test: add Worker SAB tests

tests/helpers/worker-sab.js

@@ -0,0 +1,12 @@
+self.addEventListener('message', e => {
+    const magic = 42;
+    const i32 = e.data;
+
+    Atomics.wait(i32, 0, 0);
+
+    self.postMessage({ success: i32[0] === magic });
+});
+
+self.addEventListener('messageerror', e => {
+    throw new Error(`Opps! ${e}`);
+});

tests/test-worker-sab.js

@@ -0,0 +1,27 @@
+import assert from 'tjs:assert';
+import path from 'tjs:path';
+
+
+const magic = 42;
+const sab = new SharedArrayBuffer(16);
+const i32 = new Int32Array(sab);
+
+const w = new Worker(path.join(import.meta.dirname, 'helpers', 'worker-sab.js'));
+const timer = setTimeout(() => {
+    w.terminate();
+    assert.fail('Timeout out waiting for worker');
+}, 1500);
+w.onmessage = event => {
+    clearTimeout(timer);
+    assert.ok(event.data.success, 'The value change was detected');
+    assert.eq(i32[0], magic, 'Magic value was set');
+    w.terminate();
+};
+w.onmessageerror = event => {
+    assert.fail(`Error receiving message from worker: ${event}`);
+};
+w.postMessage(i32);
+setTimeout(() => {
+    Atomics.store(i32, 0 , magic);
+    Atomics.notify(i32, 0);
+}, 100);