jobs: migrate mass updates to ActiveJob.

Also fixes a bug where mod actions weren't logged on mass updates.
Creating the mod action silently failed because it was called when
CurrentUser wasn' set.

test/unit/moderator/tag_batch_change_test.rb

@@ -1,77 +0,0 @@
-require "test_helper"
-
-module Moderator
-  class TagBatchChangeTest < ActiveSupport::TestCase
-    def setup
-      super
-      mock_saved_search_service!
-    end
-
-    context "a tag batch change" do
-      setup do
-        @user = FactoryBot.create(:moderator_user)
-        CurrentUser.user = @user
-        CurrentUser.ip_addr = "127.0.0.1"
-        @post = FactoryBot.create(:post, :tag_string => "aaa")
-      end
-
-      teardown do
-        CurrentUser.user = nil
-        CurrentUser.ip_addr = nil
-      end
-
-      context "#estimate_update_count" do
-        setup do
-          @change = TagBatchChange.new("aaa", "bbb", @user.id, "127.0.0.1")
-        end
-
-        should "find the correct count" do
-          assert_equal(1, @change.estimate_update_count)
-        end
-      end
-
-      should "execute" do
-        tag_batch_change = TagBatchChange.new("aaa", "bbb", @user.id, "127.0.0.1")
-        tag_batch_change.perform
-        @post.reload
-        assert_equal("bbb", @post.tag_string)
-      end
-
-      should "move saved searches" do
-        ss = FactoryBot.create(:saved_search, :user => @user, :query => "123 ... 456")
-        tag_batch_change = TagBatchChange.new("...", "bbb", @user.id, "127.0.0.1")
-        tag_batch_change.perform
-
-        assert_equal("123 456 bbb", ss.reload.normalized_query)
-      end
-
-      should "move blacklists" do
-        @user.update(blacklisted_tags: "123 456\n789\n")
-        tag_batch_change = TagBatchChange.new("456", "xxx", @user.id, "127.0.0.1")
-        tag_batch_change.perform
-        @user.reload
-        assert_equal("123 xxx\n789", @user.blacklisted_tags)
-      end
-
-      should "move only saved searches that match the mass update exactly" do
-        ss = FactoryBot.create(:saved_search, :user => @user, :query => "123 ... 456")
-        tag_batch_change = TagBatchChange.new("1", "bbb", @user.id, "127.0.0.1")
-        tag_batch_change.perform
-
-        assert_equal("... 123 456", ss.reload.normalized_query, "expected '123' to remain unchanged")
-
-        tag_batch_change = TagBatchChange.new("123 456", "789", @user.id, "127.0.0.1")
-        tag_batch_change.perform
-
-        assert_equal("... 789", ss.reload.normalized_query, "expected '123 456' to be changed to '789'")
-      end
-
-      should "raise an error if there is no predicate" do
-        tag_batch_change = TagBatchChange.new("", "bbb", @user.id, "127.0.0.1")
-        assert_raises(TagBatchChange::Error) do
-          tag_batch_change.perform
-        end
-      end
-    end
-  end
-end