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141 lines
5.5 KiB
Python
141 lines
5.5 KiB
Python
from __future__ import absolute_import
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import gzip
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import shutil
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import tempfile
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from django.core.cache import cache
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from django.core.exceptions import ValidationError
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from django.core.files import File
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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 django.utils import unittest
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from .models import Storage, temp_storage, temp_storage_location
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class FileStorageTests(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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temp_storage.save('tests/default.txt', ContentFile('default content'))
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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(), b"content")
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obj1.normal.close()
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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", b"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), b"con")
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self.assertEqual(obj1.normal.read(), b"tent")
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self.assertEqual(list(obj1.normal.chunks(chunk_size=2)), [b"co", b"nt", b"en", b"t"])
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obj1.normal.close()
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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 does not delete the file it uses.
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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_2.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(), b"default content")
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obj3.default.close()
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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(), b"default content")
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obj3.default.close()
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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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def test_max_length(self):
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"""
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Test that FileField validates the length of the generated file name
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that will be stored in the database. Regression for #9893.
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"""
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# upload_to = 'unused', so file names are saved as '456/xxxxx'.
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# max_length = 16, so names longer than 12 characters are rejected.
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s1 = Storage(random=SimpleUploadedFile(12 * 'x', b"content"))
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s1.full_clean()
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with self.assertRaises(ValidationError):
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Storage(random=SimpleUploadedFile(13 * 'x', b"content")).full_clean()
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# Ticket #18515: validation for an already saved file should not check
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# against a regenerated file name (and potentially raise a ValidationError
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# if max_length is exceeded
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s1.save()
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s1.full_clean()
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class FileTests(unittest.TestCase):
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def test_context_manager(self):
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orig_file = tempfile.TemporaryFile()
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base_file = File(orig_file)
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with base_file as f:
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self.assertIs(base_file, f)
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self.assertFalse(f.closed)
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self.assertTrue(f.closed)
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self.assertTrue(orig_file.closed)
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def test_file_mode(self):
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# Should not set mode to None if it is not present.
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# See #14681, stdlib gzip module crashes if mode is set to None
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file = SimpleUploadedFile("mode_test.txt", b"content")
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self.assertFalse(hasattr(file, 'mode'))
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g = gzip.GzipFile(fileobj=file)
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