Add test

test/models/everything_tag_test.rb

@@ -0,0 +1,15 @@
+require "test_helper"
+
+class EverythingTagTest < ActiveSupport::TestCase
+  test "adds everything tag to every thread" do
+    box = boxes(:ssd_main)
+    thread = box.message_threads.create!(
+      title: 'Test',
+      original_title: 'Test',
+      delivered_at: Time.current,
+      last_message_delivered_at: Time.current
+    )
+
+    assert_includes thread.tags, box.tenant.everything_tag
+  end
+end

test/models/message_test.rb

@@ -35,8 +35,4 @@ class MessageTest < ActiveSupport::TestCase
     assert_not message.tags.include?(tag)
     assert message.thread.tags.include?(tag)
   end
-
-  test "adds everything tag to every message" do
-
-  end
 end