test: Test mainloop functions

tests/helper.py

@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+"""Helper functions for all tests."""
+__author__ = "Sven Sager"
+__copyright__ = "Copyright (C) 2024 Sven Sager"
+__license__ = "GPLv2"
+
+import os
+from signal import SIGINT
+from threading import Thread
+from time import sleep
+
+
+class ChangeThread(Thread):
+    """Thread to change IO values in background."""
+
+    def __init__(self, revpi, ioname, iovalue, time):
+        """Init ChangeThread-class."""
+        super().__init__()
+        self.revpi = revpi
+        self.ioname = ioname
+        self.time = time
+        self.iovalue = iovalue
+
+    def run(self):
+        """Thread starten."""
+        sleep(self.time)
+        self.revpi.io[self.ioname].value = self.iovalue
+
+
+class ExitThread(Thread):
+    """Call .exit() of ModIO after given time."""
+
+    def __init__(self, revpi, time):
+        """"""
+        super().__init__()
+        self.revpi = revpi
+        self.time = time
+
+    def run(self):
+        sleep(self.time)
+        self.revpi.exit()