1 files changed, 59 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Atomics/notify/notify-zero.js b/js/src/tests/test262/built-ins/Atomics/notify/notify-zero.js
new file mode 100644
index 0000000000..87053ac73d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Atomics/notify/notify-zero.js
@@ -0,0 +1,59 @@
+// |reftest| skip-if(!this.hasOwnProperty('Atomics')||!this.hasOwnProperty('SharedArrayBuffer')||(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('arm64-simulator'))) -- Atomics,SharedArrayBuffer is not enabled unconditionally, ARM64 Simulator cannot emulate atomics
+// Copyright (C) 2017 Mozilla Corporation.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-atomics.notify
+description: >
+  Test that Atomics.notify notifies zero waiters if that's what the count is.
+includes: [atomicsHelper.js]
+features: [Atomics, SharedArrayBuffer, TypedArray]
+---*/
+
+const WAIT_INDEX = 0;             // Agents wait here
+const RUNNING = 1;                // Accounting of live agents here
+const NOTIFYCOUNT = 0;
+const NUMAGENT = 3;
+const BUFFER_SIZE = 4;
+
+const TIMEOUT = $262.agent.timeouts.long;
+
+for (var i = 0; i < NUMAGENT; i++) {
+  $262.agent.start(`
+    $262.agent.receiveBroadcast(function(sab) {
+      const i32a = new Int32Array(sab);
+      Atomics.add(i32a, ${RUNNING}, 1);
+
+      // Waiters that are not woken will time out eventually.
+      $262.agent.report(Atomics.wait(i32a, ${WAIT_INDEX}, 0, ${TIMEOUT}));
+      $262.agent.leaving();
+    });
+  `);
+}
+
+const i32a = new Int32Array(
+  new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * BUFFER_SIZE)
+);
+
+$262.agent.safeBroadcast(i32a);
+
+// Wait for agents to be running.
+$262.agent.waitUntil(i32a, RUNNING, NUMAGENT);
+
+// Try to yield control to ensure the agent actually started to wait.
+$262.agent.tryYield();
+
+assert.sameValue(
+  Atomics.notify(i32a, WAIT_INDEX, NOTIFYCOUNT),
+  NOTIFYCOUNT,
+  'Atomics.notify(i32a, WAIT_INDEX, NOTIFYCOUNT) returns the value of `NOTIFYCOUNT`'
+);
+
+// Try to sleep past the timeout.
+$262.agent.trySleep(TIMEOUT);
+
+for (var i = 0; i < NUMAGENT; i++) {
+  assert.sameValue($262.agent.getReport(), 'timed-out', '$262.agent.getReport() returns "timed-out"');
+}
+
+reportCompare(0, 0);