+
+ html = format_value("wikipedia", "Test")
+ assert_dom_equal "<a title=\"The Test article on Wikipedia\" href=\"http://en.wikipedia.org/wiki/Test?uselang=en\">Test</a>", html
+
+ html = format_value("wikidata", "Q42")
+ assert_dom_equal "<a title=\"The Q42 item on Wikidata\" href=\"//www.wikidata.org/wiki/Q42?uselang=en\">Q42</a>", html