mirror of https://github.com/django/django.git
101 lines
3.9 KiB
Python
101 lines
3.9 KiB
Python
import shutil
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from django.core.cache import cache
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from django.core.files.base import ContentFile
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from django.core.files.uploadedfile import SimpleUploadedFile
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from django.test import TestCase
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from models import Storage, temp_storage, temp_storage_location
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class FileTests(TestCase):
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def tearDown(self):
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shutil.rmtree(temp_storage_location)
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def test_files(self):
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# Attempting to access a FileField from the class raises a descriptive
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# error
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self.assertRaises(AttributeError, lambda: Storage.normal)
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# An object without a file has limited functionality.
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obj1 = Storage()
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self.assertEqual(obj1.normal.name, "")
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self.assertRaises(ValueError, lambda: obj1.normal.size)
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# Saving a file enables full functionality.
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obj1.normal.save("django_test.txt", ContentFile("content"))
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self.assertEqual(obj1.normal.name, "tests/django_test.txt")
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self.assertEqual(obj1.normal.size, 7)
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self.assertEqual(obj1.normal.read(), "content")
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# File objects can be assigned to FileField attributes, but shouldn't
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# get committed until the model it's attached to is saved.
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obj1.normal = SimpleUploadedFile("assignment.txt", "content")
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dirs, files = temp_storage.listdir("tests")
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self.assertEqual(dirs, [])
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self.assertEqual(sorted(files), ["default.txt", "django_test.txt"])
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obj1.save()
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dirs, files = temp_storage.listdir("tests")
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self.assertEqual(
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sorted(files), ["assignment.txt", "default.txt", "django_test.txt"]
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)
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# Files can be read in a little at a time, if necessary.
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obj1.normal.open()
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self.assertEqual(obj1.normal.read(3), "con")
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self.assertEqual(obj1.normal.read(), "tent")
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self.assertEqual(list(obj1.normal.chunks(chunk_size=2)), ["co", "nt", "en", "t"])
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# Save another file with the same name.
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obj2 = Storage()
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obj2.normal.save("django_test.txt", ContentFile("more content"))
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self.assertEqual(obj2.normal.name, "tests/django_test_1.txt")
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self.assertEqual(obj2.normal.size, 12)
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# Push the objects into the cache to make sure they pickle properly
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cache.set("obj1", obj1)
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cache.set("obj2", obj2)
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self.assertEqual(cache.get("obj2").normal.name, "tests/django_test_1.txt")
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# Deleting an object deletes the file it uses, if there are no other
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# objects still using that file.
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obj2.delete()
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obj2.normal.save("django_test.txt", ContentFile("more content"))
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self.assertEqual(obj2.normal.name, "tests/django_test_1.txt")
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# Multiple files with the same name get _N appended to them.
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objs = [Storage() for i in range(3)]
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for o in objs:
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o.normal.save("multiple_files.txt", ContentFile("Same Content"))
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self.assertEqual(
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[o.normal.name for o in objs],
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["tests/multiple_files.txt", "tests/multiple_files_1.txt", "tests/multiple_files_2.txt"]
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)
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for o in objs:
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o.delete()
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# Default values allow an object to access a single file.
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obj3 = Storage.objects.create()
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self.assertEqual(obj3.default.name, "tests/default.txt")
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self.assertEqual(obj3.default.read(), "default content")
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# But it shouldn't be deleted, even if there are no more objects using
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# it.
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obj3.delete()
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obj3 = Storage()
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self.assertEqual(obj3.default.read(), "default content")
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# Verify the fix for #5655, making sure the directory is only
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# determined once.
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obj4 = Storage()
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obj4.random.save("random_file", ContentFile("random content"))
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self.assertTrue(obj4.random.name.endswith("/random_file"))
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# Clean up the temporary files and dir.
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obj1.normal.delete()
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obj2.normal.delete()
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obj3.default.delete()
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obj4.random.delete()
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