Tests: restore settings in on_exit to avoid leftover state

Setup + on_exit save/restore member_field_visibility and
member_field_required in member, setting, index_component and
form_error_handling tests.

test/membership/member_test.exs

@@ -99,6 +99,23 @@ defmodule Mv.Membership.MemberTest do
       email: "john@example.com"
     }
 
+    setup do
+      {:ok, settings} = Membership.get_settings()
+      saved_visibility = settings.member_field_visibility || %{}
+      saved_required = settings.member_field_required || %{}
+
+      on_exit(fn ->
+        {:ok, s} = Membership.get_settings()
+
+        Membership.update_settings(s, %{
+          member_field_visibility: saved_visibility,
+          member_field_required: saved_required
+        })
+      end)
+
+      :ok
+    end
+
     test "when first_name is required in settings, create without first_name fails", %{
       actor: actor
     } do
@@ -117,15 +134,6 @@ defmodule Mv.Membership.MemberTest do
                Membership.create_member(attrs, actor: actor)
 
       assert error_message(errors, :first_name) =~ "can't be blank"
-
-      # Reset so other tests (e.g. "First name is optional") are not affected
-      {:ok, settings} = Membership.get_settings()
-
-      Membership.update_single_member_field(settings,
-        field: "first_name",
-        show_in_overview: true,
-        required: false
-      )
     end
 
     test "when first_name is required in settings, create with first_name succeeds", %{
@@ -141,15 +149,6 @@ defmodule Mv.Membership.MemberTest do
         )
 
       assert {:ok, _member} = Membership.create_member(@valid_attrs, actor: actor)
-
-      # Reset
-      {:ok, settings} = Membership.get_settings()
-
-      Membership.update_single_member_field(settings,
-        field: "first_name",
-        show_in_overview: true,
-        required: false
-      )
     end
   end