feat(overview): add point-in-time, suspended, OR-group and count-range filters

test/mv_web/member_live/index_payment_period_test.exs

@@ -40,6 +40,43 @@ defmodule MvWeb.MemberLive.IndexPaymentPeriodTest do
     end
   end
 
+  describe "period short code (§1.28)" do
+    test "the all-outstanding default has no short code" do
+      assert PaymentAging.period_short_code(%{from: nil, to: nil}) == nil
+    end
+
+    test "a full calendar year renders as the year" do
+      assert PaymentAging.period_short_code(%{from: ~D[2026-01-01], to: ~D[2026-12-31]}) == "2026"
+    end
+
+    test "a full calendar quarter renders as Q# YYYY" do
+      assert PaymentAging.period_short_code(%{from: ~D[2026-01-01], to: ~D[2026-03-31]}) ==
+               "Q1 2026"
+
+      assert PaymentAging.period_short_code(%{from: ~D[2026-10-01], to: ~D[2026-12-31]}) ==
+               "Q4 2026"
+    end
+
+    test "an arbitrary bounded period has no compact short code" do
+      assert PaymentAging.period_short_code(%{from: ~D[2026-02-03], to: ~D[2026-08-17]}) == nil
+      # An open-ended period is not compactly codeable either.
+      assert PaymentAging.period_short_code(%{from: ~D[2026-01-01], to: nil}) == nil
+    end
+  end
+
+  describe "period tooltip (§1.28)" do
+    test "names the period with locally formatted bounds" do
+      tip = PaymentAging.period_tooltip(%{from: ~D[2026-01-01], to: ~D[2026-12-31]})
+      assert tip =~ "01.01.2026"
+      assert tip =~ "31.12.2026"
+    end
+
+    test "the all-outstanding default reads as all outstanding" do
+      tip = PaymentAging.period_tooltip(%{from: nil, to: nil})
+      assert is_binary(tip) and tip =~ "outstanding"
+    end
+  end
+
   describe "payment-count filter codec" do
     test "round-trips fully_paid and has-unpaid thresholds" do
       for state <- [:fully_paid, {:has_unpaid, 1}, {:has_unpaid, 2}, {:has_unpaid, 3}] do