Files
cpython/Lib/test/test_robotparser.py
Serhiy Storchaka bc285e5832 gh-138907: Support RFC 9309 in robotparser (GH-138908)
* empty lines are always ignored instead of separating groups
* the "user-agent" line after a rule starts a new group
* groups matching the same user agent are now merged
* the rule with the longest match wins instead of the first matching rule
* in case of equal matches, the “Allow” rule wins over “Disallow”
* special characters “$” and “*” are now supported in rules
* prefer full match for user agent
2026-05-04 18:03:11 +00:00

776 lines
22 KiB
Python

import io
import os
import threading
import unittest
import urllib.robotparser
from test import support
from test.support import socket_helper
from test.support import threading_helper
from http.server import BaseHTTPRequestHandler, HTTPServer
class BaseRobotTest:
robots_txt = ''
agent = 'test_robotparser'
good = []
bad = []
site_maps = None
expected_output = None
def __init_subclass__(cls):
super().__init_subclass__()
# Remove tests that do nothing.
if issubclass(cls, unittest.TestCase):
if not cls.good:
cls.test_good_urls = None
if not cls.bad:
cls.test_bad_urls = None
if cls.expected_output is None:
cls.test_string_formatting = None
def setUp(self):
lines = io.StringIO(self.robots_txt).readlines()
self.parser = urllib.robotparser.RobotFileParser()
self.parser.parse(lines)
def get_agent_and_url(self, url):
if isinstance(url, tuple):
agent, url = url
return agent, url
return self.agent, url
def test_good_urls(self):
for url in self.good:
agent, url = self.get_agent_and_url(url)
with self.subTest(url=url, agent=agent):
self.assertTrue(self.parser.can_fetch(agent, url))
def test_bad_urls(self):
for url in self.bad:
agent, url = self.get_agent_and_url(url)
with self.subTest(url=url, agent=agent):
self.assertFalse(self.parser.can_fetch(agent, url))
def test_site_maps(self):
self.assertEqual(self.parser.site_maps(), self.site_maps)
def test_string_formatting(self):
self.assertEqual(str(self.parser), self.expected_output)
class UserAgentWildcardTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Disallow: /cyberworld/map/ # This is an infinite virtual URL space
Disallow: /tmp/ # these will soon disappear
Disallow: /foo.html
"""
good = ['/', '/test.html']
bad = ['/cyberworld/map/index.html', '/tmp/xxx', '/foo.html']
class SimpleExampleTest(BaseRobotTest, unittest.TestCase):
# Example from RFC 9309, section 5.1.
robots_txt = """\
User-Agent: *
Disallow: *.gif$
Disallow: /example/
Allow: /publications/
User-Agent: foobot
Disallow:/
Allow:/example/page.html
Allow:/example/allowed.gif
User-Agent: barbot
User-Agent: bazbot
Disallow: /example/page.html
User-Agent: quxbot
"""
good = [
'/', '/publications/',
('foobot', '/example/page.html'), ('foobot', '/example/allowed.gif'),
('barbot', '/'), ('barbot', '/example/'),
('barbot', '/example/allowed.gif'),
('barbot', '/example/disallowed.gif'),
('barbot', '/publications/'),
('barbot', '/publications/allowed.gif'),
('bazbot', '/'), ('bazbot', '/example/'),
('bazbot', '/example/allowed.gif'),
('bazbot', '/example/disallowed.gif'),
('bazbot', '/publications/'),
('bazbot', '/publications/allowed.gif'),
('quxbot', '/'), ('quxbot', '/example/'),
('quxbot', '/example/page.html'), ('quxbot', '/example/allowed.gif'),
('quxbot', '/example/disallowed.gif'),
('quxbot', '/publications/'),
('quxbot', '/publications/allowed.gif'),
]
bad = [
'/example/', '/example/page.html', '/example/allowed.gif',
'/example/disallowed.gif',
'/publications/allowed.gif',
('foobot', '/'), ('foobot', '/example/'),
('foobot', '/example/disallowed.gif'),
('foobot', '/publications/'),
('foobot', '/publications/allowed.gif'),
('barbot', '/example/page.html'),
('bazbot', '/example/page.html'),
]
class CrawlDelayAndCustomAgentTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
