Synnefo

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from contextlib import contextmanager

from django.test import TestCase

from django.utils import simplejson as json

from synnefo.util.text import udec

from mock import patch

@contextmanager

def override_settings(settings, **kwargs):

    """

    Helper context manager to override django settings within the provided

    context.

    All keyword arguments provided are set to the django settings object and

    get reverted/removed when the manager exits.

    >>> from synnefo.util.testing import override_settings

    >>> from django.conf import settings

    >>> with override_settings(settings, DEBUG=True):

    >>>     assert settings.DEBUG == True

    The special arguemnt ``prefix`` can be set to prefix all setting keys with

    the provided value.

    >>> from django.conf import settings

    >>> from django.core import mail

    >>> with override_settings(settings, CONTACT_EMAILS=['kpap@grnet.gr'],

    >>>                        prefix='MYAPP_'):

    >>>     from django.core.mail import send_mail

    >>>     send_mail("hello", "I love you kpap", settings.DEFAULT_FROM_EMAIL,

    >>>               settings.MYAPP_CONTACT_EMAILS)

    >>>     assert 'kpap@grnet.gr' in mail.mailbox[0].recipients()

    If you plan to reuse it

    >>> import functools

    >>> from synnefo.util.testing import override_settings

    >>> from django.conf import settings

    >>> myapp_settings = functools.partial(override_settings, prefix='MYAPP_')

    >>> with myapp_settings(CONTACT_EMAILS=['kpap@grnet.gr'])

    >>>     assert settings.MYAPP_CONTACT_EMAILS == ['kpap@grnet.gr']

    """

    _prefix = kwargs.get('prefix', '')

    prefix = lambda key: '%s%s' % (_prefix, key)

    oldkeys = [k for k in dir(settings) if k.upper() == k]

    oldsettings = dict([(k, getattr(settings, k)) for k in oldkeys])

    toremove = []

    for key, value in kwargs.iteritems():

        key = prefix(key)

        if not hasattr(settings, key):

            toremove.append(key)

        setattr(settings, key, value)

    yield

    # Remove keys that didn't exist

    for key in toremove:

        delattr(settings, key)

    # Remove keys that added during the execution of the context

    if kwargs.get('reset_changes', True):

        newkeys = [k for k in dir(settings) if k.upper() == k]

        for key in newkeys:

            if not key in oldkeys:

                delattr(settings, key)

    # Revert old keys

    for key in oldkeys:

        if key == key.upper():

            setattr(settings, key, oldsettings.get(key))

def with_settings(settings, prefix='', **override):

    def wrapper(func):

        def inner(*args, **kwargs):

            with override_settings(settings, prefix=prefix, **override):

                ret = func(*args, **kwargs)

            return ret

        return inner

    return wrapper

serial = 0

@contextmanager

def astakos_user(user):

    """

    Context manager to mock astakos response.

    usage:

    with astakos_user("user@user.com"):

        .... make api calls ....

    """

    with patch("snf_django.lib.api.get_token") as get_token:

        get_token.return_value = "DummyToken"

        with patch('astakosclient.AstakosClient.get_user_info') as m:

            m.return_value = {"uuid": udec(user, 'utf8')}

            with patch('astakosclient.AstakosClient.get_quotas') as m2:

                m2.return_value = {

                    "system": {

                        "pithos.diskspace": {

                            "usage": 0,

                            "limit": 1073741824,  # 1GB

                            "pending": 0

                        }

                    }

                }

                issue_fun = "astakosclient.AstakosClient.issue_one_commission"

                with patch(issue_fun) as m3:

                    serials = []

                    append = serials.append

                    def get_serial(*args, **kwargs):

                        global serial

                        serial += 1

                        append(serial)

                        return serial

                    m3.side_effect = get_serial

                    resolv_fun = \

                        'astakosclient.AstakosClient.resolve_commissions'

                    with patch(resolv_fun) as m4:

                        m4.return_value = {'accepted': serials,

                                           'rejected': [],

                                           'failed': []}

                        users_fun = 'astakosclient.AstakosClient.get_usernames'

                        with patch(users_fun) as m5:

                            def get_usernames(*args, **kwargs):

                                uuids = args[-1]

                                return dict((uuid, uuid) for uuid in uuids)

                            m5.side_effect = get_usernames

                            yield

@contextmanager

def mocked_quotaholder(success=True):

    with patch("synnefo.quotas.Quotaholder.get") as astakos:

        global serial

        serial += 10

        def foo(*args, **kwargs):

            return (len(astakos.return_value.issue_one_commission.mock_calls) +

                    serial)

        astakos.return_value.issue_one_commission.side_effect = foo

        astakos.return_value.resolve_commissions.return_value = {"failed": []}

        yield astakos.return_value

class BaseAPITest(TestCase):

    def get(self, url, user='user', *args, **kwargs):

        with astakos_user(user):

            with mocked_quotaholder():

                response = self.client.get(url, *args, **kwargs)

        return response

    def delete(self, url, user='user'):

        with astakos_user(user):

            with mocked_quotaholder():

                response = self.client.delete(url)

        return response

    def post(self, url, user='user', params={}, ctype='json', *args, **kwargs):

        if ctype == 'json':

            content_type = 'application/json'

        with astakos_user(user):

            with mocked_quotaholder():

                response = self.client.post(url, params,

                                            content_type=content_type,

                                            *args, **kwargs)

        return response

    def put(self, url, user='user', params={}, ctype='json', *args, **kwargs):

        if ctype == 'json':

            content_type = 'application/json'

        with astakos_user(user):

            with mocked_quotaholder():

                response = self.client.put(url, params,

                                           content_type=content_type,

                                           *args, **kwargs)

        return response

    def assertSuccess(self, response):

        self.assertTrue(response.status_code in [200, 202, 203, 204])

    def assertFault(self, response, status_code, name):

        self.assertEqual(response.status_code, status_code)

        fault = json.loads(response.content)

        self.assertEqual(fault.keys(), [name])

    def assertBadRequest(self, response):

        self.assertFault(response, 400, 'badRequest')

    def assertItemNotFound(self, response):

        self.assertFault(response, 404, 'itemNotFound')

    def assertMethodNotAllowed(self, response):

        self.assertFault(response, 400, 'badRequest')

        try:

            error = json.loads(response.content)

        except ValueError:

            self.assertTrue(False)

        self.assertEqual(error['badRequest']['message'], 'Method not allowed')

# Imitate unittest assertions new in Python 2.7

class _AssertRaisesContext(object):

    """

    A context manager used to implement TestCase.assertRaises* methods.

    Adapted from unittest2.

    """

    def __init__(self, expected):

        self.expected = expected

    def __enter__(self):

        return self

    def __exit__(self, exc_type, exc_value, tb):

        if exc_type is None:

            try:

                exc_name = self.expected.__name__

            except AttributeError:

                exc_name = str(self.expected)

            raise AssertionError(

                "%s not raised" % (exc_name,))

        if not issubclass(exc_type, self.expected):

            # let unexpected exceptions pass through

            return False

        self.exception = exc_value  # store for later retrieval

        return True

def assertRaises(excClass):

    return _AssertRaisesContext(excClass)

def assertGreater(x, y):

    assert x > y

def assertIn(x, y):

    assert x in y