text: const test = require("ava");
  const serveStatic = require("serve-static");
  const cp = require("child_process");
  const http = require("http");
  
  test("get components height", async (t) => {
    const height = new Promise((resolve, reject) => {
      // static file server
      const serve = serveStatic(__dirname);
      const server = http.createServer((req, res) => {
        serve(req, res, function (err) {
          res.statusCode = err ? err.status || 500 : 404;
          res.end(err ? err.stack : "sorry!");
        });
      });
  
      server.on("listening", () => {
        const puppet = cp.fork(`lib/puppeteer.js`);
  
        puppet.once("message", function (data) {
          if (data === "puppeteer-ready") {
            puppet.once("message", function (data) {
              puppet.kill();
              resolve(data);
            });
  
            puppet.send({
              url: "http://localhost:3000/fixtures/222.html",
            });
          }
        });
      });
  
      server.listen(3000);
    });
  
    t.is(await height, 222);
  });
  