Add date_presenter specs

spec/dsu/presenters/entry_group/list/date_presenter_spec.rb

@@ -0,0 +1,86 @@
+# frozen_string_literal: true
+
+RSpec.describe Dsu::Presenters::EntryGroup::List::DatePresenter do
+  subject(:presenter) do
+    strip_escapes(Dsu::Services::StdoutRedirectorService.call do
+      described_class.new(times: times, options: options).render
+    end)
+  end
+
+  shared_examples 'the presenter raises an error' do
+    let(:expected_error) do
+      'display_nothing_to_list_message called when there are entries to display'
+    end
+
+    it 'raises an error' do
+      expect { presenter_display_nothing_to_list_message }.to raise_error(expected_error)
+    end
+  end
+
+  let(:time) { Time.now.in_time_zone }
+  let(:times) { [time] }
+  let(:options) { {} }
+
+  describe '#display_nothing_to_list_message' do
+    subject(:presenter) do
+      described_class.new(times: times, options: options)
+    end
+
+    let(:presenter_display_nothing_to_list_message) do
+      strip_escapes(Dsu::Services::StdoutRedirectorService.call do
+        presenter.display_nothing_to_list_message
+      end)
+    end
+
+    context 'when there is only one time passed in the array' do
+      context 'when there is no entry group for the date' do
+        it do
+          expect(presenter.nothing_to_list?).to be(false)
+        end
+
+        it 'displays nothing' do
+          expect(presenter_display_nothing_to_list_message).to be_blank
+        end
+      end
+
+      context 'when there is an entry group for the date' do
+        before do
+          create(:entry_group, :with_entries, time: times.first)
+        end
+
+        it do
+          expect(presenter.nothing_to_list?).to be(false)
+        end
+
+        it 'displays nothing' do
+          expect(presenter_display_nothing_to_list_message).to be_blank
+        end
+      end
+    end
+
+    context 'when there is more than one time passed in the array' do
+      let(:times) { [time, time.yesterday] }
+
+      context 'when there are entry groups for the times' do
+        it do
+          expect(presenter.nothing_to_list?).to be(false)
+        end
+
+        it_behaves_like 'the presenter raises an error'
+      end
+
+      context 'when there is at least one entry group for the times' do
+        before do
+          create(:entry_group, :with_entries, time: times.min)
+          create(:entry_group, :with_entries, time: times.max)
+        end
+
+        it do
+          expect(presenter.nothing_to_list?).to be(false)
+        end
+
+        it_behaves_like 'the presenter raises an error'
+      end
+    end
+  end
+end