1 files changed, 71 insertions, 0 deletions
diff --git a/js/src/tests/test262/harness/asyncHelpers-throwsAsync-invalid-func.js b/js/src/tests/test262/harness/asyncHelpers-throwsAsync-invalid-func.js
new file mode 100644
index 0000000000..9ada348f80
--- /dev/null
+++ b/js/src/tests/test262/harness/asyncHelpers-throwsAsync-invalid-func.js
@@ -0,0 +1,71 @@
+// |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 calls $DONE with a rejecting value if func is not a function returning a thenable.
+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(null);
+  await checkRejects({});
+  await checkRejects("string");
+  await checkRejects(10);
+  await checkRejects();
+  await checkRejects({
+    then: function (res, rej) {
+      res(true);
+    },
+  });
+  await checkRejects(function () {
+    return null;
+  });
+  await checkRejects(function () {
+    return {};
+  });
+  await checkRejects(function () {
+    return "string";
+  });
+  await checkRejects(function () {
+    return 10;
+  });
+  await checkRejects(function () {});
+  await checkRejects(function () {
+    return { then: null };
+  });
+  await checkRejects(function () {
+    return { then: {} };
+  });
+  await checkRejects(function () {
+    return { then: "string" };
+  });
+  await checkRejects(function () {
+    return { then: 10 };
+  });
+  await checkRejects(function () {
+    return { then: undefined };
+  });
+});