# robots.txt for http://www.example.com/
User-agent: *
Crawl-delay: 1
Request-rate: 3/15
Disallow: /cyberworld/map/ # This is an infinite virtual URL space
# Cybermapper knows where to go.
User-agent: cybermapper
Disallow:
"""
good = ['/', '/test.html', ('cybermapper', '/cyberworld/map/index.html')]
bad = ['/cyberworld/map/index.html']
class SitemapTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
# robots.txt for http://www.example.com/
User-agent: *
Sitemap: http://www.gstatic.com/s2/sitemaps/profiles-sitemap.xml
Sitemap: http://www.google.com/hostednews/sitemap_index.xml
Request-rate: 3/15
Disallow: /cyberworld/map/ # This is an infinite virtual URL space
"""
good = ['/', '/test.html']
bad = ['/cyberworld/map/index.html']
site_maps = ['http://www.gstatic.com/s2/sitemaps/profiles-sitemap.xml',
'http://www.google.com/hostednews/sitemap_index.xml']
class RejectAllRobotsTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
# go away
User-agent: *
Disallow: /
"""
good = ['/robots.txt']
bad = ['/cyberworld/map/index.html', '/', '/tmp/']
class BaseRequestRateTest(BaseRobotTest):
request_rate = None
crawl_delay = None
def test_request_rate(self):
parser = self.parser
for url in self.good + self.bad:
agent, url = self.get_agent_and_url(url)
with self.subTest(url=url, agent=agent):
self.assertEqual(parser.crawl_delay(agent), self.crawl_delay)
parsed_request_rate = parser.request_rate(agent)
self.assertEqual(parsed_request_rate, self.request_rate)
if self.request_rate is not None:
self.assertIsInstance(
parsed_request_rate,
urllib.robotparser.RequestRate
)
self.assertEqual(
parsed_request_rate.requests,
self.request_rate.requests
)
self.assertEqual(
parsed_request_rate.seconds,
self.request_rate.seconds
)
class EmptyFileTest(BaseRequestRateTest, unittest.TestCase):
robots_txt = ''
good = ['/foo']
expected_output = ''
class CrawlDelayAndRequestRateTest(BaseRequestRateTest, unittest.TestCase):
robots_txt = """\
User-agent: figtree
Crawl-delay: 3
Request-rate: 9/30
Disallow: /tmp
Disallow: /a%3cd.html
Disallow: /a%2fb.html
Disallow: /%7ejoe/index.html
"""
agent = 'figtree'
request_rate = urllib.robotparser.RequestRate(9, 30)
crawl_delay = 3
good = [('figtree', '/foo.html')]
bad = ['/tmp', '/tmp.html', '/tmp/a.html', '/a%3cd.html', '/a%3Cd.html',
'/a%2fb.html', '/~joe/index.html']
class DifferentAgentTest(CrawlDelayAndRequestRateTest):
agent = 'FigTree Robot libwww-perl/5.04'
class InvalidRequestRateTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Disallow: /tmp/
Disallow: /a%3Cd.html
Disallow: /a/b.html
Disallow: /%7ejoe/index.html
Crawl-delay: 3
Request-rate: 9/banana
"""
good = ['/tmp']
bad = ['/tmp/', '/tmp/a.html', '/a%3cd.html', '/a%3Cd.html', '/a/b.html',
'/%7Ejoe/index.html']
crawl_delay = 3
class InvalidCrawlDelayTest(BaseRobotTest, unittest.TestCase):
# From bug report #523041
robots_txt = """\
User-Agent: *
Disallow: /.
