Improve upload filter return values so we can identify when filters make no changes to the input

test/upload/filter/anonymize_filename_test.exs

@@ -24,18 +24,18 @@ defmodule Pleroma.Upload.Filter.AnonymizeFilenameTest do
 
   test "it replaces filename on pre-defined text", %{upload_file: upload_file} do
     Config.put([Upload.Filter.AnonymizeFilename, :text], "custom-file.png")
-    {:ok, %Upload{name: name}} = Upload.Filter.AnonymizeFilename.filter(upload_file)
+    {:ok, :filtered, %Upload{name: name}} = Upload.Filter.AnonymizeFilename.filter(upload_file)
     assert name == "custom-file.png"
   end
 
   test "it replaces filename on pre-defined text expression", %{upload_file: upload_file} do
     Config.put([Upload.Filter.AnonymizeFilename, :text], "custom-file.{extension}")
-    {:ok, %Upload{name: name}} = Upload.Filter.AnonymizeFilename.filter(upload_file)
+    {:ok, :filtered, %Upload{name: name}} = Upload.Filter.AnonymizeFilename.filter(upload_file)
     assert name == "custom-file.jpg"
   end
 
   test "it replaces filename on random text", %{upload_file: upload_file} do
-    {:ok, %Upload{name: name}} = Upload.Filter.AnonymizeFilename.filter(upload_file)
+    {:ok, :filtered, %Upload{name: name}} = Upload.Filter.AnonymizeFilename.filter(upload_file)
     assert <<_::bytes-size(14)>> <> ".jpg" = name
     refute name == "an… image.jpg"
   end

test/upload/filter/dedupe_test.exs

@@ -25,6 +25,7 @@ defmodule Pleroma.Upload.Filter.DedupeTest do
 
     assert {
              :ok,
+             :filtered,
              %Pleroma.Upload{id: @shasum, path: @shasum <> ".jpg"}
            } = Dedupe.filter(upload)
   end

test/upload/filter/exiftool_test.exs

@@ -21,7 +21,7 @@ defmodule Pleroma.Upload.Filter.ExiftoolTest do
       tempfile: Path.absname("test/fixtures/DSCN0010_tmp.jpg")
     }
 
-    assert Filter.Exiftool.filter(upload) == :ok
+    assert Filter.Exiftool.filter(upload) == {:ok, :filtered}
 
     {exif_original, 0} = System.cmd("exiftool", ["test/fixtures/DSCN0010.jpg"])
     {exif_filtered, 0} = System.cmd("exiftool", ["test/fixtures/DSCN0010_tmp.jpg"])

test/upload/filter/mogrifun_test.exs

@@ -36,7 +36,7 @@ defmodule Pleroma.Upload.Filter.MogrifunTest do
          save: fn _f, _o -> :ok end
        ]}
     ]) do
-      assert Filter.Mogrifun.filter(upload) == :ok
+      assert Filter.Mogrifun.filter(upload) == {:ok, :filtered}
     end
 
     Task.await(task)

test/upload/filter/mogrify_test.exs

@@ -33,7 +33,7 @@ defmodule Pleroma.Upload.Filter.MogrifyTest do
       custom: fn _m, _a -> :ok end,
       custom: fn m, a, o -> send(task.pid, {:apply_filter, {m, a, o}}) end,
       save: fn _f, _o -> :ok end do
-      assert Filter.Mogrify.filter(upload) == :ok
+      assert Filter.Mogrify.filter(upload) == {:ok, :filtered}
     end
 
     Task.await(task)