(obj) == 1 and '_foo' in obj:
return X(obj['_foo'])
return obj
app = flask.Flask(__name__)
app.testing = True
app.json_encoder = MyEncoder
app.json_decoder = MyDecoder
@app.route('/', methods=['POST'])
def index():
return flask.json.dumps(flask.request.get_json()['x'])
c = app.test_client()
rv = c.post('/', data=flask.json.dumps({
'x': {'_foo': 42}
}), content_type='application/json')
self.assertEqual(rv.data, b'"<42>"')
def test_modified_url_encoding(self):
class ModifiedRequest(flask.Request):
url_charset = 'euc-kr'
app = flask.Flask(__name__)
app.testing = True
app.request_class = ModifiedRequest
app.url_map.charset = 'euc-kr'
@app.route('/')
def index():
return flask.request.args['foo']
rv = app.test_client().get(u'/?foo=정상처리'.encode('euc-kr'))
self.assert_equal(rv.status_code, 200)
self.assert_equal(rv.data, u'정상처리'.encode('utf-8'))
if not has_encoding('euc-kr'):
test_modified_url_encoding = None
def test_json_key_sorting(self):
app = flask.Flask(__name__)
app.testing = True
self.assert_equal(app.config['JSON_SORT_KEYS'], True)
d = dict.fromkeys(range(20), 'foo')
@app.route('/')
def index():
return flask.jsonify(values=d)
c = app.test_client()
rv = c.get('/')
lines = [x.strip() for x in rv.data.strip().decode('utf-8').splitlines()]
self.assert_equal(lines, [
'{',
'"values": {',
'"0": "foo",',
'"1": "foo",',
'"2": "foo",',
'"3": "foo",',
'"4": "foo",',
'"5": "foo",',
'"6": "foo",',
'"7": "foo",',
'"8": "foo",',
'"9": "foo",',
'"10": "foo",',
'"11": "foo",',
'"12": "foo",',
'"13": "foo",',
'"14": "foo",',
'"15": "foo",',
'"16": "foo",',
'"17": "foo",',
'"18": "foo",',
'"19": "foo"',
'}',
'}'
])
class SendfileTestCase(FlaskTestCase):
def test_send_file_regular(self):
app = flask.Flask(__name__)
with app.test_request_context():
rv = flask.send_file('static/index.html')
self.assert_true(rv.direct_passthrough)
self.assert_equal(rv.mimetype, 'text/html')
with app.open_resource('static/index.html') as f:
rv.direct_passthrough = False
self.assert_equal(rv.data, f.read())
rv.close()
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_send_file_object(self):
app = flask.Flask(__name__)
with catch_warnings() as captured:
with app.test_request_context():
f = open(os.path.join(app.root_path, 'static/index.html'))
rv = flask.send_file(f)
rv.direct_passthrough = False
with app.open_resource('static/index.html') as f:
self.assert_equal(rv.data, f.read())
self.assert_equal(rv.mimetype, 'text/html')
rv.close()
# mimetypes + etag
self.assert_equal(len(captured), 2)
app.use_x_sendfile = True
with catch_warnings() as captured:
with app.test_request_context():
f = open(os.path.join(app.root_path, 'static/index.html'))
rv = flask.send_file(f)
self.assert_equal(rv.mimetype, 'text/html')
self.assert_in('x-sendfile', rv.headers)
self.assert_equal(rv.headers['x-sendfile'],
os.path.join(app.root_path, 'static/index.html'))
rv.close()
# mimetypes + etag
self.assert_equal(len(captured), 2)
app.use_x_sendfile = False
with app.test_request_context():
with catch_warnings() as captured:
f = StringIO('Test')
rv = flask.send_file(f)
rv.direct_passthrough = False
