How to use the granary.instagram function in granary

def test_update_instagram_picture_profile_404s(self):
    self.setup_instagram(batch_size=1)

    auth_entity = indieauth.IndieAuth(id='http://foo.com/', user_json='{}')
    source = Instagram.new(
        None, auth_entity=auth_entity, features=['listen'],
        actor={'username': 'x', 'image': {'url': 'http://old/pic'}})
    source.put()

    super(HandlerTest, self).expect_requests_get(
      gr_instagram.HTML_BASE_URL + 'x/', status_code=404, allow_redirects=False)
    self.mox.ReplayAll()

    resp = tasks.application.get_response('/cron/update_instagram_pictures')
    self.assertEqual(200, resp.status_int)
    self.assertEqual('http://old/pic', source.key.get().picture)

def test_instagram_scrape_with_cookie(self):
    self.expect_requests_get(
      instagram.HTML_BASE_URL, test_instagram.HTML_FEED_COMPLETE,
      allow_redirects=False, headers={'Cookie': 'sessionid=c00k1e'})
    self.mox.ReplayAll()
    resp = app.application.get_response(
      '/instagram/@me/@friends/@app/?cookie=c00k1e&interactive=true')
    self.assertEqual(200, resp.status_int, resp.body)
    self.assertEqual('application/json; charset=utf-8',
                     resp.headers['Content-Type'])
    self.assert_equals(test_instagram.HTML_ACTIVITIES_FULL,
                       json_loads(resp.body)['items'])

def expect_instagram_fetch(self, body=gr_test_instagram.HTML_PROFILE_COMPLETE,
                             **kwargs):
    return TestCase.expect_requests_get(
      self, gr_instagram.HTML_BASE_URL + 'snarfed/', body,
      allow_redirects=False, **kwargs)

def test_update_instagram_picture_profile_404s(self):
    self.setup_instagram(batch_size=1)

    auth_entity = indieauth.IndieAuth(id='http://foo.com/', user_json='{}')
    source = Instagram.new(
        None, auth_entity=auth_entity, features=['listen'],
        actor={'username': 'x', 'image': {'url': 'http://old/pic'}})
    source.put()

    super(HandlerTest, self).expect_requests_get(
      gr_instagram.HTML_BASE_URL + 'x/', status_code=404, allow_redirects=False)
    self.mox.ReplayAll()

    resp = cron.application.get_response('/cron/update_instagram_pictures')
    self.assertEqual(200, resp.status_int)
    self.assertEquals('http://old/pic', source.key.get().picture)

def expect_instagram_profile_fetch(self, username):
    profile = copy.deepcopy(test_instagram.HTML_PROFILE)
    profile['entry_data']['ProfilePage'][0]['graphql']['user'].update({
      'username': username,
      'profile_pic_url': 'http://new/pic',
    })
    super(HandlerTest, self).expect_requests_get(
      gr_instagram.HTML_BASE_URL + '%s/' % username,
      test_instagram.HTML_HEADER + json_dumps(profile) + test_instagram.HTML_FOOTER,
      allow_redirects=False)

def expect_instagram_profile_fetch(self, username):
    profile = copy.deepcopy(test_instagram.HTML_PROFILE)
    profile['entry_data']['ProfilePage'][0]['graphql']['user'].update({
      'username': username,
      'profile_pic_url': 'http://new/pic',
    })
    super(HandlerTest, self).expect_requests_get(
      gr_instagram.HTML_BASE_URL + '%s/' % username,
      test_instagram.HTML_HEADER + json_dumps(profile) + test_instagram.HTML_FOOTER,
      allow_redirects=False)

def get(self):
    cookie = 'sessionid=%s' % urllib.parse.quote(
      util.get_required_param(self, 'sessionid').encode('utf-8'))
    logging.info('Fetching with Cookie: %s', cookie)

    host_url = self.request.host_url + '/'
    ig = instagram.Instagram()
    try:
      resp = ig.get_activities_response(group_id=source.FRIENDS, scrape=True,
                                        cookie=cookie)
    except Exception as e:
      status, text = util.interpret_http_exception(e)
      if status in ('403',):
        self.response.headers['Content-Type'] = 'application/atom+xml'
        self.response.out.write(atom.activities_to_atom([{
          'object': {
            'url': self.request.url,
            'content': 'Your instagram-atom cookie isn\'t working. <a href="%s">Click here to regenerate your feed!</a>' % host_url,
            },
          }], {}, title='instagram-atom', host_url=host_url,
          request_url=self.request.path_url))
        return
      elif status == '401':

if site == 'twitter':
      src = twitter.Twitter(
        access_token_key=util.get_required_param(self, 'access_token_key'),
        access_token_secret=util.get_required_param(self, 'access_token_secret'))
    elif site == 'facebook':
      self.abort(400, 'Sorry, Facebook is no longer available in the REST API. Try the library instead!')
    elif site == 'flickr':
      src = flickr.Flickr(
        access_token_key=util.get_required_param(self, 'access_token_key'),
        access_token_secret=util.get_required_param(self, 'access_token_secret'))
    elif site == 'github':
      src = github.GitHub(
        access_token=util.get_required_param(self, 'access_token'))
    elif site == 'instagram':
      if self.request.get('interactive').lower() == 'true':
        src = instagram.Instagram(scrape=True)
      else:
        self.abort(400, 'Sorry, Instagram is not currently available in the REST API. Try https://instagram-atom.appspot.com/ instead!')
    elif site == 'mastodon':
      src = mastodon.Mastodon(
        instance=util.get_required_param(self, 'instance'),
        access_token=util.get_required_param(self, 'access_token'),
        user_id=util.get_required_param(self, 'user_id'))
    else:
      src_cls = source.sources.get(site)
      if not src_cls:
        raise exc.HTTPNotFound('Unknown site %r' % site)
      src = src_cls(**self.request.params)

    # decode tag URI ids
    for i, arg in enumerate(args):
      parsed = util.parse_tag_uri(arg)

handler: the current :class:`webapp2.RequestHandler`
      auth_entity: :class:`oauth_dropins.instagram.InstagramAuth`
    """
    user = json_loads(auth_entity.user_json)
    user['actor'] = actor
    auth_entity.user_json = json_dumps(user)
    auth_entity.put()

    username = actor['username']
    if not kwargs.get('features'):
      kwargs['features'] = ['listen']
    return Instagram(id=username,
                     auth_entity=auth_entity.key,
                     name=actor.get('displayName'),
                     picture=actor.get('image', {}).get('url'),
                     url=gr_instagram.Instagram.user_url(username),
                     **kwargs)

def get(self):
    host_url = self.request.host_url + "/"
    ig = instagram.Instagram(access_token=util.get_required_param(self, 'access_token'))
    activities = ig.get_activities(count=50)
    actor = ig.get_actor()
    title = 'instagram-atom feed for %s' % ig.actor_name(actor)

    # switchover warning
    activities.append({
      'verb': 'post',
      'published': '2016-01-19T00:00:00',
      'id': 'tag:instagram-atom.appspot.com,2016:0',
      'url': 'https://instagram-atom.appspot.com/',
      'title': 'ATTENTION: Please update your instagram-atom feed!',
      'actor': {
        'displayName': 'Ryan Barrett',
        'id': 'https://snarfed.org/',
        'url': 'https://snarfed.org/',
      },