add spec for rights_statement_helper

app/helpers/rights_statement_helper.rb

@@ -3,7 +3,7 @@ module RightsStatementHelper
   # @param uri [String] uri of the rights statement
   # @param label [String] label for the statement
   # @return [String]
-  def rights_statement_icon(uri, label)
+  def rights_statement_icon(uri, label = '')
     label = uri if label.blank?
     image_path = rs_icon_path_for(uri)
     link_content =

spec/helpers/rights_statement_helper_spec.rb

@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+RSpec.describe RightsStatementHelper do
+  describe '#rights_statement_icon_path_for' do
+    subject(:node) { Capybara::Node::Simple.new(icon) }
+
+    let(:rights_service) { Hyrax.config.rights_statement_service_class.new }
+    let(:icon) { helper.rights_statement_icon(uri, label) }
+
+    shared_examples 'an icon link for the rights_statement' do
+      let(:image) { helper.image_path("rights-icons/#{key}.svg") }
+
+      it { is_expected.to have_css 'a img' }
+      it { is_expected.to have_link(nil, href: uri) }
+
+      it "uses the label as the image's alt-text" do
+        expect(node.find('img')['alt']).to eq label
+      end
+
+      it 'opens the link in a new window' do
+        expect(node.find('a')['target']).to eq '_blank'
+      end
+    end
+
+    {
+      'http://creativecommons.org/licenses/by/3.0/us/' => 'cc-by',
+      'http://creativecommons.org/licenses/by-sa/3.0/us/' => 'cc-by-sa',
+      'http://creativecommons.org/licenses/by-nc/3.0/us/' => 'cc-by-nc',
+      'http://creativecommons.org/licenses/by-nd/3.0/us/' => 'cc-by-nd',
+      'http://creativecommons.org/licenses/by-nc-nd/3.0/us/' => 'cc-by-nc-nd',
+      'http://creativecommons.org/licenses/by-nc-sa/3.0/us/' => 'cc-by-nc-sa',
+      'http://rightsstatements.org/vocab/InC-NC/1.0/' => 'rs-inc-nc',
+      'http://rightsstatements.org/vocab/InC-RUU/1.0/' => 'rs-inc-ruu',
+      'http://rightsstatements.org/vocab/NoC-CR/1.0/' => 'rs-noc-cr',
+      'http://rightsstatements.org/vocab/NoC-US/1.0/' => 'rs-noc-us',
+      'http://rightsstatements.org/vocab/UND/1.0/' => 'rs-und',
+      'http://rightsstatements.org/vocab/NKC/1.0/' => 'rs-nkc',
+      'http://creativecommons.org/publicdomain/zero/1.0/' => 'pd-zero',
+      'http://creativecommons.org/publicdomain/mark/1.0/' => 'pd-mark'
+    }.each_pair do |license, svg_key|
+      context license do
+        let(:uri) { license }
+        let(:label) { rights_service.label(uri) }
+        let(:key) { svg_key }
+
+        it_behaves_like 'an icon link for the rights_statement'
+      end
+    end
+
+    context 'when a URI is not expected' do
+      let(:uri) { 'http://lafayette.edu' }
+      let(:label) { nil }
+
+      it { is_expected.not_to have_css 'a img' }
+      it { is_expected.to have_css 'a span.fa.fa-external-link' }
+      it { is_expected.to have_link(uri, href: uri) }
+    end
+  end
+end