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__init__.py
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__init__.py
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from datetime import timedelta
from django.core.exceptions import ValidationError
from django.test import TransactionTestCase
from django.utils import timezone
from chamber.exceptions import PersistenceException
from chamber.models import DynamicChangedFields, Comparator, Unknown
from germanium.tools import assert_equal, assert_false, assert_raises, assert_true # pylint: disable=E0401
from test_chamber.models import ComparableModel, DiffModel, RelatedSmartModel, TestSmartModel # pylint: disable=E0401
from .dispatchers import * # NOQA
from .fields import * # NOQA
from .humanized_helpers import * # NOQA
class NameComparator(Comparator):
def compare(self, a, b):
return a.name == b.name
class TestProxySmartModel(TestSmartModel):
def clean_name(self):
if len(self.name) >= 10:
raise ValidationError('name must be lower than 10')
class Meta:
proxy = True
class TestPreProxySmartModel(TestSmartModel):
def __init__(self, **kwargs):
self.name = None
super(TestPreProxySmartModel, self).__init__(**kwargs)
def _pre_save(self, *args, **kwargs):
self.name = 'test pre save'
def _pre_delete(self, *args, **kwargs):
self.name = 'test pre delete'
class Meta:
proxy = True
class TestPostProxySmartModel(TestSmartModel):
def __init__(self, **kwargs):
self.name = None
super(TestPostProxySmartModel, self).__init__(**kwargs)
def _post_save(self, *args, **kwargs):
self.name = 'test post save'
def _post_delete(self, *args, **kwargs):
self.name = 'test post delete'
class Meta:
proxy = True
class ModelsTestCase(TransactionTestCase):
def test_smart_model_initial_values_should_be_unknown_for_not_saved_instance(self):
obj = DiffModel(name='test', datetime=timezone.now(), number=2)
assert_true(obj.has_changed)
assert_true(obj.changed_fields)
assert_equal(set(obj.changed_fields.keys()), {'created_at', 'changed_at', 'id', 'datetime', 'name', 'number'})
assert_true(obj.is_adding)
assert_false(obj.is_changing)
assert_true(all(v is Unknown for v in obj.initial_values.values()))
assert_true(all(not bool(v) for v in obj.initial_values.values()))
obj.save()
assert_false(obj.has_changed)
assert_false(obj.changed_fields)
assert_false(obj.is_adding)
assert_true(obj.is_changing)
assert_true(all(v is not Unknown for v in obj.initial_values.values()))
obj = DiffModel.objects.get(pk=obj.pk)
assert_false(obj.has_changed)
assert_false(obj.changed_fields)
assert_false(obj.is_adding)
assert_true(obj.is_changing)
assert_true(all(v is not Unknown for v in obj.initial_values.values()))
def test_smart_model_changed_fields(self):
obj = TestProxySmartModel.objects.create(name='a')
changed_fields = DynamicChangedFields(obj)
assert_equal(len(changed_fields), 0)
obj.name = 'b'
assert_equal(len(changed_fields), 1)
assert_equal(changed_fields['name'].initial, 'a')
assert_equal(changed_fields['name'].current, 'b')
static_changed_fields = changed_fields.get_static_changes()
obj.save()
# Initial values is not changed
assert_equal(len(changed_fields), 2)
assert_equal(len(static_changed_fields), 1)
assert_equal(set(changed_fields.keys()), {'name', 'changed_at'})
assert_equal(set(static_changed_fields.keys()), {'name'})
assert_equal(changed_fields['name'].initial, 'a')
assert_equal(changed_fields['name'].current, 'b')
assert_true(changed_fields.has_any_key('name', 'crated_at'))
assert_false(changed_fields.has_any_key('invalid', 'crated_at'))
assert_raises(AttributeError, changed_fields.__delitem__, 'name')
assert_raises(AttributeError, changed_fields.clear)
assert_raises(AttributeError, changed_fields.pop, 'name')
obj.name = 'b'
def test_model_diff(self):
obj = DiffModel.objects.create(name='test', datetime=timezone.now(), number=2)
assert_false(obj.has_changed)
obj.name = 'test2'
assert_true(obj.has_changed)
assert_equal(set(obj.changed_fields.keys()), {'name'})
