class TestImmutableDict(TestCase):
def setUp(self) -> None:
self.initial_dict = {
't': 10,
'a': [{
'b': 1,
'c': 2
}],
'd': {
'e': {
'f': True
}
}
}
self.immutable_dict = ImmutableCaseInsensitiveDict(self.initial_dict)
def test_assignment_not_allowed(self) -> None:
with self.assertRaises(TypeError):
# pylint: disable=E1137
self.immutable_dict['a'] = 1 # type: ignore
def test_nested_assignment_not_allowed(self) -> None:
with self.assertRaises(TypeError):
# pylint: disable=E1137
self.immutable_dict['d']['e']['f'] = False
def test_original_dict_not_mutated(self) -> None:
_ = self.immutable_dict['a']
self.assertEqual(self.initial_dict, self.immutable_dict._container)
def test_raises_error_for_non_existent_key(self) -> None:
with self.assertRaises(KeyError):
_ = self.immutable_dict['a-non-existent-key']
def test_getitem(self) -> None:
self.assertEqual(self.immutable_dict['t'], self.initial_dict['t'])
def test_nested_access(self) -> None:
self.assertEqual(self.immutable_dict['a'][0]['b'], 1)
self.assertEqual(self.immutable_dict['d']['e']['f'], True)
def test_equality(self) -> None:
# Equality with dict
self.assertEqual(self.immutable_dict, self.initial_dict)
# Equality with another instance
equal_dict = deepcopy(self.initial_dict)
other_immutable_dict = ImmutableCaseInsensitiveDict(equal_dict)
self.assertEqual(other_immutable_dict, self.immutable_dict)
def test_shallow_copy(self) -> None:
self.assertEqual(self.immutable_dict._container, self.initial_dict)
self.assertIsNot(self.immutable_dict._container, self.initial_dict)
def test_get(self) -> None:
self.assertIsInstance(self.immutable_dict.get('d'),
ImmutableCaseInsensitiveDict)
self.assertIsInstance(self.immutable_dict.get('a'), ImmutableList)
def test_ensure_immutable(self) -> None:
initial_dict = {
'a': [[1, 2], [3, 4]],
'b': {
'c': {
'd': 1
}
},
't': 10,
'e': {
'f': [{
'g': 90
}]
}
}
immutable_dict = ImmutableCaseInsensitiveDict(initial_dict)
# List of lists with immutable elements
self.assertIsInstance(immutable_dict['a'], ImmutableList)
self.assertIsInstance(immutable_dict['a'][0], ImmutableList)
self.assertEqual(immutable_dict['a'][0][1], 2)
# Two-level nested dictionary
self.assertIsInstance(immutable_dict['b'],
ImmutableCaseInsensitiveDict)
self.assertIsInstance(immutable_dict['b']['c'],
ImmutableCaseInsensitiveDict)
self.assertEqual(immutable_dict['b']['c']['d'], 1)
# Plain immutable object at top-level
self.assertIsInstance(immutable_dict['t'], int)
self.assertEqual(immutable_dict['t'], 10)
# Two-level dictionary with nested list as value
self.assertIsInstance(immutable_dict['e']['f'], ImmutableList)
self.assertIsInstance(immutable_dict['e']['f'][0],
ImmutableCaseInsensitiveDict)
self.assertEqual(immutable_dict['e']['f'][0]['g'], 90)
def test_copy(self) -> None:
initial_dict = {
'a': True,
'b': {
'c': {
'e': True,
'd': [{
'g': False
}]
}
}
}
immutable_dict = ImmutableCaseInsensitiveDict(initial_dict)
dict_copy = immutable_dict.copy()
self.assertIsNot(dict_copy, initial_dict)
self.assertIsNot(dict_copy['b'], initial_dict['b'])
self.assertEqual(dict_copy['b'], initial_dict['b'])
self.assertIsInstance(dict_copy['b'], dict)
self.assertIsInstance(dict_copy['b']['c'], dict)
self.assertIsInstance(dict_copy['b']['c']['d'], list)
self.assertIsNot(dict_copy['b']['c']['d'],
initial_dict['b']['c']['d']) # type: ignore
dict_copy['h'] = False
self.assertIs(dict_copy['h'], False)
class TestCaseInsensitiveLookup(TestCase):
def setUp(self) -> None:
self.data = {
'Content-Encoding': 'gzip',
'ACCEPT': '*/*',
'X-Forwarded-For': '10.0.0.1, 10.0.0.2',
'Request': {
'HTTP_version': '1.1',
