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# -*- coding: utf-8 -*-
"""
flask.testsuite.regression
~~~~~~~~~~~~~~~~~~~~~~~~~~
Tests regressions.
:copyright: (c) 2011 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
"""
import os
import gc
import sys
import flask
import threading
import unittest
from werkzeug.exceptions import NotFound
from flask.testsuite import FlaskTestCase
_gc_lock = threading.Lock()
class _NoLeakAsserter(object):
def __init__(self, testcase):
self.testcase = testcase
def __enter__(self):
gc.disable()
_gc_lock.acquire()
loc = flask._request_ctx_stack._local
# Force Python to track this dictionary at all times.
# This is necessary since Python only starts tracking
# dicts if they contain mutable objects. It's a horrible,
# horrible hack but makes this kinda testable.
loc.__storage__['FOOO'] = [1, 2, 3]
gc.collect()
self.old_objects = len(gc.get_objects())
def __exit__(self, exc_type, exc_value, tb):
if not hasattr(sys, 'getrefcount'):
gc.collect()
new_objects = len(gc.get_objects())
if new_objects > self.old_objects:
self.testcase.fail('Example code leaked')
_gc_lock.release()
gc.enable()
class MemoryTestCase(FlaskTestCase):
def assert_no_leak(self):
return _NoLeakAsserter(self)
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_safe_join_toplevel_pardir(self):
from flask.helpers import safe_join
with self.assert_raises(NotFound):
safe_join('/foo', '..')
class ExceptionTestCase(FlaskTestCase):
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 suite():
suite = unittest.TestSuite()
if os.environ.get('RUN_FLASK_MEMORY_TESTS') == '1':
suite.addTest(unittest.makeSuite(MemoryTestCase))
suite.addTest(unittest.makeSuite(ExceptionTestCase))
return suite
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