#!/usr/bin/python2.5

#

# Copyright 2009 the Melange authors.

#

# 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.

__authors__ = [

  '"Sverre Rabbelier" <sverre@rabbelier.nl>',

  ]

import unittest

from google.appengine.api import memcache

from soc.cache import base

class CacheDecoratorTest(unittest.TestCase):

  """Tests that the @cache decorator caches the result.

  """

  def setUp(self):

    self.called = 0

    decorator = base.getCacher(self.get, self.put)

    @decorator

    def failOnSecondCall():

      self.called = self.called + 1

      if self.called > 1:

        self.fail("method got called twice")

    self.failOnSecondCall = failOnSecondCall

  def tearDown(self):

    memcache.flush_all()

  def get(self):

    return memcache.get('answer_to_life'), 'answer_to_life'

  def put(self, answer, memcache_key):

    memcache.add(memcache_key, 42)

  def testMemcache(self):

    """Sanity check to see if memcache is working.

    """

    memcache.add('answer_to_life', 42)

    self.assertEqual(memcache.get('answer_to_life'), 42)

  def testSidebarCaching(self):

    """Test that the caching decorator caches.

    """

    self.failOnSecondCall()

    self.failOnSecondCall()