Ensure support for all metadata attributes

In the authoring document, we are specifying what kind of attributes
we do support in the metanorma. This commit adds some example cases
to ensure we do support all of these cases.

Link: https://www.metanorma.org/author/topics/metadata/

spec/coradoc/document/attribute_spec.rb

@@ -11,5 +11,15 @@
       expect(attribute.key).to eq(key)
       expect(attribute.value).to eq(value)
     end
+
+    it "exposes comma separated values as an array" do
+      key = "comma-separted-values"
+      value = "html,pdf,xml, adoc"
+
+      attribute = Coradoc::Document::Attribute.new(key, value)
+
+      expect(attribute.key).to eq(key)
+      expect(attribute.value).to eq(value.split(",").map(&:strip))
+    end
   end
 end

spec/coradoc/parser/asciidoc/bibdata_spec.rb

@@ -9,19 +9,27 @@
         :version: '1.0'
         :oscal-version: 1.0.0
         :remarks: OSCAL from ISO27002:2022
+        :mn-output-extensions: xml,html,doc,html_alt
+        :title-main-fr: Spécification et méthodes d'essai
       DOC
 
-      ast = Asciidoc::BibdataTester.parse(bibdata)
+      ast = Asciidoc::BibdataTester.parse(bibdata).first
 
-      expect(ast.first[:bibdata].count).to eq(5)
-      expect(ast.first[:bibdata][0][:key]).to eq("published")
-      expect(ast.first[:bibdata][0][:value]).to eq("'2023-03-08T09:51:08+08:00'")
+      expect(ast[:bibdata].count).to eq(7)
+      expect(ast[:bibdata][0][:key]).to eq("published")
+      expect(ast[:bibdata][0][:value]).to eq("'2023-03-08T09:51:08+08:00'")
 
-      expect(ast.first[:bibdata][2][:key]).to eq("version")
-      expect(ast.first[:bibdata][2][:value]).to eq("'1.0'")
+      expect(ast[:bibdata][2][:key]).to eq("version")
+      expect(ast[:bibdata][2][:value]).to eq("'1.0'")
 
-      expect(ast.first[:bibdata][4][:key]).to eq("remarks")
-      expect(ast.first[:bibdata][4][:value]).to eq("OSCAL from ISO27002:2022")
+      expect(ast[:bibdata][4][:key]).to eq("remarks")
+      expect(ast[:bibdata][4][:value]).to eq("OSCAL from ISO27002:2022")
+
+      expect(ast[:bibdata][5][:key]).to eq("mn-output-extensions")
+      expect(ast[:bibdata][5][:value]).to eq("xml,html,doc,html_alt")
+
+      expect(ast[:bibdata][6][:key]).to eq("title-main-fr")
+      expect(ast[:bibdata][6][:value]).to eq("Spécification et méthodes d'essai")
     end
 
   end