Uses postMessage transfers

test/features/tests.js

@@ -540,6 +540,39 @@ var tests = [
     impact: 'Important',
     area: 'Core'
   },
+  {
+    id: 'Worker-transfers',
+    name: 'Worker can use transfers for postMessage',
+    run: function () {
+      if (typeof Worker == 'undefined')
+        return { output: 'Skipped', emulated: '' };
+
+      try {
+        var worker = new Worker('worker-stub.js');
+
+        var promise = new Promise();
+        var timeout = setTimeout(function () {
+          promise.resolve({ output: 'Failed', emulated: '?' });
+        }, 5000);
+
+        worker.addEventListener('message', function (e) {
+          var data = e.data;
+          if (data.action == 'test-transfers' && data.result)
+            promise.resolve({ output: 'Success', emulated: '' });
+          else
+            promise.resolve({ output: 'Failed', emulated: 'Yes' });
+        }, false);
+        var testObj = new Uint8Array([255]);
+        worker.postMessage({action: 'test-transfers',
+          data: testObj}, [testObj.buffer]);
+        return promise;
+      } catch (e) {
+        return { output: 'Failed', emulated: 'Yes' };
+      }
+    },
+    impact: 'Normal',
+    area: 'Core'
+  },
   {
     id: 'Worker-xhr-response',
     name: 'XMLHttpRequest supports the reponse property in web workers',

test/features/worker-stub.js

@@ -21,6 +21,9 @@ onmessage = function (e) {
   case 'test':
     postMessage({action: 'test', result: data.data instanceof Uint8Array});
     break;
+  case 'test-transfers':
+    postMessage({action: 'test-transfers', result: data.data[0] === 255});
+    break;
   case 'xhr':
     var xhr = new XMLHttpRequest();
     var responseExists = 'response' in xhr;