1 files changed, 29 insertions, 0 deletions
diff --git a/spec/lib/banzai/filter/external_link_filter_spec.rb b/spec/lib/banzai/filter/external_link_filter_spec.rb
new file mode 100644
index 00000000000..e3a8e15330e
--- /dev/null
+++ b/spec/lib/banzai/filter/external_link_filter_spec.rb
@@ -0,0 +1,29 @@
+require 'spec_helper'
+
+describe Banzai::Filter::ExternalLinkFilter, lib: true do
+  include FilterSpecHelper
+
+  it 'ignores elements without an href attribute' do
+    exp = act = %q(<a id="ignored">Ignore Me</a>)
+    expect(filter(act).to_html).to eq exp
+  end
+
+  it 'ignores non-HTTP(S) links' do
+    exp = act = %q(<a href="irc://irc.freenode.net/gitlab">IRC</a>)
+    expect(filter(act).to_html).to eq exp
+  end
+
+  it 'skips internal links' do
+    internal = Gitlab.config.gitlab.url
+    exp = act = %Q(<a href="#{internal}/sign_in">Login</a>)
+    expect(filter(act).to_html).to eq exp
+  end
+
+  it 'adds rel="nofollow" to external links' do
+    act = %q(<a href="https://google.com/">Google</a>)
+    doc = filter(act)
+
+    expect(doc.at_css('a')).to have_attribute('rel')
+    expect(doc.at_css('a')['rel']).to eq 'nofollow'
+  end
+end