Crawl-delay: pears
"""
good = ['/foo.html']
# bug report says "/" should be denied, but that is not in the RFC
bad = []
class AnotherInvalidRequestRateTest(BaseRobotTest, unittest.TestCase):
# also test that Allow and Diasallow works well with each other
robots_txt = """\
User-agent: Googlebot
Allow: /folder1/myfile.html
Disallow: /folder1/
Request-rate: whale/banana
"""
agent = 'Googlebot'
good = ['/folder1/myfile.html']
bad = ['/folder1/anotherfile.html']
class UserAgentOrderingTest(BaseRobotTest, unittest.TestCase):
# the order of User-agent should not matter
robots_txt = """\
User-agent: Googlebot
Disallow: /
Allow: /folder1/
User-agent: Googlebot-Mobile
Allow: /
Disallow: /folder1/
"""
agent = 'Googlebot'
bad = ['/something.jpg']
good = ['/folder1/myfile.html']
class UserAgentGoogleMobileTest(UserAgentOrderingTest):
agent = 'Googlebot-mobile'
bad = ['/folder1/myfile.html']
good = ['/something.jpg']
class LongestMatchTest(BaseRobotTest, unittest.TestCase):
# Based on example from RFC 9309, section 5.2.
robots_txt = """\
User-agent: *
Allow: /example/page/
Disallow: /example/page/disallowed.gif
Allow: /example/
"""
good = ['/example/', '/example/page/']
bad = ['/example/page/disallowed.gif']
class LongestMatchWildcardTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Allow: /example/page/
Disallow: *.gif
Allow: /example/
"""
good = ['/example/', '/example/page/']
bad = ['/example/page/disallowed.gif', '/x.gif']
class AllowWinsEqualMatchTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Disallow: /spam
Allow: /spam
Disallow: /spam
"""
good = ['/spam', '/spam/']
class AllowWinsEqualFullMatchTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Disallow: /spam
Allow: /spam$
Disallow: /spam
Disallow: /eggs$
Allow: /eggs
Disallow: /eggs$
"""
good = ['/spam', '/eggs', '/eggs/']
bad = ['/spam/']
class AllowWinsEqualMatchWildcardTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Disallow: /spam
Allow: *am
Disallow: /spam
Disallow: *gs
Allow: /eggs
Disallow: *gs
"""
good = ['/spam', '/eggs', '/spam/', '/eggs/']
class MergeGroupsTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: spambot
Disallow: /some/path
User-agent: spambot
Disallow: /another/path
"""
agent = 'spambot'
bad = ['/some/path', '/another/path']
class UserAgentStartsGroupTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: spambot
Disallow: /some/path
User-agent: eggsbot
Disallow: /another/path
"""
good = [('spambot', '/'), ('spambot', '/another/path'),
('eggsbot', '/'), ('eggsbot', '/some/path')]
bad = [('spambot', '/some/path'), ('eggsbot', '/another/path')]
expected_output = """\
User-agent: spambot
Disallow: /some/path
User-agent: eggsbot
Disallow: /another/path\
"""
class IgnoreEmptyLinesTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: spambot
User-agent: eggsbot
Disallow: /some/path
Disallow: /another/path
"""
good = [('spambot', '/'), ('eggsbot', '/')]
bad = [
('spambot', '/some/path'), ('spambot', '/another/path'),
('eggsbot', '/some/path'), ('eggsbot', '/another/path'),
]
expected_output = """\
User-agent: spambot
User-agent: eggsbot
Disallow: /some/path
Disallow: /another/path\
"""
class IgnoreRulesWithoutUserAgentTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
Disallow: /some/path
User-agent: *
Disallow: /another/path
"""
good = ['/', '/some/path']
bad = ['/another/path']
expected_output = """\
User-agent: *
Disallow: /another/path\
"""
class EmptyGroupTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Disallow: /some/path
User-agent: spambot
"""
agent = 'spambot'
good = ['/', '/some/path']
expected_output = """\
User-agent: *
Disallow: /some/path
User-agent: spambot
Allow:\
"""
class WeirdPathTest(BaseRobotTest, unittest.TestCase):
robots_txt = f"""\
User-agent: *
Disallow: /a$$$
Disallow: /b$z
Disallow: /c***
Disallow: /d***z
Disallow: /e*$**$$
Disallow: /f*$**$$z
Disallow: /g$*$$**
Disallow: /h$*$$**z
"""
good = ['/ax', '/a$$', '/b', '/bz', '/b$z', '/d', '/f', '/fz',
'/f$$$z', '/fx$y$$z', '/gx', '/g$$$', '/g$x$$y', '/h', '/hz',
'/h$$$z', '/h$x$$yz']
bad = ['/a', '/c', '/cxy', '/dz', '/dxyz', '/dxzy', '/e', '/exy',
'/e$$', '/ex$y$', '/g']
expected_output = """\
User-agent: *
Disallow: /a$
Disallow: /c*
Disallow: /d*z
Disallow: /e*$
Disallow: /g$\
"""
class PathWithManyWildcardsTest(BaseRobotTest, unittest.TestCase):
