fix client command-line argument parsing

clients/test_client_args.py

@@ -0,0 +1,40 @@
+import importlib.util
+import runpy
+import sys
+import types
+import unittest
+from pathlib import Path
+
+
+CLIENT_DIR = Path(__file__).resolve().parent
+
+
+class ClientArgumentTests(unittest.TestCase):
+    def test_password_with_user_text_does_not_replace_username(self):
+        if importlib.util.find_spec("psutil") is None:
+            sys.modules["psutil"] = types.ModuleType("psutil")
+
+        arguments = [
+            "SERVER=127.0.0.1",
+            "PORT=35601",
+            "USER=s01",
+            "PASSWORD=USER_DEFAULT_PASSWORD",
+            "INTERVAL=2",
+            "NOTUSER=ignored",
+        ]
+        expected = {
+            "SERVER": "127.0.0.1",
+            "PORT": "35601",
+            "USER": "s01",
+            "PASSWORD": "USER_DEFAULT_PASSWORD",
+            "INTERVAL": "2",
+        }
+
+        for filename in ("client-linux.py", "client-psutil.py"):
+            with self.subTest(client=filename):
+                namespace = runpy.run_path(str(CLIENT_DIR / filename))
+                self.assertEqual(namespace["parse_cli_args"](arguments), expected)
+
+
+if __name__ == "__main__":
+    unittest.main()