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

function checkDest(field, result, value) {
  const dest = {};

  if (value) dest[field] = 'test';
  const incomingMessage = new IncomingMessage(field);
  // dest is changed by IncomingMessage._addHeaderLine
  incomingMessage._addHeaderLine(field, value, dest);
  assert.deepStrictEqual(dest, result);
}

checkDest('', {'': undefined});
checkDest('Content-Type', {'content-type': undefined});
checkDest('content-type', {'content-type': 'test'}, 'value');
checkDest('User-Agent', {'user-agent': undefined});
checkDest('user-agent', {'user-agent': 'test'}, 'value');
checkDest('Referer', {referer: undefined});
checkDest('referer', {referer: 'test'}, 'value');
checkDest('Host', {host: undefined});
checkDest('host', {host: 'test'}, 'value');
checkDest('Authorization', {authorization: undefined}, undefined);
checkDest('authorization', {authorization: 'test'}, 'value');
checkDest('Proxy-Authorization', {'proxy-authorization': undefined});
checkDest('proxy-authorization', {'proxy-authorization': 'test'}, 'value');
checkDest('If-Modified-Since', {'if-modified-since': undefined});
checkDest('if-modified-since', {'if-modified-since': 'test'}, 'value');
checkDest('If-Unmodified-Since', {'if-unmodified-since': undefined});
checkDest('if-unmodified-since', {'if-unmodified-since': 'test'}, 'value');
checkDest('Form', {form: undefined});
checkDest('form', {form: 'test, value'}, 'value');
checkDest('Location', {location: undefined});
checkDest('location', {location: 'test'}, 'value');
checkDest('Max-Forwards', {'max-forwards': undefined});
checkDest('max-forwards', {'max-forwards': 'test'}, 'value');
checkDest('Retry-After', {'retry-after': undefined});
checkDest('retry-after', {'retry-after': 'test'}, 'value');
checkDest('Etag', {etag: undefined});
checkDest('etag', {etag: 'test'}, 'value');
checkDest('Last-Modified', {'last-modified': undefined});
checkDest('last-modified', {'last-modified': 'test'}, 'value');
checkDest('Server', {server: undefined});
checkDest('server', {server: 'test'}, 'value');
checkDest('Age', {age: undefined});
checkDest('age', {age: 'test'}, 'value');
checkDest('Expires', {expires: undefined});
checkDest('expires', {expires: 'test'}, 'value');
checkDest('Set-Cookie', {'set-cookie': [undefined]});
checkDest('set-cookie', {'set-cookie': [undefined]});
checkDest('Transfer-Encoding', {'transfer-encoding': undefined});
checkDest('transfer-encoding', {'transfer-encoding': 'test, value'}, 'value');
checkDest('Date', {date: undefined});
checkDest('date', {date: 'test, value'}, 'value');
checkDest('Connection', {connection: undefined});
checkDest('connection', {connection: 'test, value'}, 'value');
checkDest('Cache-Control', {'cache-control': undefined});
checkDest('cache-control', {'cache-control': 'test, value'}, 'value');
checkDest('Transfer-Encoding', {'transfer-encoding': undefined});
checkDest('transfer-encoding', {'transfer-encoding': 'test, value'}, 'value');
checkDest('Vary', {vary: undefined});
checkDest('vary', {vary: 'test, value'}, 'value');
checkDest('Content-Encoding', {'content-encoding': undefined}, undefined);
checkDest('content-encoding', {'content-encoding': 'test, value'}, 'value');
checkDest('Cookies', {cookies: undefined});
checkDest('cookies', {cookies: 'test, value'}, 'value');
checkDest('Origin', {origin: undefined});
checkDest('origin', {origin: 'test, value'}, 'value');
checkDest('Upgrade', {upgrade: undefined});
checkDest('upgrade', {upgrade: 'test, value'}, 'value');
checkDest('Expect', {expect: undefined});
checkDest('expect', {expect: 'test, value'}, 'value');
checkDest('If-Match', {'if-match': undefined});
checkDest('if-match', {'if-match': 'test, value'}, 'value');
checkDest('If-None-Match', {'if-none-match': undefined});
checkDest('if-none-match', {'if-none-match': 'test, value'}, 'value');
checkDest('Accept', {accept: undefined});
checkDest('accept', {accept: 'test, value'}, 'value');
checkDest('Accept-Encoding', {'accept-encoding': undefined});
checkDest('accept-encoding', {'accept-encoding': 'test, value'}, 'value');
checkDest('Accept-Language', {'accept-language': undefined});
checkDest('accept-language', {'accept-language': 'test, value'}, 'value');
checkDest('X-Forwarded-For', {'x-forwarded-for': undefined});
checkDest('x-forwarded-for', {'x-forwarded-for': 'test, value'}, 'value');
checkDest('X-Forwarded-Host', {'x-forwarded-host': undefined});
checkDest('x-forwarded-host', {'x-forwarded-host': 'test, value'}, 'value');
checkDest('X-Forwarded-Proto', {'x-forwarded-proto': undefined});
checkDest('x-forwarded-proto', {'x-forwarded-proto': 'test, value'}, 'value');