# This test would take many years if use naive translation to regular
# expression (* -> .*).
N = 50
robots_txt = f"""\
User-agent: *
Disallow: /{'*a'*N}*b
"""
good = ['/' + 'a'*N + 'a']
bad = ['/' + 'a'*N + 'b']
class DisallowQueryStringTest(BaseRobotTest, unittest.TestCase):
# see issue #6325 for details
robots_txt = """\
User-agent: *
Disallow: /some/path?name=value
Disallow: /another/path?
Disallow: /yet/one/path?name=value&more
"""
good = ['/some/path', '/some/path?',
'/some/path%3Fname=value', '/some/path?name%3Dvalue',
'/another/path', '/another/path%3F',
'/yet/one/path?name=value%26more',
'/some/pathxname=value']
bad = ['/some/path?name=value'
'/another/path?', '/another/path?name=value',
'/yet/one/path?name=value&more']
class PercentEncodingTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Disallow: /a1/Z-._~ # unreserved characters
Disallow: /a2/%5A%2D%2E%5F%7E # percent-encoded unreserved characters
Disallow: /u1/%F0%9F%90%8D # percent-encoded ASCII Unicode character
Disallow: /u2/%f0%9f%90%8d
Disallow: /u3/\U0001f40d # raw non-ASCII Unicode character
Disallow: /v1/%F0 # percent-encoded non-ASCII octet
Disallow: /v2/%f0
Disallow: /v3/\udcf0 # raw non-ASCII octet
Disallow: /p1%xy # raw percent
Disallow: /p2%
Disallow: /p3%25xy # percent-encoded percent
Disallow: /p4%2525xy # double percent-encoded percent
Disallow: /john%20smith # space
Disallow: /john doe
Disallow: /trailingspace%20
Disallow: /question%3Fq=v # not query
Disallow: /hash%23f # not fragment
Disallow: /dollar%24
Disallow: /asterisk%2A
Disallow: /sub/dir
Disallow: /slash%2F
Disallow: /query/question?q=%3F
Disallow: /query/raw/question?q=?
Disallow: /query/eq?q%3Dv
Disallow: /query/amp?q=v%26a
"""
good = [
'/u1/%F0', '/u1/%f0',
'/u2/%F0', '/u2/%f0',
'/u3/%F0', '/u3/%f0',
'/p1%2525xy', '/p2%f0', '/p3%2525xy', '/p4%xy', '/p4%25xy',
'/question?q=v',
'/dollar', '/asterisk',
'/query/eq?q=v',
'/query/amp?q=v&a',
]
bad = [
'/a1/Z-._~', '/a1/%5A%2D%2E%5F%7E',
'/a2/Z-._~', '/a2/%5A%2D%2E%5F%7E',
'/u1/%F0%9F%90%8D', '/u1/%f0%9f%90%8d', '/u1/\U0001f40d',
'/u2/%F0%9F%90%8D', '/u2/%f0%9f%90%8d', '/u2/\U0001f40d',
'/u3/%F0%9F%90%8D', '/u3/%f0%9f%90%8d', '/u3/\U0001f40d',
'/v1/%F0', '/v1/%f0', '/v1/\udcf0', '/v1/\U0001f40d',
'/v2/%F0', '/v2/%f0', '/v2/\udcf0', '/v2/\U0001f40d',
'/v3/%F0', '/v3/%f0', '/v3/\udcf0', '/v3/\U0001f40d',
'/p1%xy', '/p1%25xy',
'/p2%', '/p2%25', '/p2%2525', '/p2%xy',
'/p3%xy', '/p3%25xy',
'/p4%2525xy',
'/john%20smith', '/john smith',
'/john%20doe', '/john doe',
'/trailingspace%20', '/trailingspace ',
'/question%3Fq=v',
'/hash#f', '/hash%23f',
'/dollar$', '/dollar%24',
'/asterisk*', '/asterisk%2A',
'/sub/dir', '/sub%2Fdir',
'/slash%2F', '/slash/',
'/query/question?q=?', '/query/question?q=%3F',
'/query/raw/question?q=?', '/query/raw/question?q=%3F',
'/query/eq?q%3Dv',
'/query/amp?q=v%26a',
