1 files changed, 14 insertions, 0 deletions
diff --git a/toolkit/components/mozintl/test/test_mozintl.js b/toolkit/components/mozintl/test/test_mozintl.js
index 0eca2c67e..8d2720bf0 100644
--- a/toolkit/components/mozintl/test/test_mozintl.js
+++ b/toolkit/components/mozintl/test/test_mozintl.js
@@ -7,6 +7,7 @@ function run_test() {
 
   test_this_global(mozIntl);
   test_cross_global(mozIntl);
+  test_methods_presence(mozIntl);
 
   ok(true);
 }
@@ -30,3 +31,16 @@ function test_cross_global(mozIntl) {
   equal(waivedX.getCalendarInfo() instanceof Object, false);
   equal(waivedX.getCalendarInfo() instanceof global.Object, true);
 }
+
+function test_methods_presence(mozIntl) {
+  equal(mozIntl.addGetCalendarInfo instanceof Function, true);
+  equal(mozIntl.addGetDisplayNames instanceof Function, true);
+
+  let x = {};
+
+  mozIntl.addGetCalendarInfo(x);
+  equal(x.getCalendarInfo instanceof Function, true);
+
+  mozIntl.addGetDisplayNames(x);
+  equal(x.getDisplayNames instanceof Function, true);
+}