1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/xdr/async.js b/js/src/jit-test/tests/xdr/async.js
new file mode 100644
index 0000000000..2c75c89a98
--- /dev/null
+++ b/js/src/jit-test/tests/xdr/async.js
@@ -0,0 +1,35 @@
+load(libdir + 'bytecode-cache.js');
+
+// Prevent relazification triggered by some zeal modes.
+gczeal(0);
+
+async function f1(a, b) {
+  let x = await 10;
+  return x;
+};
+var toStringResult = f1.toString();
+
+var test = `
+async function f1(a, b) {
+  let x = await 10;
+  return x;
+};
+// toString gets unwrapped function from wrapped function.
+assertEq(f1.toString(), \`${toStringResult}\`);
+
+var ans = 0;
+f1().then(x => { ans = x; });
+drainJobQueue();
+assertEq(ans, 10);
+
+async function f2(a, b) {
+  // arguments.callee gets wrapped function from unwrapped function.
+  return arguments.callee;
+};
+
+f2().then(x => { ans = x; });
+drainJobQueue();
+assertEq(ans, f2);
+`;
+
+evalWithCache(test, { assertEqBytecode: true, checkFrozen: true});