http: added new test

test/parallel/test-http-agent-no-wait.js

@@ -0,0 +1,24 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const http = require('http');
+
+const server = http.createServer(function (req, res) {
+  res.writeHead(200);
+  res.end();
+});
+
+server.listen(0, common.mustCall(() => {
+  const req = http.get({ port: server.address().port }, (res) => {
+    assert.strictEqual(res.statusCode, 200);
+
+    res.resume();
+    server.close();
+  });
+
+  req.end();
+}));
+
+// This timer should never go off as the server will close the socket
+setTimeout(common.mustNotCall(), 1000).unref();