Add test for friendly decryption message?

src/tests/test_invalid_password_message.py

@@ -0,0 +1,23 @@
+from pathlib import Path
+from tempfile import TemporaryDirectory
+
+import pytest
+
+from seedpass.core.manager import PasswordManager
+from seedpass.core.config_manager import ConfigManager
+from seedpass.core.errors import SeedPassError
+from helpers import create_vault, TEST_SEED, TEST_PASSWORD
+
+
+def test_invalid_password_shows_friendly_message_once(capsys):
+    with TemporaryDirectory() as tmpdir:
+        tmp_path = Path(tmpdir)
+        vault, _ = create_vault(tmp_path, TEST_SEED, TEST_PASSWORD)
+        pm = PasswordManager.__new__(PasswordManager)
+        pm.config_manager = ConfigManager(vault, tmp_path)
+        pm.fingerprint_dir = tmp_path
+        pm.parent_seed = ""
+        with pytest.raises(SeedPassError):
+            pm.load_parent_seed(tmp_path, password="wrongpass")
+        captured = capsys.readouterr().out
+        assert captured.count("Incorrect password or corrupt file") == 1