Title: Name of book: Programming Phoenix LiveView
Second to last page on Section 10 - Unit Test Test Survey Results State

testing/pento/test/pento_web/live/survey_results_live_test.exs

    test "ratings are filtered by age group", %{
        socket: socket,
        user: user,
        product: product,
        user2: user2} do
      create_rating(2, user, product)
      create_rating(3, user2, product)

      socket
      |> SurveyResultsLive.assign_age_group_filter()
      |> assert_keys(:age_group_filter, "all")
      |> update_socket(:age_group_filter, "18 and under")
      |> SurveyResultsLive.assign_age_group_filter()
      |> assert_keys(:age_group_filter, "18 and under")
      |> SurveyResultsLive.assign_gender_filter()
      |> SurveyResultsLive.assign_products_with_average_ratings()
      |> assert_keys(:products_with_average_ratings, [{"Test Game", 2.0}])
    end

Should be updated with “18 and under” on second SurveyResultsLive.assign_age_group_filter()

testing/pento/test/pento_web/live/survey_results_live_test.exs

    test "ratings are filtered by age group", %{
        socket: socket,
        user: user,
        product: product,
        user2: user2} do
      create_rating(2, user, product)
      create_rating(3, user2, product)

      socket
      |> SurveyResultsLive.assign_age_group_filter()
      |> assert_keys(:age_group_filter, "all")
      |> update_socket(:age_group_filter, "18 and under")
      |> SurveyResultsLive.assign_age_group_filter("18 and under")
      |> assert_keys(:age_group_filter, "18 and under")
      |> SurveyResultsLive.assign_gender_filter()
      |> SurveyResultsLive.assign_products_with_average_ratings()
      |> assert_keys(:products_with_average_ratings, [{"Test Game", 2.0}])
    end