Add tests for checksum and backup handlers

src/tests/test_manager_checksum_backup.py

@@ -0,0 +1,58 @@
+import sys
+from pathlib import Path
+
+sys.path.append(str(Path(__file__).resolve().parents[1]))
+
+from password_manager.manager import PasswordManager
+
+
+class FakeBackupManager:
+    def __init__(self, calls):
+        self.calls = calls
+
+    def create_backup(self):
+        self.calls["create"] += 1
+
+    def restore_latest_backup(self):
+        self.calls["restore"] += 1
+
+
+def _make_pm():
+    pm = PasswordManager.__new__(PasswordManager)
+    return pm
+
+
+def test_handle_verify_checksum_success(monkeypatch, tmp_path, capsys):
+    pm = _make_pm()
+    chk_file = tmp_path / "chk.txt"
+    chk_file.write_text("abc")
+    monkeypatch.setattr("password_manager.manager.SCRIPT_CHECKSUM_FILE", chk_file)
+    monkeypatch.setattr("password_manager.manager.calculate_checksum", lambda _: "abc")
+    pm.handle_verify_checksum()
+    out = capsys.readouterr().out
+    assert "Checksum verification passed." in out
+
+
+def test_handle_verify_checksum_failure(monkeypatch, tmp_path, capsys):
+    pm = _make_pm()
+    chk_file = tmp_path / "chk.txt"
+    chk_file.write_text("xyz")
+    monkeypatch.setattr("password_manager.manager.SCRIPT_CHECKSUM_FILE", chk_file)
+    monkeypatch.setattr("password_manager.manager.calculate_checksum", lambda _: "abc")
+    pm.handle_verify_checksum()
+    out = capsys.readouterr().out
+    assert "Checksum verification failed" in out
+
+
+def test_backup_and_restore_database(monkeypatch, capsys):
+    pm = _make_pm()
+    calls = {"create": 0, "restore": 0}
+    pm.backup_manager = FakeBackupManager(calls)
+    pm.backup_database()
+    out1 = capsys.readouterr().out
+    pm.restore_database()
+    out2 = capsys.readouterr().out
+    assert calls["create"] == 1
+    assert calls["restore"] == 1
+    assert "Backup created successfully." in out1
+    assert "Database restored from the latest backup successfully." in out2