Hand written mock

Siddharta Govindaraj · Siddharta Govindaraj · commit eac4c29937b8 · 2015-03-23T14:49:32.000+05:30
diff --git a/stock_alerter/event.py b/stock_alerter/event.py
@@ -0,0 +1,12 @@
+class Event:
+    """A generic class that provides signal/slot functionality"""
+
+    def __init__(self):
+        self.listeners = []
+
+    def connect(self, listener):
+        self.listeners.append(listener)
+
+    def fire(self, *args, **kwargs):
+        for listener in self.listeners:
+            listener(*args, **kwargs)
diff --git a/stock_alerter/tests/test_event.py b/stock_alerter/tests/test_event.py
@@ -0,0 +1,16 @@
+import unittest
+
+from ..event import Event
+
+
+class EventTest(unittest.TestCase):
+    def test_a_listener_is_notified_when_an_event_is_raised(self):
+        called = False
+        def listener():
+            nonlocal called
+            called = True
+
+        event = Event()
+        event.connect(listener)
+        event.fire()
+        self.assertTrue(called)