]
# other reserved characters
for c in ":/#[]@!$&'()*+,;=":
robots_txt += f'Disallow: /raw{c}\nDisallow: /pc%{ord(c):02X}\n'
bad.append(f'/raw{c}')
bad.append(f'/raw%{ord(c):02X}')
bad.append(f'/pc{c}')
bad.append(f'/pc%{ord(c):02X}')
class DefaultEntryTest(BaseRequestRateTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Crawl-delay: 1
Request-rate: 3/15
Disallow: /cyberworld/map/
"""
request_rate = urllib.robotparser.RequestRate(3, 15)
crawl_delay = 1
good = ['/', '/test.html']
bad = ['/cyberworld/map/index.html']
class StringFormattingTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Crawl-delay: 1
Request-rate: 3/15
Disallow: /cyberworld/map/ # This is an infinite virtual URL space
# Cybermapper knows where to go.
User-agent: cybermapper
Disallow: /some/path
"""
expected_output = """\
User-agent: *
Crawl-delay: 1
Request-rate: 3/15
Disallow: /cyberworld/map/
User-agent: cybermapper
Disallow: /some/path\
"""
class ConstructedStringFormattingTest(unittest.TestCase):
def test_empty(self):
parser = urllib.robotparser.RobotFileParser()
self.assertEqual(str(parser), '')
def test_group_without_rules(self):
parser = urllib.robotparser.RobotFileParser()
entry = urllib.robotparser.Entry()
entry.useragents = ['spambot']
parser._add_entry(entry)
entry = urllib.robotparser.Entry()
entry.useragents = ['hambot']
entry.rulelines = [urllib.robotparser.RuleLine('/ham', False)]
parser._add_entry(entry)
entry = urllib.robotparser.Entry()
entry.useragents = ['eggsbot']
parser._add_entry(entry)
self.assertEqual(str(parser), """\
User-agent: spambot
Allow:
User-agent: hambot
Disallow: /ham
User-agent: eggsbot
Allow:\
""")
def test_group_without_user_agent(self):
parser = urllib.robotparser.RobotFileParser()
entry = urllib.robotparser.Entry()
entry.rulelines = [urllib.robotparser.RuleLine('/ham', False)]
parser._add_entry(entry)
entry = urllib.robotparser.Entry()
entry.useragents = ['spambot']
entry.rulelines = [urllib.robotparser.RuleLine('/spam', False)]
parser._add_entry(entry)
entry = urllib.robotparser.Entry()
entry.rulelines = [urllib.robotparser.RuleLine('/eggs', False)]
parser._add_entry(entry)
self.assertEqual(str(parser), """\
User-agent: spambot
Disallow: /spam\
""")
@unittest.skipUnless(
support.has_socket_support,
"Socket server requires working socket."
)
class BaseLocalNetworkTestCase:
def setUp(self):
# clear _opener global variable
self.addCleanup(urllib.request.urlcleanup)
self.server = HTTPServer((socket_helper.HOST, 0), self.RobotHandler)
self.t = threading.Thread(
name='HTTPServer serving',
target=self.server.serve_forever,
# Short poll interval to make the test finish quickly.
# Time between requests is short enough that we won't wake
# up spuriously too many times.
kwargs={'poll_interval':0.01})
self.t.daemon = True # In case this function raises.
