cleanup seed profile on failure

src/tests/test_profile_cleanup.py

@@ -0,0 +1,49 @@
+import sys
+import importlib
+import json
+from pathlib import Path
+from tempfile import TemporaryDirectory
+import pytest
+from unittest.mock import patch
+
+sys.path.append(str(Path(__file__).resolve().parents[1]))
+
+
+def setup_pm(tmp_path):
+    import constants
+    import password_manager.manager as manager_module
+
+    importlib.reload(constants)
+    importlib.reload(manager_module)
+
+    pm = manager_module.PasswordManager.__new__(manager_module.PasswordManager)
+    pm.encryption_mode = manager_module.EncryptionMode.SEED_ONLY
+    pm.fingerprint_manager = manager_module.FingerprintManager(constants.APP_DIR)
+    pm.current_fingerprint = None
+    return pm, constants, manager_module
+
+
+def test_generate_seed_cleanup_on_failure(monkeypatch):
+    with TemporaryDirectory() as tmpdir:
+        tmp_path = Path(tmpdir)
+        monkeypatch.setattr(Path, "home", lambda: tmp_path)
+
+        pm, const, mgr = setup_pm(tmp_path)
+
+        with patch("password_manager.manager.confirm_action", return_value=True):
+            monkeypatch.setattr(
+                pm,
+                "save_and_encrypt_seed",
+                lambda seed, d: (_ for _ in ()).throw(RuntimeError("fail")),
+            )
+            with pytest.raises(RuntimeError):
+                pm.generate_new_seed()
+
+        # fingerprint list should be empty and only fingerprints.json should remain
+        assert pm.fingerprint_manager.list_fingerprints() == []
+        contents = list(const.APP_DIR.iterdir())
+        assert len(contents) == 1 and contents[0].name == "fingerprints.json"
+        fp_file = pm.fingerprint_manager.fingerprints_file
+        with open(fp_file) as f:
+            data = json.load(f)
+        assert data.get("fingerprints") == []