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63 lines
2.5 KiB
Python
63 lines
2.5 KiB
Python
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from django.test import TestCase
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from .models import DumbCategory, NamedCategory, ProxyCategory
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class ContainsTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.category = DumbCategory.objects.create()
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cls.proxy_category = ProxyCategory.objects.create()
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def test_unsaved_obj(self):
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msg = "QuerySet.contains() cannot be used on unsaved objects."
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with self.assertRaisesMessage(ValueError, msg):
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DumbCategory.objects.contains(DumbCategory())
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def test_obj_type(self):
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msg = "'obj' must be a model instance."
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with self.assertRaisesMessage(TypeError, msg):
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DumbCategory.objects.contains(object())
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def test_values(self):
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msg = "Cannot call QuerySet.contains() after .values() or .values_list()."
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with self.assertRaisesMessage(TypeError, msg):
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DumbCategory.objects.values_list("pk").contains(self.category)
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with self.assertRaisesMessage(TypeError, msg):
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DumbCategory.objects.values("pk").contains(self.category)
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def test_basic(self):
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with self.assertNumQueries(1):
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self.assertIs(DumbCategory.objects.contains(self.category), True)
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# QuerySet.contains() doesn't evaluate a queryset.
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with self.assertNumQueries(1):
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self.assertIs(DumbCategory.objects.contains(self.category), True)
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def test_evaluated_queryset(self):
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qs = DumbCategory.objects.all()
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proxy_qs = ProxyCategory.objects.all()
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# Evaluate querysets.
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list(qs)
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list(proxy_qs)
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with self.assertNumQueries(0):
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self.assertIs(qs.contains(self.category), True)
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self.assertIs(qs.contains(self.proxy_category), True)
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self.assertIs(proxy_qs.contains(self.category), True)
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self.assertIs(proxy_qs.contains(self.proxy_category), True)
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def test_proxy_model(self):
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with self.assertNumQueries(1):
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self.assertIs(DumbCategory.objects.contains(self.proxy_category), True)
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with self.assertNumQueries(1):
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self.assertIs(ProxyCategory.objects.contains(self.category), True)
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def test_wrong_model(self):
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qs = DumbCategory.objects.all()
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named_category = NamedCategory(name="category")
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with self.assertNumQueries(0):
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self.assertIs(qs.contains(named_category), False)
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# Evaluate the queryset.
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list(qs)
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with self.assertNumQueries(0):
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self.assertIs(qs.contains(named_category), False)
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