1 files changed, 28 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_callFunctionWithAsyncStack.js b/js/xpconnect/tests/unit/test_callFunctionWithAsyncStack.js
new file mode 100644
index 0000000000..75c3fa013e
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_callFunctionWithAsyncStack.js
@@ -0,0 +1,28 @@
+function run_test() {
+  if (!Services.prefs.getBoolPref("javascript.options.asyncstack")) {
+    info("Async stacks are disabled.");
+    return;
+  }
+
+  function getAsyncStack() {
+    return Components.stack;
+  }
+
+  // asyncCause may contain non-ASCII characters.
+  let testAsyncCause = "Tes" + String.fromCharCode(355) + "String";
+
+  Cu.callFunctionWithAsyncStack(function asyncCallback() {
+    let stack = Components.stack;
+
+    Assert.equal(stack.name, "asyncCallback");
+    Assert.equal(stack.caller, null);
+    Assert.equal(stack.asyncCause, null);
+
+    Assert.equal(stack.asyncCaller.name, "getAsyncStack");
+    Assert.equal(stack.asyncCaller.asyncCause, testAsyncCause);
+    Assert.equal(stack.asyncCaller.asyncCaller, null);
+
+    Assert.equal(stack.asyncCaller.caller.name, "run_test");
+    Assert.equal(stack.asyncCaller.caller.asyncCause, null);
+  }, getAsyncStack(), testAsyncCause);
+}