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from functools import partial
import collections
import datetime
import asyncio
import time
import lxml.etree
import io
common_replacements = {
'irc_server_one': 'irc.localhost@biboumi.localhost',
'irc_server_two': 'localhost@biboumi.localhost',
'irc_host_one': 'irc.localhost',
'irc_host_two': 'localhost',
'biboumi_host': 'biboumi.localhost',
'resource_one': 'resource1',
'resource_two': 'resource2',
'nick_one': 'Nick',
'jid_one': 'first@example.com',
'jid_two': 'second@example.com',
'jid_admin': 'admin@example.com',
'nick_two': 'Bobby',
'nick_three': 'Bernard',
'lower_nick_one': 'nick',
'lower_nick_two': 'bobby',
}
class SkipStepError(Exception):
"""
Raised by a step when it needs to be skiped, by running
the next available step immediately.
"""
pass
class StanzaError(Exception):
"""
Raised when a step fails.
"""
pass
def match(stanza, xpath):
tree = lxml.etree.parse(io.StringIO(str(stanza)))
matched = tree.xpath(xpath, namespaces={'re': 'http://exslt.org/regular-expressions',
'muc_user': 'http://jabber.org/protocol/muc#user',
'muc_owner': 'http://jabber.org/protocol/muc#owner',
'muc': 'http://jabber.org/protocol/muc',
'disco_info': 'http://jabber.org/protocol/disco#info',
'muc_traffic': 'http://jabber.org/protocol/muc#traffic',
'disco_items': 'http://jabber.org/protocol/disco#items',
'commands': 'http://jabber.org/protocol/commands',
'dataform': 'jabber:x:data',
'version': 'jabber:iq:version',
'mam': 'urn:xmpp:mam:2',
'rms': 'http://jabber.org/protocol/rsm',
'delay': 'urn:xmpp:delay',
'forward': 'urn:xmpp:forward:0',
'client': 'jabber:client',
'rsm': 'http://jabber.org/protocol/rsm',
'carbon': 'urn:xmpp:carbons:2',
'hints': 'urn:xmpp:hints',
'stanza': 'urn:ietf:params:xml:ns:xmpp-stanzas',
'stable_id': 'urn:xmpp:sid:0'})
return matched
def check_xpath(xpaths, xmpp, after, stanza):
for xpath in xpaths:
expected = True
real_xpath = xpath
# We can check that a stanza DOESN’T match, by adding a ! before it.
if xpath.startswith('!'):
expected = False
xpath = xpath[1:]
matched = match(stanza, xpath)
if (expected and not matched) or (not expected and matched):
raise StanzaError("Received stanza\n%s\ndid not match expected xpath\n%s" % (stanza, real_xpath))
if after:
if isinstance(after, collections.Iterable):
for af in after:
af(stanza, xmpp)
else:
after(stanza, xmpp)
def check_xpath_optional(xpaths, xmpp, after, stanza):
try:
check_xpath(xpaths, xmpp, after, stanza)
except StanzaError:
raise SkipStepError()
def all_xpaths_match(stanza, xpaths):
try:
check_xpath(xpaths, None, None, stanza)
except StanzaError:
return False
return True
def check_list_of_xpath(list_of_xpaths, xmpp, stanza):
found = False
for i, xpaths in enumerate(list_of_xpaths):
if all_xpaths_match(stanza, xpaths):
found = True
list_of_xpaths.pop(i)
break
if not found:
raise StanzaError("Received stanza “%s” did not match any of the expected xpaths:\n%s" % (stanza, list_of_xpaths))
if list_of_xpaths:
step = partial(expect_unordered_already_formatted, list_of_xpaths)
xmpp.scenario.steps.insert(0, step)
def extract_attribute(xpath, name):
def f(xpath, name, stanza):
matched = match(stanza, xpath)
return matched[0].get(name)
return partial(f, xpath, name)
def extract_text(xpath, stanza):
matched = match(stanza, xpath)
return matched[0].text
def save_value(name, func):
def f(name, func, stanza, xmpp):
xmpp.saved_values[name] = func(stanza)
return partial(f, name, func)
def expect_stanza(*args, optional=False, after=None):
def f(*xpaths, xmpp, biboumi, optional, after):
replacements = common_replacements
replacements.update(xmpp.saved_values)
check_func = check_xpath if not optional else check_xpath_optional
xmpp.stanza_checker = partial(check_func, [xpath.format_map(replacements) for xpath in xpaths], xmpp, after)
return partial(f, *args, optional=optional, after=after)
def send_stanza(stanza):
def internal(stanza, xmpp, biboumi):
replacements = common_replacements
replacements.update(xmpp.saved_values)
xmpp.send_raw(stanza.format_map(replacements))
asyncio.get_event_loop().call_soon(xmpp.run_scenario)
return partial(internal, stanza)
def expect_unordered(*args):
def f(*lists_of_xpaths, xmpp, biboumi):
formatted_list_of_xpaths = []
for list_of_xpaths in lists_of_xpaths:
formatted_xpaths = []
for xpath in list_of_xpaths:
formatted_xpath = xpath.format_map(common_replacements)
formatted_xpaths.append(formatted_xpath)
formatted_list_of_xpaths.append(tuple(formatted_xpaths))
expect_unordered_already_formatted(formatted_list_of_xpaths, xmpp, biboumi)
return partial(f, *args)
def expect_unordered_already_formatted(formatted_list_of_xpaths, xmpp, biboumi):
xmpp.stanza_checker = partial(check_list_of_xpath, formatted_list_of_xpaths, xmpp)
def sleep_for(duration):
def f(duration, xmpp, biboumi):
time.sleep(duration)
asyncio.get_event_loop().call_soon(xmpp.run_scenario)
return partial(f, duration)
def save_current_timestamp_plus_delta(key, delta):
def f(key, delta, message, xmpp):
now_plus_delta = datetime.datetime.utcnow() + delta
xmpp.saved_values[key] = now_plus_delta.strftime("%FT%T.967Z")
return partial(f, key, delta)
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