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#!/usr/bin/python -t
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330,
# Boston, MA 02111-1307 USA
# This file is part of urlgrabber, a high-level cross-protocol url-grabber
# Copyright 2002-2004 Michael D. Stenner, Ryan Tomayko
"""mirror.py tests"""
# $Id: test_mirror.py,v 1.12 2005/10/22 21:57:27 mstenner Exp $
import sys
import os
import string, tempfile, random, cStringIO, os
import urlgrabber.grabber
from urlgrabber.grabber import URLGrabber, URLGrabError
import urlgrabber.mirror
from urlgrabber.mirror import MirrorGroup, MGRandomStart, MGRandomOrder
from base_test_code import *
class FakeLogger:
def __init__(self):
self.logs = []
def debug(self, msg, *args):
self.logs.append(msg % args)
warn = warning = info = error = debug
class BasicTests(TestCase):
def setUp(self):
self.g = URLGrabber()
fullmirrors = [base_mirror_url + m + '/' for m in good_mirrors]
self.mg = MirrorGroup(self.g, fullmirrors)
def test_urlgrab(self):
"""MirrorGroup.urlgrab"""
filename = tempfile.mktemp()
url = 'short_reference'
self.mg.urlgrab(url, filename)
fo = open(filename)
data = fo.read()
fo.close()
self.assertEqual(data, short_reference_data)
def test_urlread(self):
"""MirrorGroup.urlread"""
url = 'short_reference'
data = self.mg.urlread(url)
self.assertEqual(data, short_reference_data)
def test_urlopen(self):
"""MirrorGroup.urlopen"""
url = 'short_reference'
fo = self.mg.urlopen(url)
data = fo.read()
fo.close()
self.assertEqual(data, short_reference_data)
class SubclassTests(TestCase):
def setUp(self):
self.g = URLGrabber()
self.fullmirrors = [base_mirror_url + m + '/' for m in good_mirrors]
def fetchwith(self, mgclass):
self.mg = mgclass(self.g, self.fullmirrors)
filename = tempfile.mktemp()
url = 'short_reference'
self.mg.urlgrab(url, filename)
fo = open(filename)
data = fo.read()
fo.close()
self.assertEqual(data, short_reference_data)
def test_MGRandomStart(self):
"MGRandomStart.urlgrab"
self.fetchwith(MGRandomStart)
def test_MGRandomOrder(self):
"MGRandomOrder.urlgrab"
self.fetchwith(MGRandomOrder)
class CallbackTests(TestCase):
def setUp(self):
self.g = URLGrabber()
fullmirrors = [base_mirror_url + m + '/' for m in \
(bad_mirrors + good_mirrors)]
self.mg = MirrorGroup(self.g, fullmirrors)
def test_failure_callback(self):
"test that MG executes the failure callback correctly"
tricky_list = []
def failure_callback(cb_obj, tl):
tl.append(str(cb_obj.exception))
self.mg.failure_callback = failure_callback, (tricky_list, ), {}
data = self.mg.urlread('reference')
self.assert_(data == reference_data)
self.assertEquals(tricky_list[0][:25],
'[Errno 14] HTTP Error 403')
def test_callback_reraise(self):
"test that the callback can correctly re-raise the exception"
def failure_callback(cb_obj): raise cb_obj.exception
self.mg.failure_callback = failure_callback
self.assertRaises(URLGrabError, self.mg.urlread, 'reference')
class BadMirrorTests(TestCase):
def setUp(self):
self.g = URLGrabber()
fullmirrors = [base_mirror_url + m + '/' for m in bad_mirrors]
self.mg = MirrorGroup(self.g, fullmirrors)
def test_simple_grab(self):
"""test that a bad mirror raises URLGrabError"""
filename = tempfile.mktemp()
url = 'reference'
self.assertRaises(URLGrabError, self.mg.urlgrab, url, filename)
class FailoverTests(TestCase):
def setUp(self):
self.g = URLGrabber()
fullmirrors = [base_mirror_url + m + '/' for m in \
(bad_mirrors + good_mirrors)]
self.mg = MirrorGroup(self.g, fullmirrors)
def test_simple_grab(self):
"""test that a the MG fails over past a bad mirror"""
filename = tempfile.mktemp()
url = 'reference'
elist = []
def cb(e, elist=elist): elist.append(e)
