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@dlespiau
Created May 3, 2016 17:08
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Testing for pending migrations in Django
# The MIT License (MIT)
#
# Copyright (c) 2016 Damien Lespiau
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import sys
from cStringIO import StringIO
from contextlib import contextmanager
from django.core import management
from django.test import TestCase
@contextmanager
def capture(command, *args, **kwargs):
out, sys.stdout = sys.stdout, StringIO()
command(*args, **kwargs)
sys.stdout.seek(0)
yield sys.stdout.read()
sys.stdout = out
def makemigrations():
management.call_command('makemigrations')
class MigrationTest(TestCase):
def testPendingMigration(self):
"""Make sure there's no pending migration."""
with capture(makemigrations) as output:
self.assertEqual(output, "No changes detected\n")
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