"""
Copyright 2020 The Magma Authors.

This source code is licensed under the BSD-style license found in the
LICENSE file in the root directory of this source tree.

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
import unittest

from tr069.models import DeviceIdStruct
from spyne import ComplexModelBase


class DeviceIdStructTests(unittest.TestCase):
    def test_as_dict_memory_leak(self):
        """
        Test to ensure as_dict() doesn't leak model instances
        """
        thing = DeviceIdStruct(
            Manufacturer='abc',
            OUI='def',
            ProductClass='ghi',
            SerialNumber='jkl',
        )
        res = thing.as_dict()
        self.assertEqual(
            {
                'Manufacturer': 'abc',
                'OUI': 'def',
                'ProductClass': 'ghi',
                'SerialNumber': 'jkl',
            },
            res,
        )
        # inspect the spyne.util.memoize object that wraps the staticmethod
        self.assertEqual(1, len(ComplexModelBase.get_flat_type_info.memo))

        # should produce a different result and not grow the size of memo
        thing.OUI = 'aaaa'
        res = thing.as_dict()
        self.assertEqual(
            {
                'Manufacturer': 'abc',
                'OUI': 'aaaa',
                'ProductClass': 'ghi',
                'SerialNumber': 'jkl',
            },
            res,
        )
        self.assertEqual(1, len(ComplexModelBase.get_flat_type_info.memo))

        # use a different object this time. Again should not grow memo
        thing = DeviceIdStruct(
            Manufacturer='abc',
            OUI='def',
            ProductClass='ghi',
            SerialNumber='jkl',
        )
        res = thing.as_dict()
        self.assertEqual(
            {
                'Manufacturer': 'abc',
                'OUI': 'def',
                'ProductClass': 'ghi',
                'SerialNumber': 'jkl',
            },
            res,
        )
        self.assertEqual(1, len(ComplexModelBase.get_flat_type_info.memo))