Merge branch 'migrate-legacy-tags' into 'develop'

Migrate legacy tags set by AdminFE to match TagPolicy, #2010

See merge request pleroma/pleroma!2836

test/migrations/20200802170532_fix_legacy_tags_test.exs

@@ -0,0 +1,24 @@
+defmodule Pleroma.Repo.Migrations.FixLegacyTagsTest do
+  alias Pleroma.User
+  use Pleroma.DataCase
+  import Pleroma.Factory
+  import Pleroma.Tests.Helpers
+
+  setup_all do: require_migration("20200802170532_fix_legacy_tags")
+
+  test "change/0 converts legacy user tags into correct values", %{migration: migration} do
+    user = insert(:user, tags: ["force_nsfw", "force_unlisted", "verified"])
+    user2 = insert(:user)
+
+    assert :ok == migration.change()
+
+    fixed_user = User.get_by_id(user.id)
+    fixed_user2 = User.get_by_id(user2.id)
+
+    assert fixed_user.tags == ["mrf_tag:media-force-nsfw", "mrf_tag:force-unlisted", "verified"]
+    assert fixed_user2.tags == []
+
+    # user2 should not have been updated
+    assert fixed_user2.updated_at == fixed_user2.inserted_at
+  end
+end