1 files changed, 70 insertions, 0 deletions
diff --git a/modules/libpref/test/unit/test_extprefs.js b/modules/libpref/test/unit/test_extprefs.js
new file mode 100644
index 000000000..37f8de167
--- /dev/null
+++ b/modules/libpref/test/unit/test_extprefs.js
@@ -0,0 +1,70 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/  */
+
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/Services.jsm");
+
+// The profile directory is already set up in the head_ files.
+
+function arrayenumerator(a)
+{
+  return {
+    i_: 0,
+    QueryInterface: XPCOMUtils.generateQI([Ci.nsISimpleEnumerator]),
+    hasMoreElements: function ae_hasMoreElements() {
+      return this.i_ < a.length;
+    },
+    getNext: function ae_getNext() {
+      return a[this.i_++];
+    }
+  };
+}
+
+function run_test() {
+  var ps = Cc["@mozilla.org/preferences-service;1"].
+    getService(Ci.nsIPrefService).QueryInterface(Ci.nsIPrefBranch);
+
+  var extprefs = [do_get_file("extdata")];
+  
+  var extProvider = {
+    QueryInterface: XPCOMUtils.generateQI([Ci.nsIDirectoryServiceProvider,
+                                           Ci.nsIDirectoryServiceProvider2]),
+    getFile: function ep_getFile() {
+      throw Cr.NS_ERROR_FAILURE;
+    },
+    
+    getFiles: function ep_getFiles(key) {
+      if (key != "ExtPrefDL")
+        throw Cr.NS_ERROR_FAILURE;
+
+      return arrayenumerator(extprefs);
+    }
+  };
+  
+  let prefFile = do_get_file("data/testPref.js");
+
+  do_check_throws(function() {
+    ps.getBoolPref("testExtPref.bool");
+  }, Cr.NS_ERROR_UNEXPECTED);
+  do_check_throws(function() {
+    ps.getBoolPref("testPref.bool1");
+  }, Cr.NS_ERROR_UNEXPECTED);
+  
+  ps.readUserPrefs(prefFile);
+
+  do_check_true(ps.getBoolPref("testPref.bool1"));
+  ps.setBoolPref("testPref.bool1", false);
+  do_check_false(ps.getBoolPref("testPref.bool1"));
+  
+  dirSvc.registerProvider(extProvider);
+  Services.obs.notifyObservers(null, "load-extension-defaults", null);
+
+  // The extension default should be available.
+  do_check_true(ps.getBoolPref("testExtPref.bool"));
+
+  // The extension default should not override existing user prefs
+  do_check_false(ps.getBoolPref("testPref.bool2"));
+
+  // The extension default should not modify existing set values
+  do_check_false(ps.getBoolPref("testPref.bool1"));
+}