[core/event] Initial commit of simplistic event engine

core/event.py

@@ -0,0 +1,13 @@
+
+callbacks = {}
+
+def register(event, callback, *args, **kwargs):
+    callbacks.setdefault(event, []).append(
+        lambda: callback(*args, **kwargs)
+    )
+
+def trigger(event):
+    for callback in callbacks.get(event, []):
+        callback()
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

tests/core/test_event.py

@@ -0,0 +1,46 @@
+import unittest
+
+import core.event
+
+
+class event(unittest.TestCase):
+    def setUp(self):
+        self.someEvent = 'event'
+        self.called = {}
+        self.params = []
+
+    def callback1(self):
+        self.called['callback1'] = True
+
+    def callback2(self):
+        self.called['callback2'] = True
+
+    def callback_args(self, val1, val2):
+        self.called['callback_args'] = True
+        self.params = [val1, val2]
+
+    def callback_kwargs(self, val1, val2, key1=None, key2=None):
+        self.called['callback_kwargs'] = True
+        self.params = [val1, val2, key1, key2]
+
+    def test_simple_callback(self):
+        core.event.register(self.someEvent, self.callback1)
+        core.event.register(self.someEvent, self.callback2)
+
+        core.event.trigger(self.someEvent)
+
+        self.assertEqual(2, len(self.called.keys()))
+
+    def test_arg_callback(self):
+        core.event.register(self.someEvent, self.callback_args, 'a', 'b')
+        core.event.trigger(self.someEvent)
+        self.assertEqual(1, len(self.called.keys()))
+        self.assertEqual(['a', 'b'], self.params)
+
+    def test_kwargs_callback(self):
+        core.event.register(self.someEvent, self.callback_kwargs, 'a', 'b', key1='test', key2='x')
+        core.event.trigger(self.someEvent)
+        self.assertEqual(1, len(self.called.keys()))
+        self.assertEqual(['a', 'b', 'test', 'x'], self.params)
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4