Extract trigger_hook/3-4 test helper

test/support/live_test_helpers.ex

@@ -4,4 +4,13 @@ defmodule MusicLibraryWeb.LiveTestHelpers do
     |> Phoenix.HTML.html_escape()
     |> Phoenix.HTML.safe_to_string()
   end
+
+  def trigger_hook(session, selector, hook, params \\ %{}) do
+    session
+    |> PhoenixTest.unwrap(fn view ->
+      view
+      |> Phoenix.LiveViewTest.element(selector)
+      |> Phoenix.LiveViewTest.render_hook(hook, params)
+    end)
+  end
 end