Source code for cherrypy.test.helper

"""A library of helper functions for the CherryPy test suite."""

import datetime
import io
import logging
import os
import re
import subprocess
import sys
import time
import unittest
import warnings
import contextlib

import portend
import pytest

from cheroot.test import webtest

import cherrypy
from cherrypy._cpcompat import text_or_bytes, HTTPSConnection, ntob
from cherrypy.lib import httputil
from cherrypy.lib import gctools

log = logging.getLogger(__name__)
thisdir = os.path.abspath(os.path.dirname(__file__))
serverpem = os.path.join(os.getcwd(), thisdir, 'test.pem')


[docs]class Supervisor(object): """Base class for modeling and controlling servers during testing.""" def __init__(self, **kwargs): for k, v in kwargs.items(): if k == 'port': setattr(self, k, int(v)) setattr(self, k, v)
[docs]def log_to_stderr(msg, level): return sys.stderr.write(msg + os.linesep)
[docs]class LocalSupervisor(Supervisor): """Base class for modeling/controlling servers which run in the same process. When the server side runs in a different process, start/stop can dump all state between each test module easily. When the server side runs in the same process as the client, however, we have to do a bit more work to ensure config and mounted apps are reset between tests. """ using_apache = False using_wsgi = False def __init__(self, **kwargs): for k, v in kwargs.items(): setattr(self, k, v) cherrypy.server.httpserver = self.httpserver_class # This is perhaps the wrong place for this call but this is the only # place that i've found so far that I KNOW is early enough to set this. cherrypy.config.update({'log.screen': False}) engine = cherrypy.engine if hasattr(engine, 'signal_handler'): engine.signal_handler.subscribe() if hasattr(engine, 'console_control_handler'): engine.console_control_handler.subscribe()
[docs] def start(self, modulename=None): """Load and start the HTTP server.""" if modulename: # Unhook httpserver so cherrypy.server.start() creates a new # one (with config from setup_server, if declared). cherrypy.server.httpserver = None cherrypy.engine.start() self.sync_apps()
[docs] def sync_apps(self): """Tell the server about any apps which the setup functions mounted.""" pass
[docs] def stop(self): td = getattr(self, 'teardown', None) if td: td() cherrypy.engine.exit() servers_copy = list(getattr(cherrypy, 'servers', {}).items()) for name, server in servers_copy: server.unsubscribe() del cherrypy.servers[name]
[docs]class NativeServerSupervisor(LocalSupervisor): """Server supervisor for the builtin HTTP server.""" httpserver_class = 'cherrypy._cpnative_server.CPHTTPServer' using_apache = False using_wsgi = False def __str__(self): return 'Builtin HTTP Server on %s:%s' % (self.host, self.port)
[docs]class LocalWSGISupervisor(LocalSupervisor): """Server supervisor for the builtin WSGI server.""" httpserver_class = 'cherrypy._cpwsgi_server.CPWSGIServer' using_apache = False using_wsgi = True def __str__(self): return 'Builtin WSGI Server on %s:%s' % (self.host, self.port)
[docs] def sync_apps(self): """Hook a new WSGI app into the origin server.""" cherrypy.server.httpserver.wsgi_app = self.get_app()
[docs] def get_app(self, app=None): """Obtain a new (decorated) WSGI app to hook into the origin server.""" if app is None: app = cherrypy.tree if self.validate: try: from wsgiref import validate except ImportError: warnings.warn( 'Error importing wsgiref. The validator will not run.') else: # wraps the app in the validator app = validate.validator(app) return app
[docs]def get_cpmodpy_supervisor(**options): from cherrypy.test import modpy sup = modpy.ModPythonSupervisor(**options) sup.template = modpy.conf_cpmodpy return sup
[docs]def get_modpygw_supervisor(**options): from cherrypy.test import modpy sup = modpy.ModPythonSupervisor(**options) sup.template = modpy.conf_modpython_gateway sup.using_wsgi = True return sup
[docs]def get_modwsgi_supervisor(**options): from cherrypy.test import modwsgi return modwsgi.ModWSGISupervisor(**options)
[docs]def get_modfcgid_supervisor(**options): from cherrypy.test import modfcgid return modfcgid.ModFCGISupervisor(**options)
[docs]def get_modfastcgi_supervisor(**options): from cherrypy.test import modfastcgi return modfastcgi.ModFCGISupervisor(**options)
[docs]def get_wsgi_u_supervisor(**options): cherrypy.server.wsgi_version = ('u', 0) return LocalWSGISupervisor(**options)
