added hooks and plugins files missing

tests/test_event_dispatcher.py

@@ -0,0 +1,22 @@
+import pytest
+from app.hooks import EventDispatcher, listen_event
+
+def test_register_and_dispatch():
+    results = []
+    def listener1(a, b=None):
+        results.append(('l1', a, b))
+    def listener2(a, b=None):
+        results.append(('l2', a, b))
+    EventDispatcher.register('test_event', listener1)
+    EventDispatcher.register('test_event', listener2)
+    EventDispatcher.dispatch('test_event', 1, b=2)
+    assert ('l1', 1, 2) in results
+    assert ('l2', 1, 2) in results
+
+def test_listen_event_decorator():
+    results = []
+    @listen_event('decorated_event')
+    def handler(x):
+        results.append(x)
+    EventDispatcher.dispatch('decorated_event', 'hello')
+    assert results == ['hello']