98ee3a5377
Add history table for course access rule changes. Provide test utility for simulating restricted access. Provide `redirect_if_blocked` method for integration with other parts of the system (will be used for blocking enrollment). Add info-level logging explaining when and why users are blocked.
83 lines
2.7 KiB
Python
83 lines
2.7 KiB
Python
"""Utilities for writing unit tests that involve course embargos. """
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import contextlib
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import mock
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import pygeoip
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from django.core.urlresolvers import reverse
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from django.core.cache import cache
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from embargo.models import Country, CountryAccessRule, RestrictedCourse
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@contextlib.contextmanager
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def restrict_course(course_key, access_point="enrollment"):
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"""Simulate that a course is restricted.
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This does two things:
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1) Configures country access rules so that the course is restricted.
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2) Mocks the GeoIP call so the user appears to be coming
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from a country that's blocked from the course.
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This is useful for tests that need to verify
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that restricted users won't be able to access
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particular views.
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Arguments:
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course_key (CourseKey): The location of the course to block.
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Keyword Arguments:
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access_point (str): Either "courseware" or "enrollment"
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Yields:
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str: A URL to the page in the embargo app that explains
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why the user was blocked.
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Example Usage:
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>>> with restrict_course(course_key) as redirect_url:
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>>> # The client will appear to be coming from
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>>> # an IP address that is blocked.
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>>> resp = self.client.get(url)
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>>> self.assertRedirects(resp, redirect_url)
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"""
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# Clear the cache to ensure that previous tests don't interfere
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# with this test.
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cache.clear()
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with mock.patch.object(pygeoip.GeoIP, 'country_code_by_addr') as mock_ip:
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# Remove all existing rules for the course
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CountryAccessRule.objects.all().delete()
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# Create the country object
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# Ordinarily, we'd create models for every country,
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# but that would slow down the test suite.
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country, __ = Country.objects.get_or_create(country='IR')
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# Create a model for the restricted course
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restricted_course, __ = RestrictedCourse.objects.get_or_create(course_key=course_key)
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restricted_course.enroll_msg_key = 'default'
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restricted_course.access_msg_key = 'default'
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restricted_course.save()
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# Ensure that there is a blacklist rule for the country
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CountryAccessRule.objects.get_or_create(
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restricted_course=restricted_course,
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country=country,
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rule_type='blacklist'
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)
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# Simulate that the user is coming from the blacklisted country
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mock_ip.return_value = 'IR'
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# Yield the redirect url so the tests don't need to know
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# the embargo messaging URL structure.
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redirect_url = reverse(
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'embargo_blocked_message',
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kwargs={
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'access_point': access_point,
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'message_key': 'default'
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}
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)
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yield redirect_url
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