test(backend): update auth and employee service tests

- tests/test_auth_service.py: update auth service tests
- tests/test_employee_service.py: update employee service tests

server/tests/test_auth_service.py

@@ -56,15 +56,28 @@ def test_admin_can_login_with_database_password() -> None:
         assert result.user.roleCodes == ["manager"]
 
 
-def test_disabled_employee_cannot_login() -> None:
-    with build_session() as db:
-        service = EmployeeService(db)
-        employee = service.list_employees()[0]
-        service.disable_employee(employee.id)
+def test_disabled_employee_cannot_login() -> None:
+    with build_session() as db:
+        service = EmployeeService(db)
+        employee = service.list_employees()[0]
+        service.disable_employee(employee.id)
 
         try:
             AuthService(db).login(LoginRequest(username=employee.email, password="123456"))
-        except ValueError as exc:
-            assert "账号或密码错误" in str(exc)
-        else:
-            raise AssertionError("disabled employee login should be rejected")
+        except ValueError as exc:
+            assert "账号或密码错误" in str(exc)
+        else:
+            raise AssertionError("disabled employee login should be rejected")
+
+
+def test_reenabled_employee_can_login_again() -> None:
+    with build_session() as db:
+        service = EmployeeService(db)
+        employee = service.list_employees()[0]
+        service.disable_employee(employee.id)
+        service.enable_employee(employee.id)
+
+        result = AuthService(db).login(LoginRequest(username=employee.email, password="123456"))
+
+        assert result.ok is True
+        assert result.user.username == employee.email