Add test units to ClockTestCase

kivy/tests/test_clock.py

@@ -80,3 +80,40 @@ def test_unschedule_draw(self):
         Clock.unschedule(callback)
         Clock.tick()
         self.assertEqual(counter, 0)
+
+    def test_trigger_create(self):
+        from kivy.clock import Clock
+        trigger = Clock.create_trigger(callback, 0)
+        trigger()
+        self.assertEqual(counter, 0)
+        Clock.tick()
+        self.assertEqual(counter, 1)
+
+    def test_trigger_cancel(self):
+        from kivy.clock import Clock
+        trigger = Clock.create_trigger(callback, 5.)
+        trigger()
+        trigger.cancel()
+        Clock.tick()
+        self.assertEqual(counter, 0)
+
+    def test_trigger_interval(self):
+        from kivy.clock import Clock
+        trigger = Clock.create_trigger(callback, 0, interval=True)
+        trigger()
+        Clock.tick()
+        self.assertEqual(counter, 1)
+        Clock.tick()
+        self.assertEqual(counter, 2)
+
+    def test_trigger_decorator(self):
+        from kivy.clock import Clock, triggered
+
+        @triggered()
+        def triggered_callback():
+            callback(dt=0)
+
+        triggered_callback()
+        self.assertEqual(counter, 0)
+        Clock.tick()
+        self.assertEqual(counter, 1)