1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/tests/test262/harness/asyncHelpers-throwsAsync-func-throws-sync.js b/js/src/tests/test262/harness/asyncHelpers-throwsAsync-func-throws-sync.js
new file mode 100644
index 0000000000..a7802e2e8e
--- /dev/null
+++ b/js/src/tests/test262/harness/asyncHelpers-throwsAsync-func-throws-sync.js
@@ -0,0 +1,53 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    assert.throwsAsync returns a promise that rejects if func or the inner thenable synchronously throws.
+flags: [async]
+includes: [asyncHelpers.js]
+---*/
+
+async function checkRejects(func) {
+  var caught = false;
+  const p = assert.throwsAsync(Test262Error, func);
+  assert(p instanceof Promise, "assert.throwsAsync should return a promise");
+  try {
+    await p;
+  } catch (e) {
+    caught = true;
+    assert.sameValue(
+      e.constructor,
+      Test262Error,
+      "throwsAsync should reject improper function with a Test262Error"
+    );
+  } finally {
+    assert(
+      caught,
+      "assert.throwsAsync did not reject improper function " + func
+    );
+  }
+}
+
+asyncTest(async function () {
+  await checkRejects(function () {
+    throw new Error();
+  });
+  await checkRejects(function () {
+    throw new Test262Error();
+  });
+  await checkRejects(function () {
+    return {
+      then: function () {
+        throw new Error();
+      },
+    };
+  });
+  await checkRejects(function () {
+    return {
+      then: function () {
+        throw new Test262Error();
+      },
+    };
+  });
+});