OpenStack Study: test_sql_core.py

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# Licensed under the Apache License, Version 2.0 (the "License"); you may

# not use this file except in compliance with the License. You may obtain

# a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# 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.

from sqlalchemy.ext import declarative

import testtools

from keystone.common import sql

from keystone.tests import utils

ModelBase = declarative.declarative_base()

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class TestModel(ModelBase, sql.ModelDictMixin):

__tablename__ = 'testmodel'

id = sql.Column(sql.String(64), primary_key=True)

text = sql.Column(sql.String(64), nullable=False)

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class TestModelDictMixin(testtools.TestCase):

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    def test_creating_a_model_instance_from_a_dict(self):

        d = {'id': utils.new_uuid(), 'text': utils.new_uuid()}

        m = TestModel.from_dict(d)

        self.assertEqual(m.id, d['id'])

        self.assertEqual(m.text, d['text'])

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    def test_creating_a_dict_from_a_model_instance(self):

        m = TestModel(id=utils.new_uuid(), text=utils.new_uuid())

        d = m.to_dict()

        self.assertEqual(m.id, d['id'])

        self.assertEqual(m.text, d['text'])

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    def test_creating_a_model_instance_from_an_invalid_dict(self):

        d = {'id': utils.new_uuid(), 'text': utils.new_uuid(), 'extra': None}

        self.assertRaises(TypeError, TestModel.from_dict, d)

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    def test_creating_a_dict_from_a_model_instance_that_has_extra_attrs(self):

        expected = {'id': utils.new_uuid(), 'text': utils.new_uuid()}

        m = TestModel(id=expected['id'], text=expected['text'])

        m.extra = 'this should not be in the dictionary'

        self.assertEqual(m.to_dict(), expected)