test for Marcs issue

mpf/tests/machine_files/shows/config/test_shows.yaml

@@ -4,6 +4,7 @@ modes:
   - mode1
   - mode2
   - mode3
+  - mode4
 
 leds:
     led_01:

mpf/tests/machine_files/shows/modes/mode4/config/mode4.yaml

@@ -0,0 +1,27 @@
+# config_version=4
+
+mode:
+  start_events: start_mode4
+
+ball_saves:
+  default:
+    active_time: 10s
+    hurry_up_time: 2s
+    grace_period: 2s
+    enable_events: mode_mode4_started
+    timer_start_events: balldevice_bd_plunger_ball_eject_success
+    auto_launch: true
+    balls_to_save: 1
+    debug: true
+
+show_player:
+  ball_save_default_enabled:
+    on:
+      key: ball_save_flash
+      show_tokens:
+        leds: led_02
+      speed: 4
+      loops: -1
+  ball_save_default_disabled:
+    ball_save_flash:
+      action: stop

mpf/tests/test_Shows.py

@@ -748,3 +748,15 @@ def test_nested_shows_stop_before_load(self):
             self.advance_time_and_run(1)
         self.assertEqual(0, self._events['test'])
         self.assertTrue(self.machine.shows['mychildshow'].loaded)
+
+    def test_show_on_mode_start(self):
+        self.assertEqual([0, 0, 0], self.machine.leds.led_02.hw_driver.current_color)
+
+        self.post_event("start_mode4")
+        self.advance_time_and_run()
+        self.assertEqual([255, 255, 255], self.machine.leds.led_02.hw_driver.current_color)
+
+        self.post_event("balldevice_bd_plunger_ball_eject_success")
+
+        self.advance_time_and_run(15)
+        self.assertEqual([0, 0, 0], self.machine.leds.led_02.hw_driver.current_color)