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d818e0c9b2
This is the result of Christopher Medrela's 2013 Summer of Code project. Thanks also to Preston Holmes, Tim Graham, Anssi Kääriäinen, Florian Apolloner, and Alex Gaynor for review notes along the way. Also: Fixes #8579, fixes #3055, fixes #19844.
82 lines
2.8 KiB
Python
82 lines
2.8 KiB
Python
from django.apps import apps
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from django.core import management
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from django.db.models import signals
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from django.test import TestCase
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from django.test.utils import override_system_checks
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from django.utils import six
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APP_CONFIG = apps.get_app_config('migrate_signals')
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PRE_MIGRATE_ARGS = ['app_config', 'verbosity', 'interactive', 'using']
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MIGRATE_DATABASE = 'default'
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MIGRATE_VERBOSITY = 1
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MIGRATE_INTERACTIVE = False
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class PreMigrateReceiver(object):
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def __init__(self):
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self.call_counter = 0
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self.call_args = None
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def __call__(self, signal, sender, **kwargs):
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self.call_counter = self.call_counter + 1
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self.call_args = kwargs
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class OneTimeReceiver(object):
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"""
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Special receiver for handle the fact that test runner calls migrate for
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several databases and several times for some of them.
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"""
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def __init__(self):
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self.call_counter = 0
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self.call_args = None
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def __call__(self, signal, sender, **kwargs):
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# Although test runner calls migrate for several databases,
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# testing for only one of them is quite sufficient.
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if kwargs['using'] == MIGRATE_DATABASE:
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self.call_counter = self.call_counter + 1
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self.call_args = kwargs
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# we need to test only one call of migrate
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signals.pre_migrate.disconnect(pre_migrate_receiver, sender=APP_CONFIG)
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# We connect receiver here and not in unit test code because we need to
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# connect receiver before test runner creates database. That is, sequence of
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# actions would be:
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#
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# 1. Test runner imports this module.
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# 2. We connect receiver.
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# 3. Test runner calls migrate for create default database.
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# 4. Test runner execute our unit test code.
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pre_migrate_receiver = OneTimeReceiver()
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signals.pre_migrate.connect(pre_migrate_receiver, sender=APP_CONFIG)
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class MigrateSignalTests(TestCase):
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available_apps = ['migrate_signals']
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def test_pre_migrate_call_time(self):
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self.assertEqual(pre_migrate_receiver.call_counter, 1)
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# `auth` app is imported, but not installed in this test, so we need to
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# exclude checks registered by this app.
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@override_system_checks([])
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def test_pre_migrate_args(self):
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r = PreMigrateReceiver()
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signals.pre_migrate.connect(r, sender=APP_CONFIG)
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management.call_command('migrate', database=MIGRATE_DATABASE,
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verbosity=MIGRATE_VERBOSITY, interactive=MIGRATE_INTERACTIVE,
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load_initial_data=False, stdout=six.StringIO())
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args = r.call_args
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self.assertEqual(r.call_counter, 1)
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self.assertEqual(set(args), set(PRE_MIGRATE_ARGS))
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self.assertEqual(args['app_config'], APP_CONFIG)
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self.assertEqual(args['verbosity'], MIGRATE_VERBOSITY)
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self.assertEqual(args['interactive'], MIGRATE_INTERACTIVE)
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self.assertEqual(args['using'], 'default')
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