self.mg.urlgrab(url, filename, failure_callback=cb)
fo = open(filename)
contents = fo.read()
fo.close()
# first be sure that the first mirror failed and that the
# callback was called
self.assertEqual(len(elist), 1)
# now be sure that the second mirror succeeded and the correct
# data was returned
self.assertEqual(contents, reference_data)
class FakeGrabber:
def __init__(self, resultlist=None):
self.resultlist = resultlist or []
self.index = 0
self.calls = []
def urlgrab(self, url, filename=None, **kwargs):
self.calls.append( (url, filename) )
res = self.resultlist[self.index]
self.index += 1
if isinstance(res, Exception): raise res
else: return res
class ActionTests(TestCase):
def setUp(self):
self.snarfed_logs = []
self.db = urlgrabber.mirror.DEBUG
urlgrabber.mirror.DEBUG = FakeLogger()
self.mirrors = ['a', 'b', 'c', 'd', 'e', 'f']
self.g = FakeGrabber([URLGrabError(3), URLGrabError(3), 'filename'])
self.mg = MirrorGroup(self.g, self.mirrors)
def tearDown(self):
urlgrabber.mirror.DEBUG = self.db
def test_defaults(self):
'test default action policy'
self.mg.urlgrab('somefile')
expected_calls = [ (m + '/' + 'somefile', None) \
for m in self.mirrors[:3] ]
expected_logs = \
['MIRROR: trying somefile -> a/somefile',
'MIRROR: failed',
'GR mirrors: [b c d e f] 0',
'MAIN mirrors: [a b c d e f] 1',
'MIRROR: trying somefile -> b/somefile',
'MIRROR: failed',
'GR mirrors: [c d e f] 0',
'MAIN mirrors: [a b c d e f] 2',
'MIRROR: trying somefile -> c/somefile']
self.assertEquals(self.g.calls, expected_calls)
self.assertEquals(urlgrabber.mirror.DEBUG.logs, expected_logs)
def test_instance_action(self):
'test the effects of passed-in default_action'
self.mg.default_action = {'remove_master': 1}
self.mg.urlgrab('somefile')
expected_calls = [ (m + '/' + 'somefile', None) \
for m in self.mirrors[:3] ]
expected_logs = \
['MIRROR: trying somefile -> a/somefile',
'MIRROR: failed',
'GR mirrors: [b c d e f] 0',
'MAIN mirrors: [b c d e f] 0',
'MIRROR: trying somefile -> b/somefile',
'MIRROR: failed',
'GR mirrors: [c d e f] 0',
'MAIN mirrors: [c d e f] 0',
'MIRROR: trying somefile -> c/somefile']
self.assertEquals(self.g.calls, expected_calls)
self.assertEquals(urlgrabber.mirror.DEBUG.logs, expected_logs)
def test_method_action(self):
'test the effects of method-level default_action'
self.mg.urlgrab('somefile', default_action={'remove_master': 1})
expected_calls = [ (m + '/' + 'somefile', None) \
for m in self.mirrors[:3] ]
expected_logs = \
['MIRROR: trying somefile -> a/somefile',
'MIRROR: failed',
'GR mirrors: [b c d e f] 0',
'MAIN mirrors: [b c d e f] 0',
'MIRROR: trying somefile -> b/somefile',
'MIRROR: failed',
'GR mirrors: [c d e f] 0',
'MAIN mirrors: [c d e f] 0',
'MIRROR: trying somefile -> c/somefile']
self.assertEquals(self.g.calls, expected_calls)
self.assertEquals(urlgrabber.mirror.DEBUG.logs, expected_logs)
def callback(self, e): return {'fail': 1}
def test_callback_action(self):
'test the effects of a callback-returned action'
self.assertRaises(URLGrabError, self.mg.urlgrab, 'somefile',
failure_callback=self.callback)
expected_calls = [ (m + '/' + 'somefile', None) \
for m in self.mirrors[:1] ]
expected_logs = \
['MIRROR: trying somefile -> a/somefile',
'MIRROR: failed',
'GR mirrors: [b c d e f] 0',
'MAIN mirrors: [a b c d e f] 1']
self.assertEquals(self.g.calls, expected_calls)
self.assertEquals(urlgrabber.mirror.DEBUG.logs, expected_logs)
def suite():
tl = TestLoader()
return tl.loadTestsFromModule(sys.modules[__name__])
if __name__ == '__main__':
runner = TextTestRunner(stream=sys.stdout,descriptions=1,verbosity=2)
runner.run(suite())
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