component-system/test/components_elixir_web/controllers/page_controller_test.exs

defmodule ComponentsElixirWeb.PageControllerTest do
  use ComponentsElixirWeb.ConnCase

  test "GET /", %{conn: conn} do
    conn = get(conn, ~p"/")
    assert html_response(conn, 200) =~ "Peace of mind from prototype to production"
  end
end