SRCH-2308 add specs for NewsSearchHelper#current_time_filter_descript…

…ion (#735)

spec/helpers/news_search_helper_spec.rb

@@ -54,4 +54,45 @@
       end
     end
   end
+
+  describe '#current_time_filter_description' do
+    subject(:current_time_filter_description) do
+      helper.current_time_filter_description(search)
+    end
+
+    let(:tbs) { nil }
+    let(:since) { nil }
+    let(:until_time) { nil }
+    let(:search) do
+      instance_double(NewsSearch, tbs: tbs, since: since, until: until_time)
+    end
+
+    it { is_expected.to eq 'Any time' }
+
+    context 'when searching by the most recent month' do
+      let(:tbs) { 'm' }
+
+      it { is_expected.to eq 'Last month' }
+    end
+
+    context 'when searching after a time' do
+      let(:since) { Time.utc(2021, 5, 1) }
+
+      before { travel_to(Time.utc(2021, 6, 3)) }
+
+      after { travel_back }
+
+      it 'describes a range from the given date to the current date' do
+        expect(current_time_filter_description).to eq 'May 1, 2021 - Jun 3, 2021'
+      end
+    end
+
+    context 'when searching before a time' do
+      let(:until_time) { Time.utc(2021, 6, 3) }
+
+      it 'describes a range up to the given date' do
+        expect(current_time_filter_description).to eq 'Before Jun 3, 2021'
+      end
+    end
+  end
 end