Bug 591816 - Add tests for TabEngine [r=mconnor]

services/sync/tests/unit/test_tab_engine.js

@@ -0,0 +1,47 @@
+Cu.import("resource://services-sync/engines/tabs.js");
+Cu.import("resource://services-sync/util.js");
+
+function fakeSessionSvc() {
+  let tabs = [];
+  for(let i = 0; i < arguments.length; i++) {
+    tabs.push({
+      index: 1,
+      entries: [{
+        url: arguments[i],
+        title: "title"
+      }],
+      attributes: {
+        image: "image"
+      },
+      extData: {
+        weaveLastUsed: 1
+      }
+    });
+  }
+  let obj = {windows: [{tabs: tabs}]};
+
+  // delete the getter, or the previously created fake Session
+  delete Svc.Session;
+  Svc.Session = {
+    getBrowserState: function() JSON.stringify(obj)
+  };
+}
+
+function run_test() {
+
+  _("test locallyOpenTabMatchesURL");
+  let engine = new TabEngine();
+
+  // 3 tabs
+  fakeSessionSvc("http://bar.com", "http://foo.com", "http://foobar.com");
+
+  let matches;
+ 
+  _("  test matching works (true)");
+  matches = engine.locallyOpenTabMatchesURL("http://foo.com");
+  do_check_true(matches);
+
+  _("  test matching works (false)");
+  matches = engine.locallyOpenTabMatchesURL("http://barfoo.com");
+  do_check_false(matches);
+}