mirror of https://github.com/django/django.git
86 lines
2.5 KiB
Python
86 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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from unittest import TestCase
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from django.template import Context, Variable, VariableDoesNotExist
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from django.template.context import RenderContext
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class ContextTests(TestCase):
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def test_context(self):
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c = Context({"a": 1, "b": "xyzzy"})
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self.assertEqual(c["a"], 1)
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self.assertEqual(c.push(), {})
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c["a"] = 2
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self.assertEqual(c["a"], 2)
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self.assertEqual(c.get("a"), 2)
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self.assertEqual(c.pop(), {"a": 2})
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self.assertEqual(c["a"], 1)
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self.assertEqual(c.get("foo", 42), 42)
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with c.push():
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c['a'] = 2
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self.assertEqual(c['a'], 2)
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self.assertEqual(c['a'], 1)
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with c.push(a=3):
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self.assertEqual(c['a'], 3)
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self.assertEqual(c['a'], 1)
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def test_resolve_on_context_method(self):
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# Regression test for #17778
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empty_context = Context()
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self.assertRaises(VariableDoesNotExist,
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Variable('no_such_variable').resolve, empty_context)
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self.assertRaises(VariableDoesNotExist,
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Variable('new').resolve, empty_context)
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self.assertEqual(Variable('new').resolve(Context({'new': 'foo'})), 'foo')
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def test_render_context(self):
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test_context = RenderContext({'fruit': 'papaya'})
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# Test that push() limits access to the topmost dict
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test_context.push()
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test_context['vegetable'] = 'artichoke'
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self.assertEqual(list(test_context), ['vegetable'])
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self.assertNotIn('fruit', test_context)
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with self.assertRaises(KeyError):
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test_context['fruit']
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self.assertIsNone(test_context.get('fruit'))
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def test_flatten_context(self):
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a = Context()
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a.update({'a': 2})
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a.update({'b': 4})
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a.update({'c': 8})
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self.assertEqual(a.flatten(), {
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'False': False, 'None': None, 'True': True,
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'a': 2, 'b': 4, 'c': 8
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})
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def test_context_comparable(self):
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test_data = {'x': 'y', 'v': 'z', 'd': {'o': object, 'a': 'b'}}
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self.assertEqual(Context(test_data), Context(test_data))
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# Regression test for #21765
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a = Context()
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b = Context()
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self.assertEqual(a, b)
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# update only a
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a.update({'a': 1})
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self.assertNotEqual(a, b)
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# update both to check regression
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a.update({'c': 3})
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b.update({'c': 3})
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self.assertNotEqual(a, b)
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# make contexts equals again
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b.update({'a': 1})
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self.assertEqual(a, b)
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