[docs]class CPWebCase(webtest.WebCase): script_name = '' scheme = 'http' available_servers = {'wsgi': LocalWSGISupervisor, 'wsgi_u': get_wsgi_u_supervisor, 'native': NativeServerSupervisor, 'cpmodpy': get_cpmodpy_supervisor, 'modpygw': get_modpygw_supervisor, 'modwsgi': get_modwsgi_supervisor, 'modfcgid': get_modfcgid_supervisor, 'modfastcgi': get_modfastcgi_supervisor, } default_server = 'wsgi' @classmethod def _setup_server(cls, supervisor, conf): v = sys.version.split()[0] log.info('Python version used to run this test script: %s' % v) log.info('CherryPy version: %s' % cherrypy.__version__) if supervisor.scheme == 'https': ssl = ' (ssl)' else: ssl = '' log.info('HTTP server version: %s%s' % (supervisor.protocol, ssl)) log.info('PID: %s' % os.getpid()) cherrypy.server.using_apache = supervisor.using_apache cherrypy.server.using_wsgi = supervisor.using_wsgi if sys.platform[:4] == 'java': cherrypy.config.update({'server.nodelay': False}) if isinstance(conf, text_or_bytes): parser = cherrypy.lib.reprconf.Parser() conf = parser.dict_from_file(conf).get('global', {}) else: conf = conf or {} baseconf = conf.copy() baseconf.update({'server.socket_host': supervisor.host, 'server.socket_port': supervisor.port, 'server.protocol_version': supervisor.protocol, 'environment': 'test_suite', }) if supervisor.scheme == 'https': # baseconf['server.ssl_module'] = 'builtin' baseconf['server.ssl_certificate'] = serverpem baseconf['server.ssl_private_key'] = serverpem # helper must be imported lazily so the coverage tool # can run against module-level statements within cherrypy. # Also, we have to do "from cherrypy.test import helper", # exactly like each test module does, because a relative import # would stick a second instance of webtest in sys.modules, # and we wouldn't be able to globally override the port anymore. if supervisor.scheme == 'https': webtest.WebCase.HTTP_CONN = HTTPSConnection return baseconf
[docs] @classmethod def setup_class(cls): '' # Creates a server conf = { 'scheme': 'http', 'protocol': 'HTTP/1.1', 'port': 54583, 'host': '127.0.0.1', 'validate': False, 'server': 'wsgi', } supervisor_factory = cls.available_servers.get( conf.get('server', 'wsgi')) if supervisor_factory is None: raise RuntimeError('Unknown server in config: %s' % conf['server']) supervisor = supervisor_factory(**conf) # Copied from "run_test_suite" cherrypy.config.reset() baseconf = cls._setup_server(supervisor, conf) cherrypy.config.update(baseconf) setup_client() if hasattr(cls, 'setup_server'): # Clear the cherrypy tree and clear the wsgi server so that # it can be updated with the new root cherrypy.tree = cherrypy._cptree.Tree() cherrypy.server.httpserver = None cls.setup_server() # Add a resource for verifying there are no refleaks # to *every* test class. cherrypy.tree.mount(gctools.GCRoot(), '/gc') cls.do_gc_test = True supervisor.start(cls.__module__) cls.supervisor = supervisor
[docs] @classmethod def teardown_class(cls): '' if hasattr(cls, 'setup_server'): cls.supervisor.stop()
do_gc_test = False
[docs] def test_gc(self): if not self.do_gc_test: return self.getPage('/gc/stats') try: self.assertBody('Statistics:') except Exception: 'Failures occur intermittently. See #1420'
[docs] def prefix(self): return self.script_name.rstrip('/')
[docs] def base(self): if ((self.scheme == 'http' and self.PORT == 80) or (self.scheme == 'https' and self.PORT == 443)): port = '' else: port = ':%s' % self.PORT return '%s://%s%s%s' % (self.scheme, self.HOST, port, self.script_name.rstrip('/'))
[docs] def exit(self): sys.exit()
[docs] def getPage(self, url, headers=None, method='GET', body=None, protocol=None, raise_subcls=None): """Open the url. Return status, headers, body. `raise_subcls` must be a tuple with the exceptions classes or a single exception class that are not going to be considered a socket.error regardless that they were are subclass of a socket.error and therefore not considered for a connection retry. """ if self.script_name: url = httputil.urljoin(self.script_name, url) return webtest.WebCase.getPage(self, url, headers, method, body, protocol, raise_subcls)
[docs] def skip(self, msg='skipped '): pytest.skip(msg)
