1 files changed, 33 insertions, 0 deletions
diff --git a/spec/lib/banzai/filter/inline_observability_filter_spec.rb b/spec/lib/banzai/filter/inline_observability_filter_spec.rb
new file mode 100644
index 00000000000..341ada6d2b5
--- /dev/null
+++ b/spec/lib/banzai/filter/inline_observability_filter_spec.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Banzai::Filter::InlineObservabilityFilter do
+  include FilterSpecHelper
+
+  let(:input) { %(<a href="#{url}">example</a>) }
+  let(:doc) { filter(input) }
+
+  context 'when the document has an external link' do
+    let(:url) { 'https://foo.com' }
+
+    it 'leaves regular non-observability links unchanged' do
+      expect(doc.to_s).to eq(input)
+    end
+  end
+
+  context 'when the document contains an embeddable observability link' do
+    let(:url) { 'https://observe.gitlab.com/12345' }
+
+    it 'leaves the original link unchanged' do
+      expect(doc.at_css('a').to_s).to eq(input)
+    end
+
+    it 'appends a observability charts placeholder' do
+      node = doc.at_css('.js-render-observability')
+
+      expect(node).to be_present
+      expect(node.attribute('data-frame-url').to_s).to eq(url)
+    end
+  end
+end