1 files changed, 73 insertions, 0 deletions
diff --git a/js/src/tests/test262/harness/asyncHelpers-throwsAsync-custom-typeerror.js b/js/src/tests/test262/harness/asyncHelpers-throwsAsync-custom-typeerror.js
new file mode 100644
index 0000000000..9cc1b95953
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+++ b/js/src/tests/test262/harness/asyncHelpers-throwsAsync-custom-typeerror.js
@@ -0,0 +1,73 @@
+// |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: |
+    Thenables that reject with instances of the specified constructor function
+    satisfy the assertion, without collision with error constructors of the same name.
+flags: [async]
+includes: [asyncHelpers.js]
+---*/
+
+var intrinsicTypeError = TypeError;
+
+asyncTest(async function () {
+  function TypeError() {}
+  var caught = false;
+
+  var p = assert.throwsAsync(
+    TypeError,
+    async function () {
+      throw new TypeError();
+    },
+    "Throws an instance of the matching custom TypeError"
+  );
+  assert(p instanceof Promise);
+  await p;
+
+  p = assert.throwsAsync(intrinsicTypeError, async function () {
+    throw new TypeError();
+  });
+  assert(p instanceof Promise);
+  try {
+    await p;
+  } catch (err) {
+    caught = true;
+    assert.sameValue(
+      err.constructor,
+      Test262Error,
+      "Expected a Test262Error, but a '" +
+        err.constructor.name +
+        "' was thrown."
+    );
+  } finally {
+    assert(
+      caught,
+      "assert.throwsAsync did not reject a collision of constructor names"
+    );
+  }
+
+  caught = false;
+
+  p = assert.throwsAsync(TypeError, async function () {
+    throw new intrinsicTypeError();
+  });
+  assert(p instanceof Promise);
+  try {
+    await p;
+  } catch (err) {
+    caught = true;
+    assert.sameValue(
+      err.constructor,
+      Test262Error,
+      "Expected a Test262Error, but a '" +
+        err.constructor.name +
+        "' was thrown."
+    );
+  } finally {
+    assert(
+      caught,
+      "assert.throwsAsync did not reject a collision of constructor names"
+    );
+  }
+})