improved the test a bit.

and de-mystefied the `messsage_received` signal thing.

singlesiding/singleinstance.py

@@ -63,7 +63,8 @@ class QSingleApplication(QtWidgets.QApplication):
         converted into a :func:`UUID <uuid.uuid5>` before being utilized. If
         you *really* wish to use your own string, set ``_app_id``.
     """
-    message_received = QtCore.Signal(dict)
+    # This can't be anything but a list of strings anyway.
+    message_received = QtCore.Signal(list)
 
     composition_changed = QtCore.Signal()
 

test/app_test_app.py

@@ -1,4 +1,5 @@
 import os
+import json
 try:
     import singlesiding
 except ModuleNotFoundError:
@@ -10,12 +11,12 @@
 
 
 def main():
-    app = singlesiding.initialize('test', 'test app', '1', 'message!')
+    app = singlesiding.initialize('test', 'test app', '1')
     return app
 
 
 def _on_msg_receive(msg):
-    print('MSG on %s: "%s"' % (os.getpid(), msg))
+    print('MSG on %s: >%s< type: %s' % (os.getpid(), msg, type(msg)))
 
 
 if __name__ == '__main__':

test/test.py

@@ -36,13 +36,13 @@ def test_app(self):
         print('p1.pid: %s' % p1.pid)
         # process 1 is onening
 
-        p2 = subprocess.Popen([sys.executable, TEST_APP_PATH])
+        p2 = subprocess.Popen([sys.executable, TEST_APP_PATH, 'Test123'])
         print('p2.pid: %s' % p2.pid)
         p2.wait(5)
         self.assertFalse(_is_running(p2.pid), 'Process 2 is STILL running!')
         # process 2 killed itself
 
-        p3 = subprocess.Popen([sys.executable, TEST_APP_PATH, 'random argument'])
+        p3 = subprocess.Popen([sys.executable, TEST_APP_PATH, 'random argument', '123'])
         print('p3.pid: %s' % p3.pid)
         p3.wait(5)
         self.assertFalse(_is_running(p3.pid), 'Process 3 is STILL running!')