1468: Fix map nil error (#27414)

Author: balexandr

lib/disability_compensation/providers/rated_disabilities/lighthouse_rated_disabilities_provider.rb

@@ -27,7 +27,7 @@ def get_combined_disability_rating(lighthouse_client_id = nil, lighthouse_rsa_ke
   # @option options [string] :invoker where this method was called from
   def get_rated_disabilities(lighthouse_client_id = nil, lighthouse_rsa_key_path = nil, options = {})
     data = get_data(lighthouse_client_id, lighthouse_rsa_key_path, options)
-    transform(data['data']['attributes']['individual_ratings'])
+    transform(data.dig('data', 'attributes', 'individual_ratings') || [])
   end
 
   # @param [string] lighthouse_client_id: the lighthouse_client_id requested from Lighthouse

spec/lib/disability_compensation/providers/rated_disabilities/lighthouse_rated_disabilities_provider_spec.rb

@@ -26,6 +26,14 @@
     end
   end
 
+  it 'returns an empty list when individual_ratings is nil' do
+    allow_any_instance_of(VeteranVerification::Service).to receive(:get_rated_disabilities).and_return(
+      { 'data' => { 'attributes' => { 'individual_ratings' => nil } } }
+    )
+    response = @provider.get_rated_disabilities('', '')
+    expect(response.rated_disabilities).to eq([])
+  end
+
   it 'returns the proper error through the Timeout class' do
     allow_any_instance_of(Faraday::Connection).to receive(:get).and_raise(Faraday::TimeoutError)
     expect do