test/membership/setting_join_form_test.exs

@@ -56,13 +56,6 @@ defmodule Mv.Membership.SettingJoinFormTest do
     Membership.update_settings(settings, attrs)
   end
 
-  defp _error_message(errors, field) when is_atom(field) do
-    errors
-    |> Enum.filter(fn err -> Map.get(err, :field) == field end)
-    |> Enum.map(&Map.get(&1, :message, ""))
-    |> List.first() || ""
-  end
-
   # ---- 1. Persistence and loading ----
 
   describe "join form settings persistence and loading" do

test/mv_web/live/join_live_test.exs

@@ -14,6 +14,7 @@ defmodule MvWeb.JoinLiveTest do
   import Phoenix.LiveViewTest
   import Ecto.Query
 
+  alias Ecto.Adapters.SQL.Sandbox
   alias Mv.Membership
   alias Mv.Repo
 
@@ -45,6 +46,9 @@ defmodule MvWeb.JoinLiveTest do
       count_before = count_join_requests()
       {:ok, view, _html} = live(conn, "/join")
 
+      # Allow LiveView process to use the same Ecto sandbox so the test sees the created JoinRequest.
+      Sandbox.allow(Repo, conn.private[:ecto_sandbox], view.pid)
+
       view
       |> form("#join-form", %{
         "email" => "newuser#{System.unique_integer([:positive])}@example.com",