Fix the parsing of IRC messages, especially with trailing spaces

tests/end_to_end/scenarios/multiple_channels_join.py

@@ -14,5 +14,9 @@ scenario = (
     expect_self_join_presence(jid='{jid_one}/{resource_one}', chan="#foo", nick="{nick_one}"),
     expect_self_join_presence(jid='{jid_one}/{resource_one}', chan="#bar", nick="{nick_one}"),
     expect_self_join_presence(jid='{jid_one}/{resource_one}', chan="#baz", nick="{nick_one}"),
+
+    send_stanza("<message from='{jid_one}/{resource_one}' to='#foo%{irc_server_one}' type='groupchat'><subject>Le topic</subject></message>"),
+    expect_stanza("/message"),
+
 )
 

tests/irc.cpp

@@ -0,0 +1,43 @@
+#include "catch.hpp"
+
+#include <irc/irc_message.hpp>
+
+TEST_CASE("Basic IRC message parsing")
+{
+  IrcMessage m(":prefix COMMAND un deux trois");
+  CHECK(m.prefix == "prefix");
+  CHECK(m.command == "COMMAND");
+  CHECK(m.arguments.size() == 3);
+  CHECK(m.arguments[0] == "un");
+  CHECK(m.arguments[1] == "deux");
+  CHECK(m.arguments[2] == "trois");
+}
+
+TEST_CASE("Trailing space")
+{
+  IrcMessage m(":prefix COMMAND un deux trois ");
+  CHECK(m.prefix == "prefix");
+  CHECK(m.arguments.size() == 3);
+  CHECK(m.arguments[0] == "un");
+  CHECK(m.arguments[1] == "deux");
+  CHECK(m.arguments[2] == "trois");
+}
+
+TEST_CASE("Message with :")
+{
+  IrcMessage m(":prefix COMMAND un :coucou les amis ");
+  CHECK(m.prefix == "prefix");
+  CHECK(m.arguments.size() == 2);
+  CHECK(m.arguments[0] == "un");
+  CHECK(m.arguments[1] == "coucou les amis ");
+}
+
+TEST_CASE("Message with empty :")
+{
+  IrcMessage m("COMMAND un deux :");
+  CHECK(m.prefix == "");
+  CHECK(m.arguments.size() == 3);
+  CHECK(m.arguments[0] == "un");
+  CHECK(m.arguments[1] == "deux");
+  CHECK(m.arguments[2] == "");
+}