Fixed bug in local file storage URL generation.

tests/test_api/test_file_storage_backends.py

@@ -0,0 +1,32 @@
+import typing
+
+from pillar.tests import AbstractPillarTest
+
+
+class LocalStorageBackendTest(AbstractPillarTest):
+
+    def test_upload_download(self):
+        import io
+        import secrets
+
+        from pillar.api.file_storage_backends import Bucket
+
+        file_contents = secrets.token_bytes(512)
+        test_file: typing.IO = io.BytesIO(file_contents)
+
+        with self.app.test_request_context():
+            bucket_class = Bucket.for_backend('local')
+            bucket = bucket_class('buckettest')
+            blob = bucket.blob('somefile.bin')
+
+            # We should be able to upload the file, and then download it again
+            # from the URL given by its blob.
+            blob.create_from_file(test_file, file_size=512, content_type='application/octet-stream')
+
+            url = blob.get_url(is_public=True)
+
+        resp = self.get(url)
+
+        self.assertEqual(200, resp.status_code)
+        self.assertEqual('512', resp.headers['Content-Length'])
+        self.assertEqual(file_contents, resp.data)