CLDC-4325: Fix old rake task tests

spec/lib/tasks/recalculate_invalid_reasonpref_dontknow_spec.rb

@@ -26,6 +26,15 @@ RSpec.describe "recalculate_invalid_reasonpref_dontknow" do
   end
   let(:valid_logs) { create_list(:lettings_log, 3, :completed, :ignore_validation_errors, reasonpref: 1, rp_dontknow: 0, rp_homeless: 1, rp_insan_unsat: 1, rp_medwel: rand(2), rp_hardship: rand(2), updated_at: Time.zone.local(2024, 4, 2, 12, 0, 0), startdate: Time.zone.local(2024, rand(4..12), rand(1..30))) }
 
+  context "when 2025", metadata: { year: 25 } do
+    before do
+      Timecop.travel(collection_start_date_for_year(2025))
+    end
+
+    after do
+      Timecop.return
+    end
+
     it "updates the logs from 2024/25 with invalid rp_dontknow values" do
       invalid_logs.each do |log|
         expect(log.reasonpref).to eq(1)
@@ -74,4 +83,5 @@ RSpec.describe "recalculate_invalid_reasonpref_dontknow" do
         expect(log.updated_at).to eq(Time.zone.local(2024, 4, 2, 12, 0, 0))
       end
     end
+  end
 end