Add tests for MaatService

spec/services/maat_service_spec.rb

@@ -0,0 +1,61 @@
+RSpec.describe MaatService do
+  before do
+    allow(Settings).to receive_messages(maat_api_url: 'https://example.com', maat_api_oauth_url: 'https://example.com/oauth')
+    stub_request(:post, 'https://example.com/oauth')
+      .to_return(body: { access_token: 'test_token' }.to_json)
+  end
+
+  describe '.call' do
+    subject { described_class.call(maat_reference:) }
+
+    let(:maat_reference) { '9876543' }
+    let(:connection) { MaatService::Connection.instance }
+
+    context 'with a valid MAAT reference' do
+      before do
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(body: { caseId: 'TEST12345678', crownRepOrderDate: '2024-03-28' }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: 'TEST12345678', representation_order_date: '2024-03-28' }) }
+    end
+
+    context 'with a valid MAAT reference with no date' do
+      before do
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(body: { caseId: 'TEST12345678' }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: 'TEST12345678', representation_order_date: nil }) }
+    end
+
+    context 'with an unknown MAAT reference' do
+      before do
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(status: 404, body: { message: "No Rep Order found for ID: #{maat_reference}" }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: nil, representation_order_date: nil }) }
+    end
+
+    context 'when unauthorized' do
+      before do
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(status: 401, body: { message: 'Unauthorized' }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: nil, representation_order_date: nil }) }
+    end
+
+    context 'when the OAuth settings are not correct' do
+      before do
+        stub_request(:post, 'https://example.com/oauth')
+          .to_return(status: 400, body: { error: 'invalid_client' }.to_json)
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(status: 401, body: { message: 'Unauthorized' }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: nil, representation_order_date: nil }) }
+    end
+  end
+end