Add tests

spec/lib/trln_argon/highwire_field_mapping_spec.rb

@@ -0,0 +1,42 @@
+describe TrlnArgon::SolrDocument::HighwireFieldMapping do
+  include described_class
+  class SolrDocumentTestClass
+    include Blacklight::Solr::Document
+    include TrlnArgon::SolrDocument
+  end
+
+  describe '#highwire_metadata_tags' do
+    let(:document1) do
+      SolrDocumentTestClass.new(
+        'title_main' => 'Title',
+        'publisher_a' => 'Publisher',
+        'statement_of_responsibility_a' => [
+          { name: 'Author 1', rel: 'author' },
+          { name: 'Author 2', rel: 'editor' }
+        ]
+      )
+    end
+
+    let(:document2) do
+      SolrDocumentTestClass.new(
+        'title_main' => 'Title',
+        'publisher_a' => 'Publisher'
+      )
+    end
+
+    it 'generates metadata tags based on the mapping' do
+      result = document1.highwire_metadata_tags
+      expect(result).to include(
+        ['citation_title', 'Title'],
+        ['citation_publisher', 'Publisher'],
+        ['citation_author', { 'name' => 'Author 1', 'rel' => 'author' }],
+        ['citation_author', { 'name' => 'Author 2', 'rel' => 'editor' }]
+      )
+    end
+
+    it 'does not include citation_author if there are no authors' do
+      result = document2.highwire_metadata_tags
+      expect(result).not_to include(['citation_author'])
+    end
+  end
+end