1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Atomics/waitAsync/bigint/value-not-equal.js b/js/src/tests/test262/built-ins/Atomics/waitAsync/bigint/value-not-equal.js
new file mode 100644
index 0000000000..adc2bc69a2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Atomics/waitAsync/bigint/value-not-equal.js
@@ -0,0 +1,44 @@
+// |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: >
+  Returns "not-equal" when value arg does not match an index in the typedArray
+info: |
+  Atomics.waitAsync( typedArray, index, value, timeout )
+
+  1. Return DoWait(async, typedArray, index, value, timeout).
+
+  DoWait ( mode, typedArray, index, value, timeout )
+
+  16. Let w be ! AtomicLoad(typedArray, i).
+  17. If v is not equal to w, then
+    a. Perform LeaveCriticalSection(WL).
+    b. If mode is sync, then
+      i. Return the String "not-equal".
+    c. Perform ! Call(capability.[[Resolve]], undefined, « "not-equal" »).
+    d. Return promiseCapability.[[Promise]].
+
+flags: [async]
+features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, BigInt, computed-property-names, Symbol, Symbol.toPrimitive, Atomics, arrow-function]
+---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"');
+const i64a = new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4));
+
+const valueOf = {
+  valueOf() {
+    return undefined;
+  }
+};
+
+const toPrimitive = {
+  [Symbol.toPrimitive]() {
+    return undefined;
+  }
+};
+
+Promise.all([Atomics.store(i64a, 0, 42n), Atomics.waitAsync(i64a, 0, 0n).value]).then(outcomes => {
+  assert.sameValue(outcomes[0], 42n, 'The value of outcomes[0] is 42n');
+  assert.sameValue(outcomes[1], 'not-equal', 'The value of outcomes[1] is "not-equal"');
+}).then($DONE, $DONE);