Added specs for TrendingProjectsFinder

spec/finders/trending_projects_finder_spec.rb

+require 'spec_helper'
+
+describe TrendingProjectsFinder do
+  let(:user)  { create(:user) }
+  let(:group) { create(:group) }
+
+  let(:project1) { create(:empty_project, :public, group: group) }
+  let(:project2) { create(:empty_project, :public, group: group) }
+
+  before do
+    2.times do
+      create(:note_on_commit, project: project1)
+    end
+
+    create(:note_on_commit, project: project2)
+  end
+
+  describe '#execute' do
+    describe 'without an explicit start date' do
+      subject { described_class.new.execute(user).to_a }
+
+      it 'sorts Projects by the amount of notes in descending order' do
+        expect(subject).to eq([project1, project2])
+      end
+    end
+
+    describe 'with an explicit start date' do
+      let(:date) { 2.months.ago }
+
+      subject { described_class.new.execute(user, date).to_a }
+
+      before do
+        2.times do
+          create(:note_on_commit, project: project2, created_at: date)
+        end
+      end
+
+      it 'sorts Projects by the amount of notes in descending order' do
+        expect(subject).to eq([project2, project1])
+      end
+    end
+  end
+end