feat: add matched provider to flag metadata in MetaProvider

.gitignore

@@ -54,3 +54,5 @@ build-iPhoneSimulator/
 
 # Used by RuboCop. Remote config files pulled in from inherit_from directive.
 # .rubocop-https?--*
+
+.DS_Store

providers/openfeature-meta_provider/lib/openfeature/meta_provider.rb

@@ -57,6 +57,15 @@ def fetch_from_sources(default_value:, &blk)
         successful_details = providers.each do |provider|
           details = yield(provider)
 
+          details = SDK::Provider::ResolutionDetails.new(
+            value: details.value,
+            reason: details.reason,
+            variant: details.variant,
+            error_code: details.error_code,
+            error_message: details.error_message,
+            flag_metadata: (details.flag_metadata || {}).merge("matched_provider" => provider.metadata.name)
+          )
+
           break details if details.error_code.nil?
         rescue
           next

providers/openfeature-meta_provider/spec/openfeature/meta_provider_spec.rb

@@ -8,19 +8,31 @@
       let(:flag_key) { "first_match_#{type}" }
 
       it "returns from first" do
+        expected_result = OpenFeature::SDK::Provider::ResolutionDetails.new(
+          value: first_matched_value,
+          reason: OpenFeature::SDK::Provider::Reason::STATIC,
+          flag_metadata: {"matched_provider" => "In-memory Provider"}
+        )
+
         result = meta_provider.send(:"fetch_#{type}_value", flag_key:, default_value:)
 
-        expect(result).to eq(OpenFeature::SDK::Provider::ResolutionDetails.new(value: first_matched_value, reason: OpenFeature::SDK::Provider::Reason::STATIC))
+        expect(result).to eq(expected_result)
       end
     end
 
     context "and second provider matches" do
       let(:flag_key) { "second_match_#{type}" }
 
       it "returns from second" do
+        expected_result = OpenFeature::SDK::Provider::ResolutionDetails.new(
+          value: second_matched_value,
+          reason: OpenFeature::SDK::Provider::Reason::STATIC,
+          flag_metadata: {"matched_provider" => "In-memory Provider"}
+        )
+
         result = meta_provider.send(:"fetch_#{type}_value", flag_key:, default_value:)
 
-        expect(result).to eq(OpenFeature::SDK::Provider::ResolutionDetails.new(value: second_matched_value, reason: OpenFeature::SDK::Provider::Reason::STATIC))
+        expect(result).to eq(expected_result)
       end
     end