Basic FASP support (#34031)

spec/lib/fasp/request_spec.rb

@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+require 'securerandom'
+
+RSpec.describe Fasp::Request do
+  include ProviderRequestHelper
+
+  subject { described_class.new(provider) }
+
+  let(:provider) do
+    Fabricate(:fasp_provider, base_url: 'https://reqprov.example.com/fasp')
+  end
+
+  shared_examples 'a provider request' do |method|
+    context 'when the response is signed by the provider' do
+      before do
+        stub_provider_request(provider, method:, path: '/test_path')
+      end
+
+      it "performs a signed #{method.to_s.upcase} request relative to the base_path of the fasp" do
+        subject.send(method, '/test_path')
+
+        expect(WebMock).to have_requested(method, 'https://reqprov.example.com/fasp/test_path')
+          .with(headers: {
+            'Signature' => /.+/,
+            'Signature-Input' => /.+/,
+          })
+      end
+    end
+
+    context 'when the response is not signed' do
+      before do
+        stub_request(method, 'https://reqprov.example.com/fasp/test_path')
+          .to_return(status: 200)
+      end
+
+      it 'raises an error' do
+        expect do
+          subject.send(method, '/test_path')
+        end.to raise_error(SignatureVerification::SignatureVerificationError)
+      end
+    end
+  end
+
+  describe '#get' do
+    include_examples 'a provider request', :get
+  end
+
+  describe '#post' do
+    include_examples 'a provider request', :post
+  end
+
+  describe '#delete' do
+    include_examples 'a provider request', :delete
+  end
+end