163 lines
6.3 KiB
Python
163 lines
6.3 KiB
Python
from __future__ import unicode_literals
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import os
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import gzip
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import shutil
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import tempfile
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import unittest
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from django.core.cache import cache
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from django.core.files import File
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from django.core.files.move import file_move_safe
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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.six import StringIO
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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_file_object(self):
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# Create sample file
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temp_storage.save('tests/example.txt', ContentFile('some content'))
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# Load it as python file object
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with open(temp_storage.path('tests/example.txt')) as file_obj:
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# Save it using storage and read its content
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temp_storage.save('tests/file_obj', file_obj)
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self.assertTrue(temp_storage.exists('tests/file_obj'))
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with temp_storage.open('tests/file_obj') as f:
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self.assertEqual(f.read(), b'some content')
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def test_stringio(self):
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# Test passing StringIO instance as content argument to save
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output = StringIO()
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output.write('content')
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output.seek(0)
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# Save it and read written file
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temp_storage.save('tests/stringio', output)
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self.assertTrue(temp_storage.exists('tests/stringio'))
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with temp_storage.open('tests/stringio') as f:
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self.assertEqual(f.read(), b'content')
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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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class FileMoveSafeTests(unittest.TestCase):
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def test_file_move_overwrite(self):
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handle_a, self.file_a = tempfile.mkstemp(dir=os.environ['DJANGO_TEST_TEMP_DIR'])
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handle_b, self.file_b = tempfile.mkstemp(dir=os.environ['DJANGO_TEST_TEMP_DIR'])
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# file_move_safe should raise an IOError exception if destination file exists and allow_overwrite is False
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self.assertRaises(IOError, lambda: file_move_safe(self.file_a, self.file_b, allow_overwrite=False))
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# should allow it and continue on if allow_overwrite is True
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self.assertIsNone(file_move_safe(self.file_a, self.file_b, allow_overwrite=True))
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