node/test/parallel/test-http-head-throw-on-response-body-write.js

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//
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'use strict';
const common = require('../common');
const assert = require('assert');
const http = require('http');

{
  const server = http.createServer((req, res) => {
    res.writeHead(200);
    res.end('this is content');
  });
  server.listen(0);

  server.on('listening', common.mustCall(function() {
    const req = http.request({
      port: this.address().port,
      method: 'HEAD',
      path: '/'
    }, common.mustCall((res) => {
      res.resume();
      res.on('end', common.mustCall(function() {
        server.close();
      }));
    }));
    req.end();
  }));
}

{
  const server = http.createServer({
    rejectNonStandardBodyWrites: true,
  }, (req, res) => {
    res.writeHead(204);
    assert.throws(() => {
      res.write('this is content');
    }, {
      code: 'ERR_HTTP_BODY_NOT_ALLOWED',
      name: 'Error',
      message: 'Adding content for this request method or response status is not allowed.'
    });
    res.end();
  });
  server.listen(0);

  server.on('listening', common.mustCall(function() {
    const req = http.request({
      port: this.address().port,
      method: 'GET',
      path: '/'
    }, common.mustCall((res) => {
      res.resume();
      res.on('end', common.mustCall(function() {
        server.close();
      }));
    }));
    req.end();
  }));
}

{
  const server = http.createServer({
    rejectNonStandardBodyWrites: false,
  }, (req, res) => {
    res.writeHead(200);
    res.end('this is content');
  });
  server.listen(0);

  server.on('listening', common.mustCall(function() {
    const req = http.request({
      port: this.address().port,
      method: 'HEAD',
      path: '/'
    }, common.mustCall((res) => {
      res.resume();
      res.on('end', common.mustCall(function() {
        server.close();
      }));
    }));
    req.end();
  }));
}