mirror of
https://github.com/django/django.git
synced 2024-11-18 15:34:16 +00:00
40 lines
1.6 KiB
Python
40 lines
1.6 KiB
Python
|
import datetime
|
||
|
|
from unittest import mock
|
||
|
|
|
||
|
|
from django.db.models.sql.compiler import cursor_iter
|
||
|
|
from django.test import TestCase
|
||
|
|
|
||
|
|
from .models import Article
|
||
|
|
|
||
|
|
|
||
|
|
class QuerySetIteratorTests(TestCase):
|
||
|
|
itersize_index_in_mock_args = 3
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def setUpTestData(cls):
|
||
|
|
Article.objects.create(name='Article 1', created=datetime.datetime.now())
|
||
|
|
Article.objects.create(name='Article 2', created=datetime.datetime.now())
|
||
|
|
|
||
|
|
def test_iterator_invalid_chunk_size(self):
|
||
|
|
for size in (0, -1):
|
||
|
|
with self.subTest(size=size):
|
||
|
|
with self.assertRaisesMessage(ValueError, 'Chunk size must be strictly positive.'):
|
||
|
|
Article.objects.iterator(chunk_size=size)
|
||
|
|
|
||
|
|
def test_default_iterator_chunk_size(self):
|
||
|
|
qs = Article.objects.iterator()
|
||
|
|
with mock.patch('django.db.models.sql.compiler.cursor_iter', side_effect=cursor_iter) as cursor_iter_mock:
|
||
|
|
next(qs)
|
||
|
|
self.assertEqual(cursor_iter_mock.call_count, 1)
|
||
|
|
mock_args, _mock_kwargs = cursor_iter_mock.call_args
|
||
|
|
self.assertEqual(mock_args[self.itersize_index_in_mock_args], 2000)
|
||
|
|
|
||
|
|
def test_iterator_chunk_size(self):
|
||
|
|
batch_size = 3
|
||
|
|
qs = Article.objects.iterator(chunk_size=batch_size)
|
||
|
|
with mock.patch('django.db.models.sql.compiler.cursor_iter', side_effect=cursor_iter) as cursor_iter_mock:
|
||
|
|
next(qs)
|
||
|
|
self.assertEqual(cursor_iter_mock.call_count, 1)
|
||
|
|
mock_args, _mock_kwargs = cursor_iter_mock.call_args
|
||
|
|
self.assertEqual(mock_args[self.itersize_index_in_mock_args], batch_size)
|