Split all the e2e tests in their own files

Some duplication is avoided, but most importantly: it’s much much cleaner,
easier to find, functions have been cleaned up (functools.partial usages are
now hidden), etc.

tests/end_to_end/scenarios/multiline_message.py

@@ -0,0 +1,62 @@
+from scenarios import *
+
+import scenarios.simple_channel_join
+
+scenario = (
+    scenarios.simple_channel_join.scenario,
+
+    # Send a multi-line channel message
+    send_stanza("<message id='the-message-id' from='{jid_one}/{resource_one}' to='#foo%{irc_server_one}' type='groupchat'><body>un\ndeux\ntrois</body></message>"),
+    # Receive multiple messages, in order
+    expect_stanza("/message[@from='#foo%{irc_server_one}/{nick_one}'][@id='the-message-id'][@to='{jid_one}/{resource_one}'][@type='groupchat']/body[text()='un']"),
+    expect_stanza("/message[@from='#foo%{irc_server_one}/{nick_one}'][@id][@to='{jid_one}/{resource_one}'][@type='groupchat']/body[text()='deux']"),
+    expect_stanza("/message[@from='#foo%{irc_server_one}/{nick_one}'][@id][@to='{jid_one}/{resource_one}'][@type='groupchat']/body[text()='trois']"),
+
+    # Send a simple message, with no id
+    send_stanza("<message from='{jid_one}/{resource_one}' to='#foo%{irc_server_one}' type='groupchat'><body>hello</body></message>"),
+
+    # Expect a non-empty id as a result (should be a uuid)
+    expect_stanza("!/message[@id='']",
+                  "/message[@id]/body[text()='hello']"),
+
+    # even though we reflect the message to XMPP only
+    # when we send it to IRC, there’s still a race
+    # condition if the XMPP client receives the
+    # reflection (and the IRC server didn’t yet receive
+    # it), then the new user joins the room, and then
+    # finally the IRC server sends the message to “all
+    # participants of the channel”, including the new
+    # one, that was not supposed to be there when the
+    # message was sent in the first place by the first
+    # XMPP user. There’s nothing we can do about it until
+    # all servers support the echo-message IRCv3
+    # extension… So, we just sleep a little bit before
+    # joining the room with the new user.
+    sleep_for(0.2),
+    # Second user joins
+    send_stanza("<presence from='{jid_two}/{resource_one}' to='#foo%{irc_server_one}/{nick_two}' />"),
+    sequences.connection("irc.localhost", '{jid_two}/{resource_one}'),
+    # Our presence, sent to the other user
+    expect_unordered(
+        ["/presence[@to='{jid_one}/{resource_one}'][@from='#foo%{irc_server_one}/{nick_two}']/muc_user:x/muc_user:item[@affiliation='none'][@jid='{lower_nick_two}%{irc_server_one}/~{nick_two}@localhost'][@role='participant']"],
+        ["/presence[@to='{jid_two}/{resource_one}'][@from='#foo%{irc_server_one}/{nick_one}']/muc_user:x/muc_user:item[@affiliation='admin'][@role='moderator']"],
+        [
+            "/presence[@to='{jid_two}/{resource_one}'][@from='#foo%{irc_server_one}/{nick_two}']/muc_user:x/muc_user:item[@affiliation='none'][@jid='{lower_nick_two}%{irc_server_one}/~{nick_two}@localhost'][@role='participant']",
+            "/presence/muc_user:x/muc_user:status[@code='110']"
+        ],
+        ["/message[@from='#foo%{irc_server_one}'][@type='groupchat']/subject[not(text())]"]
+    ),
+
+    # Send a multi-line channel message
+    send_stanza("<message id='the-message-id' from='{jid_one}/{resource_one}' to='#foo%{irc_server_one}' type='groupchat'><body>a\nb\nc</body></message>"),
+    # Receive multiple messages, for each user
+    expect_unordered(
+        ["/message[@from='#foo%{irc_server_one}/{nick_one}'][@id='the-message-id'][@to='{jid_one}/{resource_one}'][@type='groupchat']/body[text()='a']"],
+        ["/message[@from='#foo%{irc_server_one}/{nick_one}'][@id][@to='{jid_one}/{resource_one}'][@type='groupchat']/body[text()='b']"],
+        ["/message[@from='#foo%{irc_server_one}/{nick_one}'][@id][@to='{jid_one}/{resource_one}'][@type='groupchat']/body[text()='c']"],
+
+        ["/message[@from='#foo%{irc_server_one}/{nick_one}'][@id][@to='{jid_two}/{resource_one}'][@type='groupchat']/body[text()='a']"],
+        ["/message[@from='#foo%{irc_server_one}/{nick_one}'][@id][@to='{jid_two}/{resource_one}'][@type='groupchat']/body[text()='b']"],
+        ["/message[@from='#foo%{irc_server_one}/{nick_one}'][@id][@to='{jid_two}/{resource_one}'][@type='groupchat']/body[text()='c']"],
+    )
+)