Statistics tests: strict first_join_year nil, fee_type_id in URL

test/mv/statistics_test.exs

@@ -46,9 +46,9 @@ defmodule Mv.StatisticsTest do
     end
 
     test "returns nil when no members exist", %{actor: actor} do
-      # Relies on empty member table for this test; may be nil if other tests created members
+      # Expects empty member table (sandbox isolation). If flaky, ensure no other test creates members.
       result = Statistics.first_join_year(actor: actor)
-      assert result == nil or is_integer(result)
+      assert result == nil
     end
   end
 

test/mv_web/live/statistics_live_test.exs

@@ -6,6 +6,8 @@ defmodule MvWeb.StatisticsLiveTest do
 
   import Phoenix.LiveViewTest
 
+  alias Mv.MembershipFees.MembershipFeeType
+
   describe "statistics page" do
     test "renders statistics page with title and key labels for authenticated user with access",
          %{
@@ -28,5 +30,36 @@ defmodule MvWeb.StatisticsLiveTest do
       # table header or legend
       assert html =~ "Year"
     end
+
+    test "fee_type_id in URL updates selected filter and contributions", %{conn: conn} do
+      actor = Mv.Helpers.SystemActor.get_system_actor()
+
+      fee_types =
+        MembershipFeeType
+        |> Ash.Query.sort(name: :asc)
+        |> Ash.read!(domain: Mv.MembershipFees, actor: actor)
+
+      fee_type =
+        case List.first(fee_types) do
+          nil ->
+            MembershipFeeType
+            |> Ash.Changeset.for_create(:create, %{
+              name: "Test Fee #{System.unique_integer([:positive])}",
+              amount: Decimal.new("50.00"),
+              interval: :yearly
+            })
+            |> Ash.create!(actor: actor)
+
+          ft ->
+            ft
+        end
+
+      path = ~p"/statistics" <> "?" <> URI.encode_query(%{"fee_type_id" => fee_type.id})
+      {:ok, view, html} = live(conn, path)
+
+      assert view |> element("select#fee-type-filter") |> has_element?()
+      assert html =~ fee_type.name
+      assert html =~ "Contributions by year"
+    end
   end
 end