node: fix test-net-sync-cork.js

test/js/node/test/parallel/test-net-sync-cork.js

@@ -0,0 +1,33 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const net = require('net');
+
+const server = net.createServer(handle);
+
+const N = 100;
+const buf = Buffer.alloc(2, 'a');
+
+server.listen(0, function() {
+  const conn = net.connect(this.address().port);
+
+  conn.on('connect', () => {
+    let res = true;
+    let i = 0;
+    for (; i < N && res; i++) {
+      conn.cork();
+      conn.write(buf);
+      res = conn.write(buf);
+      conn.uncork();
+    }
+    assert.strictEqual(i, N);
+    conn.end();
+  });
+});
+
+function handle(socket) {
+  socket.resume();
+  socket.on('error', common.mustNotCall())
+        .on('close', common.mustCall(() => server.close()));
+}