add regression tests

irctest/server_tests/test_regressions.py

@@ -0,0 +1,27 @@
+"""
+Regression tests for bugs in oragono.
+"""
+
+from irctest import cases
+
+class RegressionsTestCase(cases.BaseServerTestCase):
+
+    @cases.SpecificationSelector.requiredBySpecification('RFC1459')
+    def testFailedNickChange(self):
+        # see oragono commit d0ded906d4ac8f
+        self.connectClient('alice')
+        self.connectClient('bob')
+
+        # bob tries to change to an in-use nickname; this MUST fail
+        self.sendLine(2, 'NICK alice')
+        ms = self.getMessages(2)
+        self.assertEqual(len(ms), 1)
+        self.assertMessageEqual(ms[0], command='433') # ERR_NICKNAMEINUSE
+
+        # bob MUST still own the bob nick, and be able to receive PRIVMSG as bob
+        self.sendLine(1, 'PRIVMSG bob hi')
+        ms = self.getMessages(1)
+        self.assertEqual(len(ms), 0)
+        ms = self.getMessages(2)
+        self.assertEqual(len(ms), 1)
+        self.assertMessageEqual(ms[0], command='PRIVMSG', params=['bob', 'hi'])