1 files changed, 50 insertions, 0 deletions
diff --git a/browser/components/newtab/tests/xpcshell/test_NewTabPrefsProvider.js b/browser/components/newtab/tests/xpcshell/test_NewTabPrefsProvider.js
new file mode 100644
index 000000000..f364d0300
--- /dev/null
+++ b/browser/components/newtab/tests/xpcshell/test_NewTabPrefsProvider.js
@@ -0,0 +1,50 @@
+"use strict";
+
+/* global XPCOMUtils, equal, Preferences, NewTabPrefsProvider, run_next_test */
+/* jscs:disable requireCamelCaseOrUpperCaseIdentifiers */
+
+const Cu = Components.utils;
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Preferences.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "NewTabPrefsProvider",
+    "resource:///modules/NewTabPrefsProvider.jsm");
+
+function run_test() {
+  run_next_test();
+}
+
+add_task(function* test_observe() {
+  let prefsMap = NewTabPrefsProvider.prefs.prefsMap;
+  for (let prefName of prefsMap.keys()) {
+    let prefValueType = prefsMap.get(prefName);
+
+    let beforeVal;
+    let afterVal;
+
+    switch (prefValueType) {
+      case "bool":
+        beforeVal = false;
+        afterVal = true;
+        Preferences.set(prefName, beforeVal);
+        break;
+      case "localized":
+      case "str":
+        beforeVal = "";
+        afterVal = "someStr";
+        Preferences.set(prefName, beforeVal);
+        break;
+    }
+    NewTabPrefsProvider.prefs.init();
+    let promise = new Promise(resolve => {
+      NewTabPrefsProvider.prefs.once(prefName, (name, data) => { // jshint ignore:line
+        resolve([name, data]);
+      });
+    });
+    Preferences.set(prefName, afterVal);
+    let [actualName, actualData] = yield promise;
+    equal(prefName, actualName, `emitter sent the correct pref: ${prefName}`);
+    equal(afterVal, actualData, `emitter collected correct pref data for ${prefName}`);
+    NewTabPrefsProvider.prefs.uninit();
+  }
+});