Test tab listener

index.js

@@ -1,9 +1,9 @@
 var self = require("sdk/self");
 
-// a dummy function, to show how tests work.
-// to see how to test this function, look at test/test-index.js
-function dummy(text, callback) {
-  callback(text);
-}
+require("sdk/tabs").on("ready", getLinks);
  
-exports.dummy = dummy;
+function getLinks(tab) {
+  tab.attach({
+    contentScript: "if (document.body) document.body.style.border = '5px solid red';"
+  });
+}