+ r = RichText.new("markdown", "foo <a rel='junk me trash' href='http://example.com/'>bar</a>) baz")
+ assert_html r do
+ assert_select "a", 1
+ assert_select "a[href='http://example.com/']", 1
+ assert_select "a[rel='me nofollow noopener noreferrer']", 1
+ end
+