basic specs

spec/services/fetch_reports_spec.rb

@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+RSpec.describe(DiscourseRewind::FetchReports) do
+  describe ".call" do
+    fab!(:current_user) { Fabricate(:user) }
+
+    let(:guardian) { Guardian.new(current_user) }
+    let(:dependencies) { { guardian: } }
+
+    subject(:result) { described_class.call(**dependencies) }
+
+    context "when in january" do
+      before { freeze_time DateTime.parse("2021-01-22") }
+
+      it "computes the correct previous year" do
+        expect(result.year).to eq(2020)
+      end
+    end
+
+    context "when in december" do
+      before { freeze_time DateTime.parse("2021-12-22") }
+
+      it "computes the correct previous year" do
+        expect(result.year).to eq(2021)
+      end
+    end
+
+    context "when out of valid months december" do
+      before { freeze_time DateTime.parse("2021-02-22") }
+
+      it { is_expected.to fail_to_find_a_model(:year) }
+    end
+
+    context "when reports is cached" do
+      it "returns the cached reports" do
+        expect(result.reports.length).to eq(9)
+
+        expect(DiscourseRewind::Action::TopWords).not_to receive(:call)
+
+        expect(result.reports.length).to eq(9)
+      end
+    end
+
+    context "when reports is not cached" do
+      before do
+        freeze_time DateTime.parse("2021-01-22")
+        Discourse.redis.del("rewind:#{current_user.username}:2020")
+      end
+
+      it "returns the reports" do
+        expect(DiscourseRewind::Action::TopWords).to receive(:call)
+        expect(result.reports.length).to eq(9)
+      end
+    end
+  end
+end