assert_equal((obj.changed_fields['name'].initial, obj.changed_fields['name'].current), ('test', 'test2'))
obj.name = 'test'
assert_false(obj.has_changed)
assert_false(obj.changed_fields)
obj.name = 'test2'
obj.number = 3
obj.datetime = obj.datetime + timedelta(days=2)
assert_true(obj.has_changed)
assert_equal(set(obj.changed_fields.keys()), {'name', 'number', 'datetime'})
obj.save()
assert_false(obj.has_changed)
assert_false(obj.changed_fields)
def test_comparator(self):
obj1 = ComparableModel.objects.create(name='test')
obj2 = ComparableModel.objects.create(name='test')
obj3 = ComparableModel.objects.create(name='test2')
comparator = NameComparator()
assert_true(obj1.equals(obj2, comparator))
assert_true(obj2.equals(obj1, comparator))
assert_false(obj1.equals(obj3, comparator))
assert_false(obj3.equals(obj1, comparator))
def test_should_raise_exception_due_calling_default_comparator(self):
obj1 = ComparableModel.objects.create(name='test')
obj2 = ComparableModel.objects.create(name='test')
assert_raises(NotImplementedError, obj1.equals, obj2, Comparator())
def test_smart_model_clean_pre_save(self):
assert_raises(PersistenceException, TestProxySmartModel.objects.create, name=10 * 'a')
obj = TestProxySmartModel.objects.create(name=9 * 'a')
obj.name = 11 * 'a'
assert_raises(PersistenceException, obj.save)
assert_equal(len(TestProxySmartModel.objects.get(pk=obj.pk).name), 9)
obj.save(is_cleaned_pre_save=False)
assert_equal(len(TestProxySmartModel.objects.get(pk=obj.pk).name), 11)
def test_smart_model_clean_post_save(self):
class PostSaveTestProxySmartModel(TestProxySmartModel):
class Meta:
proxy = True
verbose_name = 'testmodel'
verbose_name_plural = 'testmodels'
class SmartMeta:
is_cleaned_pre_save = False
is_cleaned_post_save = True
assert_false(PostSaveTestProxySmartModel.objects.filter(name=10 * 'a').exists())
assert_raises(PersistenceException, PostSaveTestProxySmartModel.objects.create, name=10 * 'a')
assert_true(PostSaveTestProxySmartModel.objects.filter(name=10 * 'a').exists())
obj = PostSaveTestProxySmartModel.objects.create(name=9 * 'a')
obj.name = 11 * 'a'
assert_raises(PersistenceException, obj.save)
assert_equal(len(PostSaveTestProxySmartModel.objects.get(pk=obj.pk).name), 11)
obj.name = 12 * 'a'
obj.save(is_cleaned_post_save=False)
assert_equal(len(PostSaveTestProxySmartModel.objects.get(pk=obj.pk).name), 12)
def test_smart_model_clean_atomic_post_save(self):
class AtomicPostSaveTestProxySmartModel(TestProxySmartModel):
class Meta:
proxy = True
verbose_name = 'testmodel'
verbose_name_plural = 'testmodels'
class SmartMeta:
is_cleaned_pre_save = False
is_cleaned_post_save = True
is_save_atomic = True
assert_false(AtomicPostSaveTestProxySmartModel.objects.filter(name=10 * 'a').exists())
assert_raises(PersistenceException, AtomicPostSaveTestProxySmartModel.objects.create, name=10 * 'a')
assert_false(AtomicPostSaveTestProxySmartModel.objects.filter(name=10 * 'a').exists())
obj = AtomicPostSaveTestProxySmartModel.objects.create(name=9 * 'a')
obj.name = 11 * 'a'
assert_raises(PersistenceException, obj.save)
assert_equal(len(AtomicPostSaveTestProxySmartModel.objects.get(pk=obj.pk).name), 9)
obj.name = 12 * 'a'
obj.save(is_cleaned_post_save=False)
assert_equal(len(AtomicPostSaveTestProxySmartModel.objects.get(pk=obj.pk).name), 12)
def test_smart_model_clean_pre_delete(self):
class PreDeleteTestProxySmartModel(TestProxySmartModel):
class Meta:
proxy = True
verbose_name = 'testmodel'
verbose_name_plural = 'testmodels'
class SmartMeta:
is_cleaned_pre_save = False
is_cleaned_pre_delete = True
obj = PreDeleteTestProxySmartModel.objects.create(name=10 * 'a')
obj_pk = obj.pk
assert_raises(PersistenceException, obj.delete)
assert_true(PreDeleteTestProxySmartModel.objects.filter(pk=obj_pk).exists())
obj = PreDeleteTestProxySmartModel.objects.create(name=10 * 'a')
obj_pk = obj.pk
obj.delete(is_cleaned_pre_delete=False)
assert_false(PreDeleteTestProxySmartModel.objects.filter(pk=obj_pk).exists())