self.assert_equal(rv.data, b'Test')
self.assert_equal(rv.mimetype, 'application/octet-stream')
rv.close()
# etags
self.assert_equal(len(captured), 1)
with catch_warnings() as captured:
f = StringIO('Test')
rv = flask.send_file(f, mimetype='text/plain')
rv.direct_passthrough = False
self.assert_equal(rv.data, b'Test')
self.assert_equal(rv.mimetype, 'text/plain')
rv.close()
# etags
self.assert_equal(len(captured), 1)
app.use_x_sendfile = True
with catch_warnings() as captured:
with app.test_request_context():
f = StringIO('Test')
rv = flask.send_file(f)
self.assert_not_in('x-sendfile', rv.headers)
rv.close()
# etags
self.assert_equal(len(captured), 1)
def test_attachment(self):
app = flask.Flask(__name__)
with catch_warnings() as captured:
with app.test_request_context():
f = open(os.path.join(app.root_path, 'static/index.html'))
rv = flask.send_file(f, as_attachment=True)
value, options = parse_options_header(rv.headers['Content-Disposition'])
self.assert_equal(value, 'attachment')
rv.close()
# mimetypes + etag
self.assert_equal(len(captured), 2)
with app.test_request_context():
self.assert_equal(options['filename'], 'index.html')
rv = flask.send_file('static/index.html', as_attachment=True)
value, options = parse_options_header(rv.headers['Content-Disposition'])
self.assert_equal(value, 'attachment')
self.assert_equal(options['filename'], 'index.html')
rv.close()
with app.test_request_context():
rv = flask.send_file(StringIO('Test'), as_attachment=True,
attachment_filename='index.txt',
add_etags=False)
self.assert_equal(rv.mimetype, 'text/plain')
value, options = parse_options_header(rv.headers['Content-Disposition'])
self.assert_equal(value, 'attachment')
self.assert_equal(options['filename'], 'index.txt')
rv.close()
def test_static_file(self):
app = flask.Flask(__name__)
# default cache timeout is 12 hours
with app.test_request_context():
# Test with static file handler.
rv = app.send_static_file('index.html')
cc = parse_cache_control_header(rv.headers['Cache-Control'])
self.assert_equal(cc.max_age, 12 * 60 * 60)
rv.close()
# Test again with direct use of send_file utility.
rv = flask.send_file('static/index.html')
cc = parse_cache_control_header(rv.headers['Cache-Control'])
self.assert_equal(cc.max_age, 12 * 60 * 60)
rv.close()
app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 3600
with app.test_request_context():
# Test with static file handler.
rv = app.send_static_file('index.html')
cc = parse_cache_control_header(rv.headers['Cache-Control'])
self.assert_equal(cc.max_age, 3600)
rv.close()
# Test again with direct use of send_file utility.
rv = flask.send_file('static/index.html')
cc = parse_cache_control_header(rv.headers['Cache-Control'])
self.assert_equal(cc.max_age, 3600)
rv.close()
class StaticFileApp(flask.Flask):
def get_send_file_max_age(self, filename):
return 10
app = StaticFileApp(__name__)
with app.test_request_context():
# Test with static file handler.
rv = app.send_static_file('index.html')
cc = parse_cache_control_header(rv.headers['Cache-Control'])
self.assert_equal(cc.max_age, 10)
rv.close()
