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-rw-r--r--js/src/tests/test262/built-ins/Atomics/waitAsync/undefined-index-defaults-to-zero-agent.js79
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diff --git a/js/src/tests/test262/built-ins/Atomics/waitAsync/undefined-index-defaults-to-zero-agent.js b/js/src/tests/test262/built-ins/Atomics/waitAsync/undefined-index-defaults-to-zero-agent.js
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index 0000000000..294e871035
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Atomics/waitAsync/undefined-index-defaults-to-zero-agent.js
@@ -0,0 +1,79 @@
+// |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: >
+ Undefined index arg is coerced to zero
+info: |
+ Atomics.waitAsync( typedArray, index, value, timeout )
+
+ 1. Return DoWait(async, typedArray, index, value, timeout).
+
+ DoWait ( mode, typedArray, index, value, timeout )
+
+ 2. Let i be ? ValidateAtomicAccess(typedArray, index).
+ ...
+ 2.Let accessIndex be ? ToIndex(requestIndex).
+
+ 9.If IsSharedArrayBuffer(buffer) is false, throw a TypeError exception.
+ ...
+ 3.If bufferData is a Data Block, return false
+
+ If value is undefined, then
+ Let index be 0.
+
+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 WAIT_INDEX = 0;
+const RUNNING = 1;
+const NUMAGENT = 2;
+const NOTIFYCOUNT = 2;
+
+$262.agent.start(`
+ $262.agent.receiveBroadcast(async (sab) => {
+ var i32a = new Int32Array(sab);
+ Atomics.add(i32a, ${RUNNING}, 1);
+
+ $262.agent.report("A " + (await Atomics.waitAsync(i32a, undefined, 0).value));
+ $262.agent.leaving();
+ });
+`);
+
+$262.agent.start(`
+ $262.agent.receiveBroadcast(async (sab) => {
+ var i32a = new Int32Array(sab);
+ Atomics.add(i32a, ${RUNNING}, 1);
+
+ $262.agent.report("B " + (await Atomics.waitAsync(i32a, undefined, 0).value));
+ $262.agent.leaving();
+ });
+`);
+
+const i32a = new Int32Array(
+ new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
+);
+
+$262.agent.safeBroadcastAsync(i32a, RUNNING, NUMAGENT).then(async (agentCount) => {
+
+ assert.sameValue(agentCount, NUMAGENT, 'The value of `agentCount` is expected to equal the value of NUMAGENT');
+
+ assert.sameValue(
+ Atomics.notify(i32a, WAIT_INDEX, NOTIFYCOUNT),
+ NOTIFYCOUNT,
+ 'Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)), 0, 2) must return the value of NOTIFYCOUNT'
+ );
+
+ const reports = [
+ await $262.agent.getReportAsync(),
+ await $262.agent.getReportAsync(),
+ ];
+
+ reports.sort();
+ assert.sameValue(reports[0], 'A ok', 'The value of reports[0] is "A ok"');
+ assert.sameValue(reports[1], 'B ok', 'The value of reports[1] is "B ok"');
+}).then($DONE, $DONE);