move helper method and reuse some existing logic, adjust tests accordingly

app/helpers/collection_time_helper.rb

@@ -10,6 +10,11 @@ module CollectionTimeHelper
     date < window_end_date ? Time.zone.local(date.year - 1, 4, 1) : Time.zone.local(date.year, 4, 1)
   end
 
+  def date_mid_collection_year_formatted(date)
+    example_date = date.nil? ? Time.zone.today : collection_start_date(date).to_date + 5.months
+    example_date.to_formatted_s(:govuk_date_number_month)
+  end
+
   def current_collection_start_date
     Time.zone.local(current_collection_start_year, 4, 1)
   end

app/helpers/question_view_helper.rb

@@ -13,18 +13,6 @@ module QuestionViewHelper
     }
   end
 
-  def example_date_in_tax_year_of(date)
-    return Time.zone.today if date.nil?
-
-    year = if date.month > 4 || (date.month == 4 && date.day > 5)
-             date.year
-           else
-             date.year - 1
-           end
-
-    Date.new(year, 9, 1)
-  end
-
 private
 
   def label_size(page_header, conditional)

app/views/form/_date_question.html.erb

@@ -3,7 +3,7 @@
 <%= f.govuk_date_field question.id.to_sym,
   caption: caption(caption_text, page_header, conditional),
   legend: legend(question, page_header, conditional),
-  hint: { text: question.hint_text&.html_safe || "For example, #{example_date_in_tax_year_of(lettings_log.startdate).to_formatted_s(:govuk_date_number_month)}" },
+  hint: { text: question.hint_text&.html_safe || "For example, #{date_mid_collection_year_formatted(lettings_log.startdate)}" },
   width: 20,
   **stimulus_html_attributes(question) do %>
   <%= govuk_inset_text(text: question.unresolved_hint_text) if question.unresolved_hint_text.present? && @log.unresolved %>

spec/helpers/collection_time_helper_spec.rb

@@ -4,13 +4,13 @@ RSpec.describe CollectionTimeHelper do
   let(:current_user) { create(:user, :data_coordinator) }
   let(:user) { create(:user, :data_coordinator) }
 
-  around do |example|
-    Timecop.freeze(now) do
-      example.run
+  describe "Current collection start year" do
+    around do |example|
+      Timecop.freeze(now) do
+        example.run
+      end
     end
-  end
 
-  describe "Current collection start year" do
     context "when the date is after 1st of April" do
       let(:now) { Time.utc(2022, 8, 3) }
 
@@ -31,4 +31,35 @@ RSpec.describe CollectionTimeHelper do
       end
     end
   end
+
+  describe "#date_mid_collection_year_formatted" do
+    subject(:result) { date_mid_collection_year_formatted(input) }
+
+    context "when called with nil" do
+      let(:input) { nil }
+
+      it "returns the current date" do
+        today = Time.zone.today
+        expect(result).to eq("#{today.day} #{today.month} #{today.year}")
+      end
+    end
+
+    context "when called with a date after the first of April" do
+      calendar_year = 2030
+      let(:input) { Date.new(calendar_year, 7, 7) }
+
+      it "returns the first of September from that year" do
+        expect(result).to eq("1 9 #{calendar_year}")
+      end
+    end
+
+    context "when called with a date before April" do
+      calendar_year = 2040
+      let(:input) { Date.new(calendar_year, 2, 7) }
+
+      it "returns the first of September from the previous year" do
+        expect(result).to eq("1 9 #{calendar_year - 1}")
+      end
+    end
+  end
 end

spec/helpers/question_view_helper_spec.rb

@@ -76,52 +76,4 @@ RSpec.describe QuestionViewHelper do
       end
     end
   end
-
-  describe "#example_date_in_tax_year_of" do
-    subject(:result) { example_date_in_tax_year_of(input) }
-
-    context "when called with nil" do
-      let(:input) { nil }
-
-      it "returns the current date" do
-        expect(result).to eq(Time.zone.today)
-      end
-    end
-
-    context "when called with a date after April" do
-      calendar_year = 2030
-      let(:input) { Date.new(calendar_year, 7, 7) }
-
-      it "returns the first of September from that year" do
-        expect(result).to eq(Date.new(calendar_year, 9, 1))
-      end
-    end
-
-    context "when called with a date before April" do
-      calendar_year = 2040
-      let(:input) { Date.new(calendar_year, 2, 7) }
-
-      it "returns the first of September from the previous year" do
-        expect(result).to eq(Date.new(calendar_year - 1, 9, 1))
-      end
-    end
-
-    context "when called with a date in April after the fifth" do
-      calendar_year = 2050
-      let(:input) { Date.new(calendar_year, 4, 7) }
-
-      it "returns the first of September from that year" do
-        expect(result).to eq(Date.new(calendar_year, 9, 1))
-      end
-    end
-
-    context "when called with a date in April before the sixth" do
-      calendar_year = 2060
-      let(:input) { Date.new(calendar_year, 4, 4) }
-
-      it "returns the first of September from the previous year" do
-        expect(result).to eq(Date.new(calendar_year - 1, 9, 1))
-      end
-    end
-  end
 end