test: derive keys for vault setup

src/tests/test_manager_workflow.py

@@ -1,11 +1,10 @@
 import sys
 from pathlib import Path
 from tempfile import TemporaryDirectory
-from cryptography.fernet import Fernet
+from helpers import create_vault, TEST_SEED, TEST_PASSWORD
 
 sys.path.append(str(Path(__file__).resolve().parents[1]))
 
-from password_manager.encryption import EncryptionManager
 from password_manager.entry_management import EntryManager
 from password_manager.vault import Vault
 from password_manager.backup import BackupManager
@@ -29,9 +28,7 @@ class FakeNostrClient:
 def test_manager_workflow(monkeypatch):
     with TemporaryDirectory() as tmpdir:
         tmp_path = Path(tmpdir)
-        key = Fernet.generate_key()
-        enc_mgr = EncryptionManager(key, tmp_path)
-        vault = Vault(enc_mgr, tmp_path)
+        vault, enc_mgr = create_vault(tmp_path, TEST_SEED, TEST_PASSWORD)
         entry_mgr = EntryManager(vault, tmp_path)
         backup_mgr = BackupManager(tmp_path)