FIX: Wrong order for `S3Helper#copy_file`.

lib/s3_helper.rb

@@ -33,8 +33,8 @@ class S3Helper
     # copy the file in tombstone
     if copy_to_tombstone && @tombstone_prefix.present?
       self.copy(
-        File.join(@tombstone_prefix, s3_filename),
-        get_path_for_s3_upload(s3_filename)
+        get_path_for_s3_upload(s3_filename),
+        File.join(@tombstone_prefix, s3_filename)
       )
     end
 
@@ -45,8 +45,8 @@ class S3Helper
 
   def copy(source, destination)
     s3_bucket
-      .object(source)
-      .copy_from(copy_source: File.join(@s3_bucket_name, destination))
+      .object(destination)
+      .copy_from(copy_source: File.join(@s3_bucket_name, source))
   end
 
   # make sure we have a cors config for assets

spec/components/file_store/s3_store_spec.rb

@@ -125,10 +125,10 @@ describe FileStore::S3Store do
 
         s3_object = stub
 
-        s3_bucket.expects(:object).with(source).returns(s3_object)
+        s3_bucket.expects(:object).with(destination).returns(s3_object)
 
         s3_object.expects(:copy_from).with(
-          copy_source: "s3-upload-bucket/#{destination}"
+          copy_source: "s3-upload-bucket/#{source}"
         )
 
         store.copy_file(upload.url, source, destination)