Add coverage for AnnualReport::* source child classes (#31849)

spec/lib/annual_report/percentiles_spec.rb

@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe AnnualReport::Percentiles do
+  describe '#generate' do
+    subject { described_class.new(account, Time.zone.now.year) }
+
+    context 'with an inactive account' do
+      let(:account) { Fabricate :account }
+
+      it 'builds a report for an account' do
+        expect(subject.generate)
+          .to include(
+            percentiles: include(
+              followers: 0,
+              statuses: 0
+            )
+          )
+      end
+    end
+
+    context 'with an active account' do
+      let(:account) { Fabricate :account }
+
+      before do
+        Fabricate.times 2, :status # Others as `account`
+        Fabricate.times 2, :follow # Others as `target_account`
+        Fabricate.times 2, :status, account: account
+        Fabricate.times 2, :follow, target_account: account
+      end
+
+      it 'builds a report for an account' do
+        expect(subject.generate)
+          .to include(
+            percentiles: include(
+              followers: 50,
+              statuses: 50
+            )
+          )
+      end
+    end
+  end
+end