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from copy import deepcopy
import hashlib
import json
try:
from unittest.mock import Mock, patch
except ImportError:
from mock import Mock, patch
from django.test import TestCase
from rest_framework import viewsets
from rest_framework_extensions.key_constructor.constructors import (
KeyConstructor,
)
from rest_framework_extensions.utils import get_unique_method_id
from rest_framework.test import APIRequestFactory
from tests_app.testutils import (
override_extensions_api_settings,
TestFormatKeyBit,
TestUsedKwargsKeyBit,
TestLanguageKeyBit,
)
factory = APIRequestFactory()
class KeyConstructorTest_bits(TestCase):
def test_me(self):
class MyKeyConstructor(KeyConstructor):
format = TestFormatKeyBit()
language = TestLanguageKeyBit()
constructor_instance = MyKeyConstructor()
expected = {
'format': MyKeyConstructor.format,
'language': MyKeyConstructor.language
}
self.assertEqual(constructor_instance.bits, expected)
def test_with_inheritance(self):
class MyKeyConstructor(KeyConstructor):
format = TestFormatKeyBit()
class ChildKeyConstructor(MyKeyConstructor):
language = TestLanguageKeyBit()
constructor_instance = ChildKeyConstructor()
expected = {
'format': ChildKeyConstructor.format,
'language': ChildKeyConstructor.language
}
self.assertEqual(constructor_instance.bits, expected)
class KeyConstructorTest(TestCase):
def setUp(self):
class View(viewsets.ReadOnlyModelViewSet):
pass
view_intance = View()
view_method = view_intance.retrieve
self.kwargs = {
'view_instance': view_intance,
'view_method': view_method,
'request': factory.get(''),
'args': None,
'kwargs': None
}
def test_prepare_key_consistency_for_equal_dicts_with_different_key_positions(self):
class MyKeyConstructor(KeyConstructor):
pass
constructor_instance = MyKeyConstructor()
one = {'used_kwargs': {'view_method': 'view_method', 'kwargs': None, 'view_instance': 'view_instance', 'params': {'hello': 'world'}, 'args': None, 'request': 'request'}}
two = {'used_kwargs': {'params': {'hello': 'world'}, 'kwargs': None, 'view_method': 'view_method', 'view_instance': 'view_instance', 'args': None, 'request': 'request'}}
self.assertEqual(one, two)
self.assertEqual(constructor_instance.prepare_key(one), constructor_instance.prepare_key(two))
def prepare_key(self, key_dict):
return hashlib.md5(json.dumps(key_dict, sort_keys=True).encode('utf-8')).hexdigest()
def test_key_construction__with_bits_without_params(self):
class MyKeyConstructor(KeyConstructor):
format = TestFormatKeyBit()
language = TestLanguageKeyBit()
constructor_instance = MyKeyConstructor()
response = constructor_instance(**self.kwargs)
expected = {
'format': u'json',
'language': u'ru',
}
self.assertEqual(response, self.prepare_key(expected))
def test_key_construction__with_bits_with_params(self):
class MyKeyConstructor(KeyConstructor):
used_kwargs = TestUsedKwargsKeyBit(params={'hello': 'world'})
with patch.object(json.JSONEncoder, 'default', Mock(return_value='force serializing')):
constructor_instance = MyKeyConstructor()
response = constructor_instance(**self.kwargs)
expected_value = deepcopy(self.kwargs)
expected_value['params'] = {'hello': 'world'}
expected_data_from_bits = {
'used_kwargs': expected_value
}
msg = 'Data from bits: {data_from_bits}\nExpected data from: {expected_data_from_bits}'.format(
data_from_bits=json.dumps(constructor_instance.get_data_from_bits(**self.kwargs)),
expected_data_from_bits=json.dumps(expected_data_from_bits)
)
self.assertEqual(response, self.prepare_key(expected_data_from_bits), msg=msg)
def test_two_key_construction_with_same_bits_in_different_order_should_produce_equal_keys(self):
class MyKeyConstructor_1(KeyConstructor):
language = TestLanguageKeyBit()
format = TestFormatKeyBit()
class MyKeyConstructor_2(KeyConstructor):
format = TestFormatKeyBit()
language = TestLanguageKeyBit()
self.assertEqual(
MyKeyConstructor_1()(**self.kwargs),
MyKeyConstructor_2()(**self.kwargs)
)
def test_key_construction__with_bits_with_params__and_with_constructor_with_params(self):
class MyKeyConstructor(KeyConstructor):
used_kwargs = TestUsedKwargsKeyBit(params={'hello': 'world'})
with patch.object(json.JSONEncoder, 'default', Mock(return_value='force serializing')):
constructor_instance = MyKeyConstructor(params={
'used_kwargs': {'goodbye': 'moon'}
})
response = constructor_instance(**self.kwargs)
expected_value = deepcopy(self.kwargs)
expected_value['params'] = {'goodbye': 'moon'}
expected_data_from_bits = {
'used_kwargs': expected_value
}
msg = 'Data from bits: {data_from_bits}\nExpected data from: {expected_data_from_bits}'.format(
