Support both Fedora and Premis fixity predicates

lib/active_fedora/fixity_service.rb

@@ -11,26 +11,35 @@ def initialize target
     end
 
     # Executes a fixity check on Fedora and saves the Faraday::Response.
-    # Returns true when the fixity check was successfully.
+    # @return true or false
     def check
       @response = get_fixity_response_from_fedora
-      status.match("SUCCESS") ? true : false
+      status.include?(success)
     end
 
     def status
-      fixity_graph.query(predicate: status_predicate).map(&:object).first.to_s
+      fixity_graph.query(predicate: premis_status_predicate).map(&:object) +
+        fixity_graph.query(predicate: fedora_status_predicate).map(&:object)
     end
 
     private
 
+      def premis_status_predicate
+        ::RDF::Vocab::PREMIS.hasEventOutcome
+      end
+
       # Fcrepo4.status was used by Fedora < 4.3, but it was removed
       # from the 2015-07-24 version of the fedora 4 ontology
       # http://fedora.info/definitions/v4/2015/07/24/repository and
       # from rdf-vocab in version 0.8.5
-      def status_predicate
+      def fedora_status_predicate
         ::RDF::URI("http://fedora.info/definitions/v4/repository#status")
       end
 
+      def success
+        ::RDF::Literal.new("SUCCESS")
+      end
+
       def get_fixity_response_from_fedora
         uri = target + "/fcr:fixity"
         ActiveFedora.fedora.connection.get(encoded_url(uri))

spec/unit/fixity_service_spec.rb

@@ -24,20 +24,44 @@
   end
 
   describe "#check" do
-    before do
-      allow(service).to receive(:get_fixity_response_from_fedora).and_return(response)
-    end
+    before { allow(service).to receive(:get_fixity_response_from_fedora).and_return(response) }
     subject { service.check }
-    context "with a passing result" do
-      let(:response) do
-        instance_double("Response", body: '<subject> <http://fedora.info/definitions/v4/repository#status> "SUCCESS"^^<http://www.w3.org/2001/XMLSchema#string> .')
+
+    context "with Fedora version >= 4.4.0" do
+      context "with a passing result" do
+        let(:response) do
+          instance_double("Response", body: '<subject> <http://www.loc.gov/premis/rdf/v1#hasEventOutcome> "SUCCESS"^^<http://www.w3.org/2001/XMLSchema#string> .')
+        end
+        it { is_expected.to be true }
+      end
+
+      context "with a failing result" do
+        let(:response) do
+          instance_double("Response", body: '<subject> <http://www.loc.gov/premis/rdf/v1#hasEventOutcome> "BAD_CHECKSUM"^^<http://www.w3.org/2001/XMLSchema#string> .')
+        end
+        it { is_expected.to be false }
+      end
+    end
+
+    context "with Fedora version < 4.4.0" do
+      context "with a passing result" do
+        let(:response) do
+          instance_double("Response", body: '<subject> <http://fedora.info/definitions/v4/repository#status> "SUCCESS"^^<http://www.w3.org/2001/XMLSchema#string> .')
+        end
+        it { is_expected.to be true }
+      end
+
+      context "with a failing result" do
+        let(:response) do
+          instance_double("Response", body: '<subject> <http://fedora.info/definitions/v4/repository#status> "BAD_CHECKSUM"^^<http://www.w3.org/2001/XMLSchema#string> .')
+        end
+        it { is_expected.to be false }
       end
-      it { is_expected.to be true }
     end
 
-    context "with a failing result" do
+    context "with a non-existent predicate" do
       let(:response) do
-        instance_double("Response", body: '<subject> <http://fedora.info/definitions/v4/repository#status> "BAD_CHECKSUM"^^<http://www.w3.org/2001/XMLSchema#string> .')
+        instance_double("Response", body: '<subject> <http://bogus.com/definitions/v1/bogusTerm#foo> "SUCCESS"^^<http://www.w3.org/2001/XMLSchema#string> .')
       end
       it { is_expected.to be false }
     end