Refactor IP registrar restriction

#600

spec/models/authorization/restricted_ip_spec.rb

@@ -0,0 +1,94 @@
+require 'rails_helper'
+
+RSpec.describe Authorization::RestrictedIP do
+  describe '#enabled?', db: true, settings: false do
+    context 'when "registrar_ip_whitelist_enabled" is true' do
+      before do
+        Setting.registrar_ip_whitelist_enabled = true
+      end
+
+      specify do
+        expect(described_class).to be_enabled
+      end
+    end
+
+    context 'when "registrar_ip_whitelist_enabled" is false' do
+      before do
+        Setting.registrar_ip_whitelist_enabled = false
+      end
+
+      specify do
+        expect(described_class).to_not be_enabled
+      end
+    end
+  end
+
+  describe '#can_access_registrar_area?', db: true do
+    let(:registrar) { create(:registrar) }
+    subject(:allowed) { described_class.new('127.0.0.1').can_access_registrar_area?(registrar) }
+
+    context 'when enabled' do
+      before do
+        allow(described_class).to receive(:enabled?).and_return(true)
+      end
+
+      context 'when ip is whitelisted', db: true do
+        let!(:white_ip) { create(:white_ip, registrar: registrar, ipv4: '127.0.0.1', interfaces: [WhiteIp::REGISTRAR]) }
+
+        specify do
+          expect(allowed).to be true
+        end
+      end
+
+      context 'when ip is not whitelisted' do
+        specify do
+          expect(allowed).to be false
+        end
+      end
+    end
+
+    context 'when disabled' do
+      before do
+        allow(described_class).to receive(:enabled?).and_return(false)
+      end
+
+      specify do
+        expect(allowed).to be true
+      end
+    end
+  end
+
+  describe '#can_access_registrar_area_sign_in_page?' do
+    subject(:allowed) { described_class.new('127.0.0.1').can_access_registrar_area_sign_in_page? }
+
+    context 'when enabled' do
+      before do
+        allow(described_class).to receive(:enabled?).and_return(true)
+      end
+
+      context 'when ip is whitelisted', db: true do
+        let!(:white_ip) { create(:white_ip, ipv4: '127.0.0.1', interfaces: [WhiteIp::REGISTRAR]) }
+
+        specify do
+          expect(allowed).to be true
+        end
+      end
+
+      context 'when ip is not whitelisted' do
+        specify do
+          expect(allowed).to be false
+        end
+      end
+    end
+
+    context 'when disabled' do
+      before do
+        allow(described_class).to receive(:enabled?).and_return(false)
+      end
+
+      specify do
+        expect(allowed).to be true
+      end
+    end
+  end
+end