Initial import of ORISYS arm workstation

station/test/test_parent_exit.py

@@ -0,0 +1,27 @@
+import os
+import subprocess
+import sys
+import tempfile
+import time
+from pathlib import Path
+from unittest import TestCase
+
+
+class ParentExitTest(TestCase):
+    def test_backend_shuts_down_when_ui_owner_exits(self):
+        with tempfile.TemporaryDirectory() as directory:
+            path=Path(directory)/'service.sock'
+            source='''import os,subprocess,sys,time
+p=subprocess.Popen([sys.executable,'-m','station.control_service','--socket',sys.argv[1],'--offline','--parent-pid',str(os.getpid())],stdout=subprocess.DEVNULL,stderr=subprocess.DEVNULL)
+print(p.pid,flush=True)
+end=time.monotonic()+8
+while not os.path.exists(sys.argv[1]) and p.poll() is None and time.monotonic()<end:time.sleep(.02)
+assert os.path.exists(sys.argv[1])
+'''
+            parent=subprocess.run([sys.executable,'-c',source,str(path)],capture_output=True,text=True,timeout=12)
+            self.assertEqual(parent.returncode,0,parent.stderr)
+            end=time.monotonic()+8
+            while path.exists() and time.monotonic()<end: time.sleep(.1)
+            if path.exists():
+                os.kill(int(parent.stdout.strip()),15)
+                self.fail('orphan backend did not stop')