feat: add three-surface RPA locator standards and examples

examples/real_desktop_rpa/tests/test_selector_contract.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / "scripts"))
+
+from service.desktop_session import (  # noqa: E402
+    DesktopRpaError,
+    WindowCandidate,
+    resolve_unique_window,
+)
+from util.selectors import MAIN_WINDOW  # noqa: E402
+
+
+class SelectorContractTest(unittest.TestCase):
+    def test_unique_window_is_required(self) -> None:
+        candidate = WindowCandidate(1, 10, "WXWork", "WeWorkWindow", "企业微信", True)
+        self.assertEqual(
+            resolve_unique_window(MAIN_WINDOW, candidates=[candidate]),
+            candidate,
+        )
+
+    def test_duplicate_windows_fail_instead_of_taking_first(self) -> None:
+        candidates = [
+            WindowCandidate(1, 10, "WXWork", "WeWorkWindow", "企业微信", True),
+            WindowCandidate(2, 11, "WXWork", "WeWorkWindow", "企业微信", True),
+        ]
+        with self.assertRaises(DesktopRpaError) as ctx:
+            resolve_unique_window(MAIN_WINDOW, candidates=candidates)
+        self.assertEqual(ctx.exception.code, "ELEMENT_AMBIGUOUS")
+
+    def test_hidden_window_is_not_a_candidate(self) -> None:
+        hidden = WindowCandidate(1, 10, "WXWork", "WeWorkWindow", "企业微信", False)
+        with self.assertRaises(DesktopRpaError) as ctx:
+            resolve_unique_window(MAIN_WINDOW, candidates=[hidden])
+        self.assertEqual(ctx.exception.code, "WINDOW_NOT_FOUND")
+
+
+if __name__ == "__main__":
+    unittest.main()