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from django.test import TestCase
from django.contrib.admin.util import NestedObjects
from models import Count
class NestedObjectsTests(TestCase):
"""
Tests for ``NestedObject`` utility collection.
"""
def setUp(self):
self.n = NestedObjects()
self.objs = [Count.objects.create(num=i) for i in range(5)]
def _check(self, target):
self.assertEquals(self.n.nested(lambda obj: obj.num), target)
def _add(self, obj, parent=None):
# don't bother providing the extra args that NestedObjects ignores
self.n.add(None, None, obj, None, parent)
def test_unrelated_roots(self):
self._add(self.objs[0])
self._add(self.objs[1])
self._add(self.objs[2], self.objs[1])
self._check([0, 1, [2]])
def test_siblings(self):
self._add(self.objs[0])
self._add(self.objs[1], self.objs[0])
self._add(self.objs[2], self.objs[0])
self._check([0, [1, 2]])
def test_duplicate_instances(self):
self._add(self.objs[0])
self._add(self.objs[1])
dupe = Count.objects.get(num=1)
self._add(dupe, self.objs[0])
self._check([0, 1])
def test_non_added_parent(self):
self._add(self.objs[0], self.objs[1])
self._check([0])
def test_cyclic(self):
self._add(self.objs[0], self.objs[2])
self._add(self.objs[1], self.objs[0])
self._add(self.objs[2], self.objs[1])
self._add(self.objs[0], self.objs[2])
self._check([0, [1, [2]]])
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