data_from_bits=json.dumps(constructor_instance.get_data_from_bits(**self.kwargs)),
expected_data_from_bits=json.dumps(expected_data_from_bits)
)
self.assertEqual(response, self.prepare_key(expected_data_from_bits), msg=msg)
class KeyConstructorTest___get_memoization_key(TestCase):
def setUp(self):
class View(viewsets.ReadOnlyModelViewSet):
pass
self.view_intance = View()
self.view_method = self.view_intance.retrieve
self.request = factory.get('')
def test_me(self):
class MyKeyConstructor(KeyConstructor):
language = TestLanguageKeyBit()
format = TestFormatKeyBit()
constructor_instance = MyKeyConstructor()
response = constructor_instance._get_memoization_key(
view_instance=self.view_intance,
view_method=self.view_method,
args=[1, 2, 3, u'Привет мир'],
kwargs={1: 2, 3: 4, u'привет': u'мир'}
)
expected = json.dumps({
'unique_method_id': get_unique_method_id(view_instance=self.view_intance, view_method=self.view_method),
'args': [1, 2, 3, u'Привет мир'],
'kwargs': {1: 2, 3: 4, u'привет': u'мир'},
'instance_id': id(constructor_instance)
})
self.assertEqual(response, expected)
class KeyConstructorTestBehavior__memoization(TestCase):
def setUp(self):
class View(viewsets.ReadOnlyModelViewSet):
pass
class MyKeyConstructor(KeyConstructor):
format = TestFormatKeyBit()
language = TestLanguageKeyBit()
view_intance = View()
view_method = view_intance.retrieve
self.MyKeyConstructor = MyKeyConstructor
self.kwargs = {
'view_instance': view_intance,
'view_method': view_method,
'request': factory.get(''),
'args': None,
'kwargs': None
}
def test_should_not_memoize_by_default(self):
constructor_instance = self.MyKeyConstructor()
response_1 = constructor_instance(**self.kwargs)
response_2 = constructor_instance(**self.kwargs)
self.assertFalse(response_1 is response_2)
def test_should_memoize_if_asked(self):
constructor_instance = self.MyKeyConstructor(memoize_for_request=True)
response_1 = constructor_instance(**self.kwargs)
response_2 = constructor_instance(**self.kwargs)
self.assertTrue(response_1 is response_2)
def test_should_use_value_from_settings_for_default_memoize_boolean_value(self):
with override_extensions_api_settings(DEFAULT_KEY_CONSTRUCTOR_MEMOIZE_FOR_REQUEST=True):
constructor_instance = KeyConstructor()
self.assertTrue(constructor_instance.memoize_for_request)
with override_extensions_api_settings(DEFAULT_KEY_CONSTRUCTOR_MEMOIZE_FOR_REQUEST=False):
constructor_instance = KeyConstructor()
self.assertFalse(constructor_instance.memoize_for_request)
def test_should_memoize_in_request_instance(self):
constructor_instance = self.MyKeyConstructor(memoize_for_request=True)
response_1 = constructor_instance(**self.kwargs)
self.kwargs['request'] = factory.get('')
response_2 = constructor_instance(**self.kwargs)
self.assertFalse(response_1 is response_2)
def test_should_use_different_memoization_for_different_arguments(self):
constructor_instance = self.MyKeyConstructor(memoize_for_request=True)
response_1 = constructor_instance(**self.kwargs)
response_2 = constructor_instance(**self.kwargs)
self.assertTrue(response_1 is response_2)
self.kwargs['args'] = [1, 2, 3, u'привет мир']
response_3 = constructor_instance(**self.kwargs)
response_4 = constructor_instance(**self.kwargs)
self.assertTrue(response_3 is response_4)
self.assertFalse(response_1 is response_3)
self.assertFalse(response_1 is response_4)
self.assertFalse(response_2 is response_3)
self.assertFalse(response_2 is response_4)
def test_should_use_different_memoization_for_different_request_instances(self):
constructor_instance = self.MyKeyConstructor(memoize_for_request=True)
response_1 = constructor_instance(**self.kwargs)
self.kwargs['request'] = factory.get('')
response_2 = constructor_instance(**self.kwargs)
self.assertFalse(response_1 is response_2)
def test_should_use_different_memoization_for_different_constructor_instances(self):
constructor_instance_1 = self.MyKeyConstructor(memoize_for_request=True)
constructor_instance_2 = self.MyKeyConstructor(memoize_for_request=True)
response_1 = constructor_instance_1(**self.kwargs)
response_2 = constructor_instance_2(**self.kwargs)
self.assertFalse(response_1 is response_2)
def test_should_use_different_memoization_for_different_views_with_same_method(self):
class View_2(viewsets.ReadOnlyModelViewSet):
pass
constructor_instance = self.MyKeyConstructor(memoize_for_request=True)
response_1 = constructor_instance(**self.kwargs)
view_2_instance = View_2()
self.kwargs['view_instance'] = view_2_instance
self.kwargs['view_instance'] = view_2_instance.retrieve
response_2 = constructor_instance(**self.kwargs)
self.assertFalse(response_1 is response_2)
|
