1 files changed, 67 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Atomics/waitAsync/value-not-equal-agent.js b/js/src/tests/test262/built-ins/Atomics/waitAsync/value-not-equal-agent.js
new file mode 100644
index 0000000000..852162a856
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Atomics/waitAsync/value-not-equal-agent.js
@@ -0,0 +1,67 @@
+// |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]
+includes: [atomicsHelper.js]
+features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics, arrow-function, async-functions]
+---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"');
+
+const RUNNING = 1;
+const value = 42;
+
+$262.agent.start(`
+  $262.agent.receiveBroadcast(function(sab) {
+    const i32a = new Int32Array(sab);
+    Atomics.add(i32a, ${RUNNING}, 1);
+
+    $262.agent.report(Atomics.store(i32a, 0, ${value}));
+    $262.agent.report(Atomics.waitAsync(i32a, 0, 0).value);
+    $262.agent.leaving();
+  });
+`);
+
+const i32a = new Int32Array(
+  new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
+);
+
+$262.agent.safeBroadcastAsync(i32a, RUNNING, 1).then(async (agentCount) => {
+
+  assert.sameValue(agentCount, 1, 'The value of `agentCount` is 1');
+
+  assert.sameValue(
+    await $262.agent.getReportAsync(),
+    '42',
+    '(await $262.agent.getReportAsync()) resolves to the value "42"'
+  );
+  assert.sameValue(
+    await $262.agent.getReportAsync(),
+    'not-equal',
+    '(await $262.agent.getReportAsync()) resolves to the value "not-equal"'
+  );
+  assert.sameValue(
+    Atomics.notify(i32a, 0, 1),
+    0,
+    'Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)), 0, 1) must return 0'
+  );
+}).then($DONE, $DONE);