# Test again with direct use of send_file utility.
rv = flask.send_file('static/index.html')
cc = parse_cache_control_header(rv.headers['Cache-Control'])
self.assert_equal(cc.max_age, 10)
rv.close()
class LoggingTestCase(FlaskTestCase):
def test_logger_cache(self):
app = flask.Flask(__name__)
logger1 = app.logger
self.assert_true(app.logger is logger1)
self.assert_equal(logger1.name, __name__)
app.logger_name = __name__ + '/test_logger_cache'
self.assert_true(app.logger is not logger1)
def test_debug_log(self):
app = flask.Flask(__name__)
app.debug = True
@app.route('/')
def index():
app.logger.warning('the standard library is dead')
app.logger.debug('this is a debug statement')
return ''
@app.route('/exc')
def exc():
1 // 0
with app.test_client() as c:
with catch_stderr() as err:
c.get('/')
out = err.getvalue()
self.assert_in('WARNING in helpers [', out)
self.assert_in(os.path.basename(__file__.rsplit('.', 1)[0] + '.py'), out)
self.assert_in('the standard library is dead', out)
self.assert_in('this is a debug statement', out)
with catch_stderr() as err:
try:
c.get('/exc')
except ZeroDivisionError:
pass
else:
self.assert_true(False, 'debug log ate the exception')
def test_debug_log_override(self):
app = flask.Flask(__name__)
app.debug = True
app.logger_name = 'flask_tests/test_debug_log_override'
app.logger.level = 10
self.assert_equal(app.logger.level, 10)
def test_exception_logging(self):
out = StringIO()
app = flask.Flask(__name__)
app.logger_name = 'flask_tests/test_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_in('Exception on / [GET]', err)
self.assert_in('Traceback (most recent call last):', err)
self.assert_in('1 // 0', err)
self.assert_in('ZeroDivisionError:', err)
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_for_with_anchor(self):
app = flask.Flask(__name__)
@app.route('/')
def index():
return '42'
with app.test_request_context():
self.assert_equal(flask.url_for('index', _anchor='x y'),
'/#x%20y')
def test_url_for_with_scheme(self):
app = flask.Flask(__name__)
@app.route('/')
def index():
return '42'
with app.test_request_context():
self.assert_equal(flask.url_for('index',
_external=True,
_scheme='https'),
'https://localhost/')
def test_url_for_with_scheme_not_external(self):
app = flask.Flask(__name__)
@app.route('/')
def index():
return '42'
with app.test_request_context():
self.assert_raises(ValueError,
flask.url_for,
'index',
_scheme='https')
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')
class NoImportsTestCase(FlaskTestCase):
"""Test Flasks are created without import.
Avoiding ``__import__`` helps create Flask instances where there are errors
at import time. Those runtime errors will be apparent to the user soon
enough, but tools which build Flask instances meta-programmatically benefit
from a Flask which does not ``__import__``. Instead of importing to
retrieve file paths or metadata on a module or package, use the pkgutil and
imp modules in the Python standard library.
"""
def test_name_with_import_error(self):
try:
flask.Flask('importerror')
except NotImplementedError:
self.fail('Flask(import_name) is importing import_name.')
class StreamingTestCase(FlaskTestCase):
def test_streaming_with_context(self):
app = flask.Flask(__name__)
app.testing = True
@app.route('/')
def index():
def generate():
yield 'Hello '
yield flask.request.args['name']
yield '!'
return flask.Response(flask.stream_with_context(generate()))
c = app.test_client()
rv = c.get('/?name=World')
self.assertEqual(rv.data, b'Hello World!')
def test_streaming_with_context_as_decorator(self):
app = flask.Flask(__name__)
app.testing = True
@app.route('/')
def index():
@flask.stream_with_context
def generate():
yield 'Hello '
yield flask.request.args['name']
yield '!'
return flask.Response(generate())
c = app.test_client()
rv = c.get('/?name=World')
self.assertEqual(rv.data, b'Hello World!')
def test_streaming_with_context_and_custom_close(self):
app = flask.Flask(__name__)
app.testing = True
called = []
class Wrapper(object):
def __init__(self, gen):
self._gen = gen
def __iter__(self):
return self
def close(self):
called.append(42)
def __next__(self):
return next(self._gen)
next = __next__
@app.route('/')
def index():
def generate():
yield 'Hello '
yield flask.request.args['name']
yield '!'
return flask.Response(flask.stream_with_context(
Wrapper(generate())))
c = app.test_client()
rv = c.get('/?name=World')
self.assertEqual(rv.data, b'Hello World!')
self.assertEqual(called, [42])
def suite():
suite = unittest.TestSuite()
if flask.json_available:
suite.addTest(unittest.makeSuite(JSONTestCase))
suite.addTest(unittest.makeSuite(SendfileTestCase))
suite.addTest(unittest.makeSuite(LoggingTestCase))
suite.addTest(unittest.makeSuite(NoImportsTestCase))
suite.addTest(unittest.makeSuite(StreamingTestCase))
return suite