Updated the files.

my-app/node_modules/piscina/test/fixtures/send-buffer-then-get-length.js

@@ -0,0 +1,18 @@
+'use strict';
+
+const Piscina = require('../../dist/src');
+
+let time;
+module.exports = {
+  send: async () => {
+    const data = new ArrayBuffer(128);
+    try {
+      return Piscina.move(data);
+    } finally {
+      setTimeout(() => { time = data.byteLength; }, 1000);
+    }
+  },
+  get: () => {
+    return time;
+  }
+};