self.t.start()
def tearDown(self):
self.server.shutdown()
self.t.join()
self.server.server_close()
SAMPLE_ROBOTS_TXT = b'''\
User-agent: test_robotparser
Disallow: /utf8/\xf0\x9f\x90\x8d
Disallow: /non-utf8/\xf0
Disallow: //[spam]/path
'''
class LocalNetworkTestCase(BaseLocalNetworkTestCase, unittest.TestCase):
class RobotHandler(BaseHTTPRequestHandler):
def do_GET(self):
self.send_response(200)
self.end_headers()
self.wfile.write(SAMPLE_ROBOTS_TXT)
def log_message(self, format, *args):
pass
@threading_helper.reap_threads
def testRead(self):
# Test that reading a weird robots.txt doesn't fail.
addr = self.server.server_address
url = f'http://{socket_helper.HOST}:{addr[1]}'
robots_url = url + '/robots.txt'
parser = urllib.robotparser.RobotFileParser()
parser.set_url(robots_url)
parser.read()
# And it can even interpret the weird paths in some reasonable way.
agent = 'test_robotparser'
self.assertTrue(parser.can_fetch(agent, robots_url))
self.assertTrue(parser.can_fetch(agent, url + '/utf8/'))
self.assertFalse(parser.can_fetch(agent, url + '/utf8/\U0001f40d'))
self.assertFalse(parser.can_fetch(agent, url + '/utf8/%F0%9F%90%8D'))
self.assertFalse(parser.can_fetch(agent, url + '/utf8/\U0001f40d'))
self.assertTrue(parser.can_fetch(agent, url + '/non-utf8/'))
self.assertFalse(parser.can_fetch(agent, url + '/non-utf8/%F0'))
self.assertFalse(parser.can_fetch(agent, url + '/non-utf8/\U0001f40d'))
self.assertFalse(parser.can_fetch(agent, url + '/%2F[spam]/path'))
class PasswordProtectedSiteTestCase(BaseLocalNetworkTestCase, unittest.TestCase):
class RobotHandler(BaseHTTPRequestHandler):
def do_GET(self):
self.send_error(403, "Forbidden access")
def log_message(self, format, *args):
pass
@threading_helper.reap_threads
def testPasswordProtectedSite(self):
addr = self.server.server_address
url = 'http://' + socket_helper.HOST + ':' + str(addr[1])
robots_url = url + "/robots.txt"
parser = urllib.robotparser.RobotFileParser()
parser.set_url(url)
parser.read()
self.assertFalse(parser.can_fetch("*", robots_url))
@support.requires_working_socket()
class NetworkTestCase(unittest.TestCase):
base_url = 'http://www.pythontest.net/'
robots_txt = '{}elsewhere/robots.txt'.format(base_url)
@classmethod
def setUpClass(cls):
support.requires('network')
with socket_helper.transient_internet(cls.base_url):
cls.parser = urllib.robotparser.RobotFileParser(cls.robots_txt)
cls.parser.read()
def url(self, path):
return '{}{}{}'.format(
self.base_url, path, '/' if not os.path.splitext(path)[1] else ''
)
def test_basic(self):
self.assertFalse(self.parser.disallow_all)
self.assertFalse(self.parser.allow_all)
self.assertGreater(self.parser.mtime(), 0)
self.assertFalse(self.parser.crawl_delay('*'))
self.assertFalse(self.parser.request_rate('*'))
def test_can_fetch(self):
self.assertTrue(self.parser.can_fetch('*', self.url('elsewhere')))
self.assertFalse(self.parser.can_fetch('Nutch', self.base_url))
self.assertTrue(self.parser.can_fetch('Nutch', self.url('brian')))
self.assertFalse(self.parser.can_fetch('Nutch', self.url('webstats')))
self.assertFalse(self.parser.can_fetch('*', self.url('webstats')))
self.assertTrue(self.parser.can_fetch('*', self.base_url))
def test_read_404(self):
parser = urllib.robotparser.RobotFileParser(self.url('i-robot.txt'))
parser.read()
self.assertTrue(parser.allow_all)
self.assertFalse(parser.disallow_all)
self.assertEqual(parser.mtime(), 0)
self.assertIsNone(parser.crawl_delay('*'))
self.assertIsNone(parser.request_rate('*'))
if __name__=='__main__':
unittest.main()