Tests: more Node.js tests.

test/node/write_multiple/app.js

@@ -0,0 +1,8 @@
+#!/usr/bin/env node
+
+require('unit-http').createServer(function (req, res) {
+    res.writeHead(200, {'Content-Type': 'text/plain', 'Content-Length': 14});
+    res.write('write');
+    res.write('write2');
+    res.end('end');
+}).listen(7080);