1 files changed, 34 insertions, 0 deletions
diff --git a/spec/lib/banzai/filter/task_list_filter_spec.rb b/spec/lib/banzai/filter/task_list_filter_spec.rb
index c89acd1a643..920904b0f29 100644
--- a/spec/lib/banzai/filter/task_list_filter_spec.rb
+++ b/spec/lib/banzai/filter/task_list_filter_spec.rb
@@ -10,4 +10,38 @@ RSpec.describe Banzai::Filter::TaskListFilter do
 
     expect(doc.xpath('.//li//task-button').count).to eq(2)
   end
+
+  describe 'inapplicable list items' do
+    shared_examples 'a valid inapplicable task list item' do |html|
+      it "behaves correctly for `#{html}`" do
+        doc = filter("<ul><li>#{html}</li></ul>")
+
+        expect(doc.css('li.inapplicable input[data-inapplicable]').count).to eq(1)
+        expect(doc.css('li.inapplicable > s').count).to eq(1)
+      end
+    end
+
+    shared_examples 'an invalid inapplicable task list item' do |html|
+      it "does nothing for `#{html}`" do
+        doc = filter("<ul><li>#{html}</li></ul>")
+
+        expect(doc.css('li.inapplicable input[data-inapplicable]').count).to eq(0)
+      end
+    end
+
+    it_behaves_like 'a valid inapplicable task list item', '[~] foobar'
+    it_behaves_like 'a valid inapplicable task list item', '[~] foo <em>bar</em>'
+    it_behaves_like 'an invalid inapplicable task list item', '[ ] foobar'
+    it_behaves_like 'an invalid inapplicable task list item', '[x] foobar'
+    it_behaves_like 'an invalid inapplicable task list item', 'foo [~] bar'
+
+    it 'does not wrap a sublist with <s>' do
+      html = '[~] foo <em>bar</em>\n<ol><li>sublist</li></ol>'
+      doc = filter("<ul><li>#{html}</li></ul>")
+
+      expect(doc.to_html).to include('<s>foo <em>bar</em>\n</s>')
+      expect(doc.css('li.inapplicable input[data-inapplicable]').count).to eq(1)
+      expect(doc.css('li.inapplicable > s').count).to eq(1)
+    end
+  end
 end