Atomics.waitAsync: negative timeout

test/built-ins/Atomics/waitAsync/negative-timeout-agent.js

@@ -0,0 +1,38 @@
+// 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
+includes: [atomicsHelper.js]
+features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics]
+---*/
+
+const RUNNING = 1;
+
+$262.agent.start(`
+  $262.agent.receiveBroadcast(async (sab) => {
+    var i32a = new Int32Array(sab);
+    Atomics.add(i32a, ${RUNNING}, 1);
+    $262.agent.report(await Atomics.waitSync(i32a, 0, 0, -5).value); // -5 => 0
+    $262.agent.leaving();
+  });
+`);
+
+const i32a = new Int32Array(
+  new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
+);
+
+$262.agent.safeBroadcast(i32a);
+$262.agent.waitUntil(i32a, RUNNING, 1);
+
+// Try to yield control to ensure the agent actually started to wait.
+$262.agent.tryYield();
+
+assert.sameValue(
+  $262.agent.getReport(),
+  'timed-out',
+  '$262.agent.getReport() returns "timed-out"'
+);
+assert.sameValue(Atomics.notify(i32a, 0), 0, 'Atomics.notify(i32a, 0) returns 0');

test/built-ins/Atomics/waitAsync/negative-timeout.js

@@ -0,0 +1,20 @@
+// 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
+flags: [async]
+features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics]
+---*/
+const i32a = new Int32Array(
+  new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
+);
+
+let {async, value} = Atomics.waitAsync(i32a, 0, 0, -1);
+
+
+value.then(outcome => {
+  assert.sameValue(outcome, "timed-out");
+}, $DONE).then($DONE, $DONE);