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62 lines
2.3 KiB
Python
62 lines
2.3 KiB
Python
from django.test import TestCase
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from .models import Person
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class RecursiveM2MTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.a, cls.b, cls.c, cls.d = [
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Person.objects.create(name=name)
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for name in ['Anne', 'Bill', 'Chuck', 'David']
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]
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cls.a.friends.add(cls.b, cls.c)
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# Add m2m for Anne and Chuck in reverse direction.
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cls.d.friends.add(cls.a, cls.c)
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def test_recursive_m2m_all(self):
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for person, friends in (
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(self.a, [self.b, self.c, self.d]),
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(self.b, [self.a]),
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(self.c, [self.a, self.d]),
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(self.d, [self.a, self.c]),
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):
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with self.subTest(person=person):
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self.assertSequenceEqual(person.friends.all(), friends)
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def test_recursive_m2m_reverse_add(self):
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# Add m2m for Anne in reverse direction.
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self.b.friends.add(self.a)
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self.assertSequenceEqual(self.a.friends.all(), [self.b, self.c, self.d])
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self.assertSequenceEqual(self.b.friends.all(), [self.a])
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def test_recursive_m2m_remove(self):
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self.b.friends.remove(self.a)
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self.assertSequenceEqual(self.a.friends.all(), [self.c, self.d])
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self.assertSequenceEqual(self.b.friends.all(), [])
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def test_recursive_m2m_clear(self):
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# Clear m2m for Anne.
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self.a.friends.clear()
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self.assertSequenceEqual(self.a.friends.all(), [])
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# Reverse m2m relationships should be removed.
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self.assertSequenceEqual(self.c.friends.all(), [self.d])
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self.assertSequenceEqual(self.d.friends.all(), [self.c])
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def test_recursive_m2m_add_via_related_name(self):
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# Add m2m with custom related name for Anne in reverse direction.
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self.d.stalkers.add(self.a)
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self.assertSequenceEqual(self.a.idols.all(), [self.d])
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self.assertSequenceEqual(self.a.stalkers.all(), [])
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def test_recursive_m2m_add_in_both_directions(self):
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# Adding the same relation twice results in a single relation.
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self.a.idols.add(self.d)
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self.d.stalkers.add(self.a)
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self.assertSequenceEqual(self.a.idols.all(), [self.d])
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def test_recursive_m2m_related_to_self(self):
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self.a.idols.add(self.a)
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self.assertSequenceEqual(self.a.idols.all(), [self.a])
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self.assertSequenceEqual(self.a.stalkers.all(), [self.a])
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