Fixed #22337: FileSystemStorage marked as deconstructible and tested.

django/core/files/storage.py

@@ -13,6 +13,7 @@ from django.utils.module_loading import import_string
 from django.utils.six.moves.urllib.parse import urljoin
 from django.utils.text import get_valid_filename
 from django.utils._os import safe_join, abspathu
+from django.utils.deconstruct import deconstructible
 
 
 __all__ = ('Storage', 'FileSystemStorage', 'DefaultStorage', 'default_storage')
@@ -144,6 +145,7 @@ class Storage(object):
         raise NotImplementedError('subclasses of Storage must provide a modified_time() method')
 
 
+@deconstructible
 class FileSystemStorage(Storage):
     """
     Standard filesystem storage

tests/field_deconstruction/tests.py

@@ -3,6 +3,7 @@ import warnings
 from django.db import models
 from django.test import TestCase, override_settings
 from django.utils import six
+from django.core.files.storage import FileSystemStorage
 
 
 class FieldDeconstructionTests(TestCase):
@@ -141,6 +142,7 @@ class FieldDeconstructionTests(TestCase):
         self.assertEqual(path, "django.db.models.FileField")
         self.assertEqual(args, [])
         self.assertEqual(kwargs, {"upload_to": "foo/bar"})
+        # Test max_length
         field = models.FileField(upload_to="foo/bar", max_length=200)
         name, path, args, kwargs = field.deconstruct()
         self.assertEqual(path, "django.db.models.FileField")

tests/file_storage/tests.py

@@ -64,6 +64,23 @@ class GetStorageClassTests(SimpleTestCase):
                 'django.core.files.non_existing_storage.NonExistingStorage')
 
 
+class FileStorageDeconstructionTests(unittest.TestCase):
+
+    def test_deconstruction(self):
+        path, args, kwargs = temp_storage.deconstruct()
+        self.assertEqual(path, "django.core.files.storage.FileSystemStorage")
+        self.assertEqual(args, tuple())
+        self.assertEqual(kwargs, {'location': temp_storage_location})
+
+        kwargs_orig = {
+            'location': temp_storage_location,
+            'base_url': 'http://myfiles.example.com/'
+        }
+        storage = FileSystemStorage(**kwargs_orig)
+        path, args, kwargs = storage.deconstruct()
+        self.assertEqual(kwargs, kwargs_orig)
+
+
 class FileStorageTests(unittest.TestCase):
     storage_class = FileSystemStorage