1 files changed, 19 insertions, 0 deletions
diff --git a/spec/lib/banzai/filter/html_entity_filter_spec.rb b/spec/lib/banzai/filter/html_entity_filter_spec.rb
new file mode 100644
index 00000000000..f9e6bd609f0
--- /dev/null
+++ b/spec/lib/banzai/filter/html_entity_filter_spec.rb
@@ -0,0 +1,19 @@
+require 'spec_helper'
+
+describe Banzai::Filter::HtmlEntityFilter, lib: true do
+  include FilterSpecHelper
+
+  let(:unescaped) { 'foo <strike attr="foo">&&&</strike>' }
+  let(:escaped) { 'foo &lt;strike attr=&quot;foo&quot;&gt;&amp;&amp;&amp;&lt;/strike&gt;' }
+
+  it 'converts common entities to their HTML-escaped equivalents' do
+    output = filter(unescaped)
+
+    expect(output).to eq(escaped)
+  end
+
+  it 'does not double-escape' do
+    escaped = ERB::Util.html_escape("Merge branch 'blabla' into 'master'")
+    expect(filter(escaped)).to eq(escaped)
+  end
+end