Add tests for Pages::VirtualDomain

spec/models/pages/virtual_domain_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Pages::VirtualDomain do
+  describe '#certificate and #key pair' do
+    let(:domain) { nil }
+    let(:project) { instance_double(Project) }
+
+    subject(:virtual_domain) { described_class.new([project], domain: domain) }
+
+    it 'returns nil if there is no domain provided' do
+      expect(virtual_domain.certificate).to be_nil
+      expect(virtual_domain.key).to be_nil
+    end
+
+    context 'when Pages domain is provided' do
+      let(:domain) { instance_double(PagesDomain, certificate: 'certificate', key: 'key') }
+
+      it 'returns certificate and key from the provided domain' do
+        expect(virtual_domain.certificate).to eq('certificate')
+        expect(virtual_domain.key).to eq('key')
+      end
+    end
+  end
+
+  describe '#lookup_paths' do
+    let(:domain) { instance_double(PagesDomain) }
+    let(:project_a) { instance_double(Project) }
+    let(:project_z) { instance_double(Project) }
+    let(:pages_lookup_path_a) { instance_double(Pages::LookupPath, prefix: 'aaa') }
+    let(:pages_lookup_path_z) { instance_double(Pages::LookupPath, prefix: 'zzz') }
+
+    subject(:virtual_domain) { described_class.new([project_a, project_z], domain: domain) }
+
+    it 'returns collection of projects pages lookup paths sorted by prefix in reverse' do
+      expect(project_a).to receive(:pages_lookup_path).with(domain: domain).and_return(pages_lookup_path_a)
+      expect(project_z).to receive(:pages_lookup_path).with(domain: domain).and_return(pages_lookup_path_z)
+
+      expect(virtual_domain.lookup_paths).to eq([pages_lookup_path_z, pages_lookup_path_a])
+    end
+  end
+end