[docs] def assertErrorPage(self, status, message=None, pattern=''): """Compare the response body with a built in error page. The function will optionally look for the regexp pattern, within the exception embedded in the error page.""" # This will never contain a traceback page = cherrypy._cperror.get_error_page(status, message=message) # First, test the response body without checking the traceback. # Stick a match-all group (.*) in to grab the traceback. def esc(text): return re.escape(ntob(text)) epage = re.escape(page) epage = epage.replace( esc('<pre id="traceback"></pre>'), esc('<pre id="traceback">') + b'(.*)' + esc('</pre>')) m = re.match(epage, self.body, re.DOTALL) if not m: self._handlewebError( 'Error page does not match; expected:\n' + page) return # Now test the pattern against the traceback if pattern is None: # Special-case None to mean that there should be *no* traceback. if m and m.group(1): self._handlewebError('Error page contains traceback') else: if (m is None) or ( not re.search(ntob(re.escape(pattern), self.encoding), m.group(1))): msg = 'Error page does not contain %s in traceback' self._handlewebError(msg % repr(pattern))
date_tolerance = 2
[docs] def assertEqualDates(self, dt1, dt2, seconds=None): """Assert abs(dt1 - dt2) is within Y seconds.""" if seconds is None: seconds = self.date_tolerance if dt1 > dt2: diff = dt1 - dt2 else: diff = dt2 - dt1 if not diff < datetime.timedelta(seconds=seconds): raise AssertionError('%r and %r are not within %r seconds.' % (dt1, dt2, seconds))
def _test_method_sorter(_, x, y): """Monkeypatch the test sorter to always run test_gc last in each suite.""" if x == 'test_gc': return 1 if y == 'test_gc': return -1 if x > y: return 1 if x < y: return -1 return 0 unittest.TestLoader.sortTestMethodsUsing = _test_method_sorter
[docs]def setup_client(): """Set up the WebCase classes to match the server's socket settings.""" webtest.WebCase.PORT = cherrypy.server.socket_port webtest.WebCase.HOST = cherrypy.server.socket_host if cherrypy.server.ssl_certificate: CPWebCase.scheme = 'https'
# --------------------------- Spawning helpers --------------------------- #
[docs]class CPProcess(object): pid_file = os.path.join(thisdir, 'test.pid') config_file = os.path.join(thisdir, 'test.conf') config_template = """[global] server.socket_host: '%(host)s' server.socket_port: %(port)s checker.on: False log.screen: False log.error_file: r'%(error_log)s' log.access_file: r'%(access_log)s' %(ssl)s %(extra)s """ error_log = os.path.join(thisdir, 'test.error.log') access_log = os.path.join(thisdir, 'test.access.log') def __init__(self, wait=False, daemonize=False, ssl=False, socket_host=None, socket_port=None): self.wait = wait self.daemonize = daemonize self.ssl = ssl self.host = socket_host or cherrypy.server.socket_host self.port = socket_port or cherrypy.server.socket_port
[docs] def write_conf(self, extra=''): if self.ssl: serverpem = os.path.join(thisdir, 'test.pem') ssl = """ server.ssl_certificate: r'%s' server.ssl_private_key: r'%s' """ % (serverpem, serverpem) else: ssl = '' conf = self.config_template % { 'host': self.host, 'port': self.port, 'error_log': self.error_log, 'access_log': self.access_log, 'ssl': ssl, 'extra': extra, } with io.open(self.config_file, 'w', encoding='utf-8') as f: f.write(str(conf))
[docs] def start(self, imports=None): """Start cherryd in a subprocess.""" portend.free(self.host, self.port, timeout=1) args = [ '-m', 'cherrypy', '-c', self.config_file, '-p', self.pid_file, ] r""" Command for running cherryd server with autoreload enabled Using ``` ['-c', "__requires__ = 'CherryPy'; \ import pkg_resources, re, sys; \ sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0]); \ sys.exit(\ pkg_resources.load_entry_point(\ 'CherryPy', 'console_scripts', 'cherryd')())"] ``` doesn't work as it's impossible to reconstruct the `-c`'s contents. Ref: https://github.com/cherrypy/cherrypy/issues/1545 """ if not isinstance(imports, (list, tuple)): imports = [imports] for i in imports: if i: args.append('-i') args.append(i) if self.daemonize: args.append('-d') env = os.environ.copy() # Make sure we import the cherrypy package in which this module is # defined. grandparentdir = os.path.abspath(os.path.join(thisdir, '..', '..')) if env.get('PYTHONPATH', ''): env['PYTHONPATH'] = os.pathsep.join( (grandparentdir, env['PYTHONPATH'])) else: env['PYTHONPATH'] = grandparentdir self._proc = subprocess.Popen([sys.executable] + args, env=env) if self.wait: self.exit_code = self._proc.wait() else: portend.occupied(self.host, self.port, timeout=5) # Give the engine a wee bit more time to finish STARTING if self.daemonize: time.sleep(2) else: time.sleep(1)
[docs] def get_pid(self): if self.daemonize: return int(open(self.pid_file, 'rb').read()) return self._proc.pid
[docs] def join(self): """Wait for the process to exit.""" if self.daemonize: return self._join_daemon() self._proc.wait()
def _join_daemon(self): with contextlib.suppress(IOError): os.waitpid(self.get_pid(), 0)