def test_smart_model_clean_post_delete(self):
class PostDeleteTestProxySmartModel(TestProxySmartModel):
class Meta:
proxy = True
verbose_name = 'testmodel'
verbose_name_plural = 'testmodels'
class SmartMeta:
is_cleaned_pre_save = False
is_cleaned_post_delete = True
obj = PostDeleteTestProxySmartModel.objects.create(name=10 * 'a')
obj_pk = obj.pk
assert_raises(PersistenceException, obj.delete)
assert_false(PostDeleteTestProxySmartModel.objects.filter(pk=obj_pk).exists())
obj = PostDeleteTestProxySmartModel.objects.create(name=10 * 'a')
obj_pk = obj.pk
obj.delete(is_cleaned_post_delete=False)
assert_false(PostDeleteTestProxySmartModel.objects.filter(pk=obj_pk).exists())
def test_smart_model_clean_atomic_post_delete(self):
class AtomicPostDeleteTestProxySmartModel(TestProxySmartModel):
class Meta:
proxy = True
verbose_name = 'testmodel'
verbose_name_plural = 'testmodels'
class SmartMeta:
is_cleaned_pre_save = False
is_cleaned_post_delete = True
is_delete_atomic = True
obj = AtomicPostDeleteTestProxySmartModel.objects.create(name=10 * 'a')
obj_pk = obj.pk
assert_raises(PersistenceException, obj.delete)
assert_true(AtomicPostDeleteTestProxySmartModel.objects.filter(pk=obj_pk).exists())
obj = AtomicPostDeleteTestProxySmartModel.objects.create(name=10 * 'a')
obj_pk = obj.pk
obj.delete(is_cleaned_post_delete=False)
assert_false(AtomicPostDeleteTestProxySmartModel.objects.filter(pk=obj_pk).exists())
def test_smart_model_pre_save(self):
obj = TestPreProxySmartModel.objects.create()
assert_equal(obj.name, 'test pre save')
obj.name = 10 * 'a'
obj.save()
assert_equal(obj.name, 'test pre save')
assert_true(TestPreProxySmartModel.objects.filter(name='test pre save').exists())
def test_smart_model_pre_delete(self):
obj = TestPreProxySmartModel.objects.create()
assert_equal(obj.name, 'test pre save')
obj.delete()
assert_equal(obj.name, 'test pre delete')
def test_smart_model_post_save(self):
assert_raises(PersistenceException, TestPostProxySmartModel.objects.create)
obj = TestPostProxySmartModel.objects.create(name=10 * 'a')
assert_equal(obj.name, 'test post save')
assert_false(TestPreProxySmartModel.objects.filter(name='test post save').exists())
assert_true(TestPreProxySmartModel.objects.filter(name=10 * 'a').exists())
obj.save()
assert_true(TestPreProxySmartModel.objects.filter(name='test post save').exists())
obj.name = 10 * 'a'
obj.save()
assert_equal(obj.name, 'test post save')
assert_false(TestPreProxySmartModel.objects.filter(name='test post save').exists())
def test_smart_model_post_delete(self):
obj = TestPostProxySmartModel.objects.create(name=10 * 'a')
assert_equal(obj.name, 'test post save')
obj.delete()
assert_equal(obj.name, 'test post delete')
def test_smart_queryset_fast_distinct(self):
t = TestSmartModel.objects.create(name='name')
RelatedSmartModel.objects.create(test_smart_model=t)
RelatedSmartModel.objects.create(test_smart_model=t)
qs = TestSmartModel.objects.filter(test_smart_models__test_smart_model=t)
assert_equal(qs.count(), 2)
assert_equal(tuple(qs.values_list('pk', flat=True)), (t.pk, t.pk))
assert_equal(qs.fast_distinct().count(), 1)
def test_smart_model_first_and_last_with_order(self):
test3 = TestSmartModel.objects.create(name='3')
test2 = TestSmartModel.objects.create(name='2')
test1 = TestSmartModel.objects.create(name='1')
assert_equal(TestSmartModel.objects.first('id'), test3)
assert_equal(TestSmartModel.objects.last('id'), test1)
assert_equal(TestSmartModel.objects.first('name'), test1)
assert_equal(TestSmartModel.objects.last('name'), test3)
assert_equal(TestSmartModel.objects.filter(name='2').first(), test2)
assert_equal(TestSmartModel.objects.filter(name='2').last(), test2)
def test_smart_model_str_method(self):
obj = TestSmartModel.objects.create(name='1')
assert_equal(str(obj), 'test smart model #{}'.format(obj.pk))
unstored_obj = TestSmartModel(name='1')
assert_equal(str(unstored_obj), 'test smart model #None')