1 files changed, 22 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_isModuleLoaded.js b/js/xpconnect/tests/unit/test_isModuleLoaded.js
new file mode 100644
index 0000000000..338c283ad8
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_isModuleLoaded.js
@@ -0,0 +1,22 @@
+function run_test() {
+  // Existing module.
+  Assert.ok(Cu.isModuleLoaded("resource://gre/modules/NetUtil.jsm"),
+            "isModuleLoaded returned correct value for non-loaded module");
+  ChromeUtils.import("resource://gre/modules/NetUtil.jsm");
+  Assert.ok(Cu.isModuleLoaded("resource://gre/modules/NetUtil.jsm"),
+            "isModuleLoaded returned true after loading that module");
+  Cu.unload("resource://gre/modules/NetUtil.jsm");
+  Assert.ok(!Cu.isModuleLoaded("resource://gre/modules/NetUtil.jsm"),
+            "isModuleLoaded returned false after unloading that module");
+
+  // Non-existing module
+  Assert.ok(!Cu.isModuleLoaded("resource://gre/modules/non-existing-module.jsm"),
+            "isModuleLoaded returned correct value for non-loaded module");
+  try {
+    ChromeUtils.import("resource://gre/modules/non-existing-module.jsm");
+    Assert.ok(false,
+              "Should have thrown while trying to load a non existing file");
+  } catch (ex) {}
+  Assert.ok(!Cu.isModuleLoaded("resource://gre/modules/non-existing-module.jsm"),
+            "isModuleLoaded returned correct value for non-loaded module");
+}