Shorten Escape key delay in OCI dialog menus

oci/tests/test_dialog_escape.py

@@ -0,0 +1,34 @@
+"""Escape delay is scoped to dialog and preserves terminal-specific overrides."""
+import os
+from pathlib import Path
+import subprocess
+import sys
+import unittest
+from unittest.mock import patch
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1] / 'src'))
+from proxmenux_oci.ui import DialogUI, UserCancelled
+
+
+class DialogEscapeTests(unittest.TestCase):
+    def test_escape_uses_short_delay_without_changing_parent_environment(self):
+        with patch.dict(os.environ, {'TERM': 'xterm'}, clear=True), \
+                patch('proxmenux_oci.ui.subprocess.run', return_value=subprocess.CompletedProcess([], 255, stderr='')) as run:
+            self.assertIsNone(DialogUI().choose('Menu', [('1', 'First')]))
+            self.assertEqual(run.call_args.kwargs['env']['ESCDELAY'], '150')
+            self.assertNotIn('ESCDELAY', os.environ)
+
+    def test_explicit_delay_is_preserved(self):
+        with patch.dict(os.environ, {'ESCDELAY': '900'}), \
+                patch('proxmenux_oci.ui.subprocess.run', return_value=subprocess.CompletedProcess([], 0, stderr='1')) as run:
+            self.assertEqual(DialogUI().choose('Menu', [('1', 'First')]), '1')
+            self.assertEqual(run.call_args.kwargs['env']['ESCDELAY'], '900')
+
+    def test_escape_in_search_input_keeps_cancellation_behavior(self):
+        with patch('proxmenux_oci.ui.subprocess.run', return_value=subprocess.CompletedProcess([], 255, stderr='')):
+            with self.assertRaises(UserCancelled):
+                DialogUI().ask('Search')
+
+
+if __name__ == '__main__':
+    unittest.main()