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@@ -0,0 +1,192 @@
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+from __future__ import unicode_literals
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+
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+from django.test import TestCase
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+
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+from dcim.models import Site
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+
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+
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+class NaturalOrderByManagerTest(TestCase):
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+ """
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+ Ensure consistent natural ordering given myriad sample data. We use dcim.Site as our guinea pig because it's simple.
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+ """
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+
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+ def setUp(self):
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+ return
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+
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+ def evaluate_ordering(self, names):
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+
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+ # Create the Sites
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+ Site.objects.bulk_create(
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+ Site(name=name, slug=name.lower()) for name in names
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+ )
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+
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+ # Validate forward ordering
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+ self.assertEqual(
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+ names,
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+ list(Site.objects.values_list('name', flat=True))
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+ )
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+
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+ # Validate reverse ordering
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+ self.assertEqual(
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+ list(reversed(names)),
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+ list(Site.objects.reverse().values_list('name', flat=True))
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+ )
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+
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+ def test_leading_digits(self):
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+
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+ self.evaluate_ordering([
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+ '1Alpha',
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+ '1Bravo',
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+ '1Charlie',
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+ '9Alpha',
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+ '9Bravo',
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+ '9Charlie',
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+ '10Alpha',
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+ '10Bravo',
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+ '10Charlie',
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+ '99Alpha',
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+ '99Bravo',
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+ '99Charlie',
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+ '100Alpha',
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+ '100Bravo',
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+ '100Charlie',
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+ '999Alpha',
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+ '999Bravo',
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+ '999Charlie',
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+ ])
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+
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+ def test_trailing_digits(self):
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+
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+ self.evaluate_ordering([
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+ 'Alpha1',
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+ 'Alpha9',
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+ 'Alpha10',
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+ 'Alpha99',
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+ 'Alpha100',
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+ 'Alpha999',
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+ 'Bravo1',
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+ 'Bravo9',
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+ 'Bravo10',
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+ 'Bravo99',
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+ 'Bravo100',
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+ 'Bravo999',
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+ 'Charlie1',
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+ 'Charlie9',
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+ 'Charlie10',
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+ 'Charlie99',
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+ 'Charlie100',
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+ 'Charlie999',
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+ ])
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+
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+ def test_leading_and_trailing_digits(self):
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+
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+ self.evaluate_ordering([
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+ '1Alpha1',
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+ '1Alpha9',
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+ '1Alpha10',
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+ '1Alpha99',
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+ '1Alpha100',
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+ '1Alpha999',
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+ '1Bravo1',
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+ '1Bravo9',
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+ '1Bravo10',
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+ '1Bravo99',
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+ '1Bravo100',
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+ '1Bravo999',
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+ '1Charlie1',
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+ '1Charlie9',
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+ '1Charlie10',
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+ '1Charlie99',
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+ '1Charlie100',
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+ '1Charlie999',
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+ '9Alpha1',
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+ '9Alpha9',
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+ '9Alpha10',
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+ '9Alpha99',
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+ '9Alpha100',
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+ '9Alpha999',
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+ '9Bravo1',
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+ '9Bravo9',
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+ '9Bravo10',
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+ '9Bravo99',
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+ '9Bravo100',
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+ '9Bravo999',
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+ '9Charlie1',
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+ '9Charlie9',
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+ '9Charlie10',
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+ '9Charlie99',
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+ '9Charlie100',
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+ '9Charlie999',
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+ '10Alpha1',
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+ '10Alpha9',
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+ '10Alpha10',
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+ '10Alpha99',
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+ '10Alpha100',
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+ '10Alpha999',
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+ '10Bravo1',
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+ '10Bravo9',
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+ '10Bravo10',
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+ '10Bravo99',
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+ '10Bravo100',
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+ '10Bravo999',
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+ '10Charlie1',
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+ '10Charlie9',
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+ '10Charlie10',
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+ '10Charlie99',
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+ '10Charlie100',
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+ '10Charlie999',
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+ '99Alpha1',
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+ '99Alpha9',
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+ '99Alpha10',
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+ '99Alpha99',
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+ '99Alpha100',
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+ '99Alpha999',
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+ '99Bravo1',
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+ '99Bravo9',
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+ '99Bravo10',
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+ '99Bravo99',
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+ '99Bravo100',
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+ '99Bravo999',
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+ '99Charlie1',
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+ '99Charlie9',
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+ '99Charlie10',
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+ '99Charlie99',
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+ '99Charlie100',
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+ '99Charlie999',
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+ '100Alpha1',
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+ '100Alpha9',
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+ '100Alpha10',
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+ '100Alpha99',
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+ '100Alpha100',
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+ '100Alpha999',
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+ '100Bravo1',
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+ '100Bravo9',
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+ '100Bravo10',
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+ '100Bravo99',
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+ '100Bravo100',
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+ '100Bravo999',
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+ '100Charlie1',
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+ '100Charlie9',
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+ '100Charlie10',
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+ '100Charlie99',
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+ '100Charlie100',
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+ '100Charlie999',
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+ '999Alpha1',
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+ '999Alpha9',
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+ '999Alpha10',
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+ '999Alpha99',
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+ '999Alpha100',
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+ '999Alpha999',
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+ '999Bravo1',
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+ '999Bravo9',
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+ '999Bravo10',
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+ '999Bravo99',
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+ '999Bravo100',
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+ '999Bravo999',
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+ '999Charlie1',
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+ '999Charlie9',
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+ '999Charlie10',
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+ '999Charlie99',
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+ '999Charlie100',
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+ '999Charlie999',
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+ ])
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Jeremy Stretch