'query': 'p=1&r=2'
}
}
self.case_insensitive_dict = ImmutableCaseInsensitiveDict(self.data)
def test_membership_check(self) -> None:
self.assertIn('accept', self.case_insensitive_dict)
self.assertIn('Accept', self.case_insensitive_dict)
self.assertIn('ACCEPT', self.case_insensitive_dict)
self.assertIn('CONTENT-Encoding', self.case_insensitive_dict)
self.assertIn('REQUEST', self.case_insensitive_dict)
self.assertNotIn('Content-Length', self.case_insensitive_dict)
self.assertIn('http_version', self.case_insensitive_dict['request'])
def test_immutable_return_value(self) -> None:
self.assertIsInstance(self.case_insensitive_dict['request'],
ImmutableCaseInsensitiveDict)
self.assertEqual(self.case_insensitive_dict['request'],
self.data['Request'])
self.assertEqual(self.case_insensitive_dict['request']['Query'],
'p=1&r=2')
def test_getitem(self) -> None:
self.assertEqual(self.case_insensitive_dict['accept'],
self.data['ACCEPT'])
self.assertEqual(self.case_insensitive_dict['CONTENT-ENCODING'],
self.data['Content-Encoding'])
self.assertEqual(self.case_insensitive_dict['request']['http_version'],
'1.1')
with self.assertRaises(KeyError):
_ = self.case_insensitive_dict['Unknown-key']
def test_get(self) -> None:
self.assertEqual(self.case_insensitive_dict.get('x-forwarded-for'),
self.data['X-Forwarded-For'])
self.assertEqual(self.case_insensitive_dict.get('X-FORWARDED-FOR'),
self.data['X-Forwarded-For'])
self.assertIsNone(self.case_insensitive_dict.get('Unknown-key'))
self.assertEqual(self.case_insensitive_dict.get('Unknown-key', 1), 1)
def test_original_keys_on_iteration(self) -> None:
self.assertListEqual(list(self.data), list(self.case_insensitive_dict))
self.assertListEqual(list(self.data.keys()),
list(self.case_insensitive_dict.keys()))
self.assertListEqual(list(self.data.items()),
list(self.case_insensitive_dict.items()))
def test_on_conflict_first_occurrence_returned(self) -> None:
data = {
'X-Forwarded-For': '10.0.0.1, 10.0.0.2',
'X-FORWARDED-FOR': '10.0.0.3, 10.0.0.4'
}
case_insensitive_dict = ImmutableCaseInsensitiveDict(data)
self.assertEqual(case_insensitive_dict['X-FORWARDED-FOR'],
'10.0.0.3, 10.0.0.4')
self.assertEqual(case_insensitive_dict['x-forwarded-for'],
data['X-Forwarded-For'])
def test_on_empty_container_raises_key_error(self) -> None:
case_insensitive_dict = ImmutableCaseInsensitiveDict({})
with self.assertRaisesRegex(KeyError, 'non_existing_key'):
_ = case_insensitive_dict['non_existing_key']
def test_incremental_map_build(self) -> None:
# Normally protected attributes should not participate in testing,
# however this is critical functionality, so we maximize the test coverage.
self.assertIn('CONTENT-ENCODING', self.case_insensitive_dict)
self.assertEqual(self.case_insensitive_dict._case_insensitive_keymap,
{'content-encoding': 'Content-Encoding'})
self.assertIn('X-FORWARDED-FOR', self.case_insensitive_dict)
self.assertEqual(
self.case_insensitive_dict._case_insensitive_keymap, {
'content-encoding': 'Content-Encoding',
'accept': 'ACCEPT',
'x-forwarded-for': 'X-Forwarded-For'
})
# Ensure existing keys in the key map are returned
self.assertIn('CONTENT-ENCODING', self.case_insensitive_dict)
self.assertIn('REQUEST', self.case_insensitive_dict)
self.assertEqual(
self.case_insensitive_dict._case_insensitive_keymap, {
'content-encoding': 'Content-Encoding',
'accept': 'ACCEPT',
'x-forwarded-for': 'X-Forwarded-For',
'request': 'Request'
})
# Ensure after the keymap is fully built keys are successfully matched
self.assertIn('X-FORWARDED-FOR', self.case_insensitive_dict)
self.assertTrue(self.case_insensitive_dict._keymap_fully_built)