1 files changed, 37 insertions, 0 deletions
diff --git a/modules/libpref/test/unit/head_libPrefs.js b/modules/libpref/test/unit/head_libPrefs.js
new file mode 100644
index 0000000000..ef7044a641
--- /dev/null
+++ b/modules/libpref/test/unit/head_libPrefs.js
@@ -0,0 +1,37 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const NS_APP_USER_PROFILE_50_DIR = "ProfD";
+
+function do_check_throws(f, result, stack) {
+  if (!stack) {
+    stack = Components.stack.caller;
+  }
+
+  try {
+    f();
+  } catch (exc) {
+    equal(exc.result, result, "Correct exception was thrown");
+    return;
+  }
+  ok(false, "expected result " + result + ", none thrown");
+}
+
+// Register current test directory as provider for the profile directory.
+var provider = {
+  getFile(prop, persistent) {
+    persistent.value = true;
+    if (prop == NS_APP_USER_PROFILE_50_DIR) {
+      return Services.dirsvc.get("CurProcD", Ci.nsIFile);
+    }
+    throw Components.Exception(
+      "Tried to get test directory '" + prop + "'",
+      Cr.NS_ERROR_FAILURE
+    );
+  },
+  QueryInterface: ChromeUtils.generateQI(["nsIDirectoryServiceProvider"]),
+};
+Services.dirsvc
+  .QueryInterface(Ci.nsIDirectoryService)
+  .registerProvider(provider);