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/irc_tls_connection.py

@@ -0,0 +1,26 @@
+from scenarios import *
+
+scenario = (
+    sequences.handshake(),
+    # First, use an adhoc command to configure how we connect to the irc server, configure
+    # only one TLS port, and disable the cert verification.
+    send_stanza("<iq type='set' id='id1' from='{jid_one}/{resource_one}' to='{irc_server_one}'><command xmlns='http://jabber.org/protocol/commands' node='configure' action='execute' /></iq>"),
+    expect_stanza("/iq[@type='result']",
+                  after = save_value("sessionid", extract_attribute("/iq[@type='result']/commands:command[@node='configure']", "sessionid"))),
+    send_stanza("<iq type='set' id='id2' from='{jid_one}/{resource_one}' to='{irc_server_one}'>"
+                "<command xmlns='http://jabber.org/protocol/commands' node='configure' sessionid='{sessionid}' action='next'>"
+                "<x xmlns='jabber:x:data' type='submit'>"
+                "<field var='ports' />"
+                "<field var='tls_ports'><value>7778</value></field>"
+                "<field var='verify_cert'><value>0</value></field>"
+                "<field var='nick'><value>my_special_nickname</value></field>"
+                "</x></command></iq>"),
+    expect_stanza("/iq[@type='result']/commands:command[@node='configure'][@status='completed']/commands:note[@type='info'][text()='Configuration successfully applied.']"),
+
+    send_stanza("<presence from='{jid_one}/{resource_one}' to='#foo%{irc_server_one}/{nick_one}' />"),
+    sequences.connection_tls("irc.localhost", '{jid_one}/{resource_one}'),
+    expect_stanza("/message/body[text()='Mode #foo [+nt] by {irc_host_one}']"),
+    expect_stanza("/presence[@to='{jid_one}/{resource_one}'][@from='#foo%{irc_server_one}/my_special_nickname']/muc_user:x/muc_user:item[@affiliation='admin'][@role='moderator']",
+                  "/presence/muc_user:x/muc_user:status[@code='110']"),
+    expect_stanza("/message[@from='#foo%{irc_server_one}'][@type='groupchat']/subject[not(text())]"),
+)