1 files changed, 31 insertions, 7 deletions
diff --git a/spec/lib/banzai/filter/table_of_contents_tag_filter_spec.rb b/spec/lib/banzai/filter/table_of_contents_tag_filter_spec.rb
index 56f36af5066..082e5c92e53 100644
--- a/spec/lib/banzai/filter/table_of_contents_tag_filter_spec.rb
+++ b/spec/lib/banzai/filter/table_of_contents_tag_filter_spec.rb
@@ -6,18 +6,42 @@ RSpec.describe Banzai::Filter::TableOfContentsTagFilter do
   include FilterSpecHelper
 
   context 'table of contents' do
-    let(:html) { '<p>[[<em>TOC</em>]]</p>' }
+    shared_examples 'table of contents tag' do
+      it 'replaces toc tag with ToC result' do
+        doc = filter(html, {}, { toc: "FOO" })
 
-    it 'replaces [[<em>TOC</em>]] with ToC result' do
-      doc = filter(html, {}, { toc: "FOO" })
+        expect(doc.to_html).to eq("FOO")
+      end
 
-      expect(doc.to_html).to eq("FOO")
+      it 'handles an empty ToC result' do
+        doc = filter(html)
+
+        expect(doc.to_html).to eq ''
+      end
+    end
+
+    context '[[_TOC_]] as tag' do
+      it_behaves_like 'table of contents tag' do
+        let(:html) { '<p>[[<em>TOC</em>]]</p>' }
+      end
     end
 
-    it 'handles an empty ToC result' do
-      doc = filter(html)
+    context '[[_toc_]] as tag' do
+      it_behaves_like 'table of contents tag' do
+        let(:html) { '<p>[[<em>toc</em>]]</p>' }
+      end
+    end
+
+    context '[TOC] as tag' do
+      it_behaves_like 'table of contents tag' do
+        let(:html) { '<p>[TOC]</p>' }
+      end
+    end
 
-      expect(doc.to_html).to eq ''
+    context '[toc] as tag' do
+      it_behaves_like 'table of contents tag' do
+        let(:html) { '<p>[toc]</p>' }
+      end
     end
   end
 end