node-bunyan-lite/test/ctor.test.js

/*
 * Copyright (c) 2012 Trent Mick. All rights reserved.
 *
 * Test type checking on creation of the Logger.
 */

var test = require('tap').test;
var Logger = require('../lib/bunyan');


test('ensure Logger creation options', function (t) {
  t.throws(function () { new Logger(); },
    {name: 'TypeError', message: 'options (object) is required'},
    'no options should throw');

  t.throws(function () { new Logger({}); },
    {name: 'TypeError', message: 'options.name (string) is required'},
    'no options.name should throw');

  t.doesNotThrow(function () { new Logger({name: 'foo'}); },
    'just options.name should be sufficient');

  var options = {name: 'foo', stream: process.stdout, streams: []};
  t.throws(function () { new Logger(options); },
    'cannot use "stream" and "streams"');

  options = {name: 'foo', level: 'info', streams: []};
  t.throws(function () { new Logger(options); },
    'cannot use "level" and "streams"');

  // https://github.com/trentm/node-bunyan/issues/3
  options = {name: 'foo', streams: {}};
  t.throws(function () { new Logger(options); },
    {name: 'TypeError', message: 'invalid options.streams: must be an array'},
    '"streams" must be an array');

  options = {name: 'foo', serializers: 'a string'};
  t.throws(function () { new Logger(options); },
    {name: 'TypeError', message: 'invalid options.serializers: must be an object'},
    '"serializers" cannot be a string');

  options = {name: 'foo', serializers: [1,2,3]};
  t.throws(function () { new Logger(options); },
    {name: 'TypeError', message: 'invalid options.serializers: must be an object'},
    '"serializers" cannot be an array');

  t.end();
});


test('ensure Logger child() options', function (t) {
  var log = new Logger({name: 'foo'});

  t.doesNotThrow(function () { log.child(); },
    'no options should be fine');

  t.doesNotThrow(function () { log.child({}); },
    'empty options should be fine too');

  t.throws(function () { log.child({name: 'foo'}); },
    {name: 'TypeError', message: 'invalid options.name: child cannot set logger name'},
    'child cannot change name');

  var options = {stream: process.stdout, streams: []};
  t.throws(function () { log.child(options); },
    'cannot use "stream" and "streams"');

  options = {level: 'info', streams: []};
  t.throws(function () { log.child(options); },
    'cannot use "level" and "streams"');

  // https://github.com/trentm/node-bunyan/issues/3
  options = {streams: {}};
  t.throws(function () { log.child(options); },
    {name: 'TypeError', message: 'invalid options.streams: must be an array'},
    '"streams" must be an array');

  options = {serializers: "a string"};
  t.throws(function () { log.child(options); },
    {name: 'TypeError', message: 'invalid options.serializers: must be an object'},
    '"serializers" cannot be a string');

  options = {serializers: [1,2,3]};
  t.throws(function () { log.child(options); },
    {name: 'TypeError', message: 'invalid options.serializers: must be an object'},
    '"serializers" cannot be an array');

  t.end();
});