Move the Interface god class from gajim.py into a separate module.

This is the first commit of a long serious of cleanup commits.
Simple testcase included to test the slightly enhanced Interface dispatcher.

src/interface_test.py

+'''
+Created on Oct 18, 2009
+
+@author: stephan
+'''
+import unittest
+
+import common.configpaths
+common.configpaths.gajimpaths.init(None)
+common.configpaths.gajimpaths.init_profile("tmp-test-profile")
+
+from common import logging_helpers
+logging_helpers.set_quiet()
+
+
+from interface import Interface
+
+class Test(unittest.TestCase):
+
+
+	def test_instantiation(self):
+		''' Test that we can proper initialize and do not fail on globals '''
+		interface = Interface()
+		interface.run()
+						
+	def test_dispatch(self):
+		''' Test dispatcher forwarding network events to handler_* methods '''
+		sut = Interface()
+		
+		success = sut.dispatch('No Such Event', None, None)
+		self.assertFalse(success, msg="Unexisting event handled")
+			
+		success = sut.dispatch('STANZA_ARRIVED', None, None)
+		self.assertTrue(success, msg="Existing event must be handled")
+			
+	def test_register_unregister_single_handler(self):
+		''' Register / Unregister a custom event handler '''
+		sut = Interface()
+		event = 'TESTS_ARE_COOL_EVENT'
+			
+		self.called = False
+		def handler(account, data):
+			self.assertEqual(account, 'account')
+			self.assertEqual(data, 'data')
+			self.called = True
+			
+		self.assertFalse(self.called)
+		sut.register_handler('TESTS_ARE_COOL_EVENT', handler)
+		sut.dispatch(event, 'account', 'data')
+		self.assertTrue(self.called, msg="Handler should have been called")
+
+		self.called = False
+		sut.unregister_handler('TESTS_ARE_COOL_EVENT', handler)
+		sut.dispatch(event, 'account', 'data')
+		self.assertFalse(self.called, msg="Handler should no longer be called")
+			
+		
+	def test_dispatch_to_multiple_handlers(self):
+		''' Register and dispatch a single event to multiple handlers '''
+		sut = Interface()
+		event = 'SINGLE_EVENT'
+			
+		self.called_a = False
+		self.called_b = False
+			
+		def handler_a(account, data):
+			self.assertFalse(self.called_a, msg="One must only be notified once")
+			self.called_a = True
+			
+		def handler_b(account, data):
+			self.assertFalse(self.called_b, msg="One must only be notified once")
+			self.called_b = True
+			
+		sut.register_handler(event, handler_a)
+		sut.register_handler(event, handler_b)
+		
+		# register again
+		sut.register_handler('SOME_OTHER_EVENT', handler_b)
+		sut.register_handler(event, handler_a)
+			
+		sut.dispatch(event, 'account', 'data')
+		self.assertTrue(self.called_a and self.called_b,
+			msg="Both handlers should have been called")
+		
+
+if __name__ == "__main__":
+		#import sys;sys.argv = ['', 'Test.test']
+		unittest.main()
\ No newline at end of file