1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Atomics/waitAsync/negative-timeout.js b/js/src/tests/test262/built-ins/Atomics/waitAsync/negative-timeout.js
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index 0000000000..f2d611acee
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+++ b/js/src/tests/test262/built-ins/Atomics/waitAsync/negative-timeout.js
@@ -0,0 +1,34 @@
+// |reftest| skip async -- Atomics.waitAsync is not supported
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-atomics.waitasync
+description: >
+  Test that Atomics.waitAsync times out with a negative timeout
+info: |
+  Atomics.waitAsync( typedArray, index, value, timeout )
+
+  1. Return DoWait(async, typedArray, index, value, timeout).
+
+  DoWait ( mode, typedArray, index, value, timeout )
+
+  6. Let q be ? ToNumber(timeout).
+
+flags: [async]
+features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics, destructuring-binding, arrow-function]
+---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"');
+const i32a = new Int32Array(
+  new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
+);
+
+Promise.all([
+    Atomics.waitAsync(i32a, 0, 0, -1).value,
+  ]).then(([outcome]) => {
+    assert.sameValue(
+      outcome,
+      'timed-out',
+      'The value of `outcome` is "timed-out"'
+    );
+  }).then($DONE, $DONE);