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import sys
import unittest
from html.parser import HTMLParser
from http.client import HTTPConnection
from io import StringIO
from socket import error as socket_error
from time import sleep
from urllib.error import URLError
from urllib.request import Request, urlopen
from pympler.classtracker import ClassTracker
from pympler.garbagegraph import start_debug_garbage, end_debug_garbage
from pympler.process import get_current_thread_id
from pympler.web import start_profiler, start_in_background
from threading import Thread
_server = None
class Trash(object):
pass
class Server(Thread):
def __init__(self):
super(Server, self).__init__()
self.daemon = True
def run(self):
"""
Redirect bottle logging messages so it doesn't clutter the test output
and start the web GUI.
"""
tracker = ClassTracker()
tracker.track_class(Trash)
tracked_trash = Trash()
tracker.create_snapshot()
# XXX Comment this out when troubleshooting failing tests
sys.stdout = StringIO()
sys.stderr = StringIO()
start_profiler(debug=True, quiet=True, tracker=tracker)
class WebGuiTest(unittest.TestCase):
defaulthost = 'localhost:8090'
defaulturl = 'http://' + defaulthost
class LinkChecker(HTMLParser):
def __init__(self):
HTMLParser.__init__(self)
self.errors = 0
def follow(self, link):
if link.startswith('http://'):
return
conn = HTTPConnection(WebGuiTest.defaulthost, timeout=5)
conn.request("GET", link)
response = conn.getresponse()
body = response.read()
conn.close()
if response.status not in [200, 302, 303, 307]:
sys.stderr.write('\nLINK-ERROR: %s, %d, %s' % (link, response.status, response.reason))
if response.status == 500:
sys.stderr.write(body.decode())
self.errors += 1
def handle_starttag(self, tag, attrs):
if tag == 'a':
for name, value in attrs:
if name == 'href':
self.follow(value)
def setUp(self):
"""Use the same server for all tests."""
global _server
if not _server:
_server = Server()
_server.start()
wait = 5
running = False
while not running and wait > 0:
try:
urlopen(WebGuiTest.defaulturl).read()
running = True
except (URLError, socket_error, IOError):
wait -= 1
sleep(1)
def get(self, url, status=200):
conn = HTTPConnection(self.defaulthost, timeout=5)
conn.request("GET", url)
response = conn.getresponse()
body = response.read()
conn.close()
self.assertEqual(response.status, status)
try:
body = body.decode()
except UnicodeDecodeError:
pass
return body
def test_overview(self):
"""Test availability of web gui."""
req = Request(self.defaulturl)
page = str(urlopen(req).read())
self.assertTrue("Process overview" in page)
def test_links(self):
"""Test all linked pages are available."""
req = Request(self.defaulturl)
page = str(urlopen(req).read())
parser = self.LinkChecker()
parser.feed(page)
parser.close()
self.assertEqual(parser.errors, 0)
def test_static_files(self):
"""Test if static files are served."""
for filename in ['style.css']:
self.get('/static/%s' % filename, status=200)
def test_traceback(self):
"""Test if stack traces can be viewed.
First test valid tracebacks, then the invalid ones.
Also check if we can expand the locals of the current stackframe and
access size information of local data (dummy).
"""
class Dummy(object):
pass
dummy = Dummy()
for threadid in sys._current_frames():
resp = self.get('/traceback/%d' % threadid, status=200)
if threadid == get_current_thread_id():
locals_id = id(locals())
self.assertTrue('id="%d' % locals_id in resp, resp)
resp = self.get('/objects/%d' % locals_id, status=200)
self.assertTrue('dummy' in resp, resp)
self.assertTrue('id="%d' % id(dummy) in resp, resp)
self.get('/objects/%d' % id(dummy), status=200)
self.get('/traceback/gabelstapler', status=500)
body = self.get('/traceback/12345', status=200)
self.assertTrue("Cannot retrieve stacktrace for thread 12345" in body, body)
def test_garbage(self):
"""Test if reference cycles can be viewed."""
start_debug_garbage()
try:
body = self.get('/garbage', status=200)
#self.assertTrue('0 reference cycles' in body, body)
cycle = ['spam', 'eggs']
cycle.append(cycle)
del cycle
body = self.get('/garbage', status=200)
#self.assertTrue('0 reference cycles' in body, body)
body = self.get('/refresh', status=303)
body = self.get('/garbage', status=200)
#self.assertTrue('1 reference cycle' in body, body)
self.assertTrue('/garbage/0' in body)
body = self.get('/garbage/0', status=200)
self.assertTrue('/garbage/graph/0' in body, body)
self.assertTrue('/garbage/graph/0?reduce=' in body, body)
body = self.get('/garbage/graph/0', status=200)
body = self.get('/garbage/graph/0?reduce=on', status=200)
finally:
end_debug_garbage()
def test_tracker(self):
resp = self.get('/tracker', status=200)
clsname = '%s.Trash' % (Trash.__module__)
self.assertTrue(clsname in resp, resp)
resp = self.get('/tracker/class/%s' % clsname, status=200)
self.assertTrue('1 instance' in resp, resp)
def test_start_in_background(self):
"""Test server can be started in background mode."""
tracker = ClassTracker()
thread = start_in_background(port=64546, stats=tracker.stats)
self.assertEqual(thread.daemon, True)
if __name__ == "__main__":
suite = unittest.TestSuite()
tclasses = [WebGuiTest]
for tclass in tclasses:
names = unittest.getTestCaseNames(tclass, 'test_')
suite.addTests(map(tclass, names))
if not unittest.TextTestRunner().run(suite).wasSuccessful():
sys.exit(1)
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