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[rbdr/cologne] / test / loggers / file.js

'use strict';

const Fs = require('fs');

const Tap = require('tap');

const FileLogger = require('../../lib/loggers/file');

// Prepare the test

const rawFile = './raw.log';
const formatterFile = './formatter.log';
const formatterString = 'example';

const logObjectA = {
  _timestamp: Date.now() + .134,
  _cologneLog: '1.0.0',
  _from: 'Dummy Logger',
  _level: 6,
  _levelString: 'info',
  message: 'MessageOne'
};

const logObjectB = {
  _timestamp: Date.now() + .134,
  _cologneLog: '1.0.0',
  _from: 'Dummy Logger',
  _level: 6,
  _levelString: 'info',
  message: 'MessageTwo'
};

const logs = [logObjectA, logObjectB];


const dummyFormatter = {
  values: [],
  format: function (logObject) {

    this.values.push(logObject);
    return formatterString;
  }
};

const rawLogger = new FileLogger({
  file: rawFile
});
const formatterLogger = new FileLogger({
  file: formatterFile,
  formatter: dummyFormatter
});

/**
 * TEST: #log() - regular
 */

rawLogger.log(...logs);

setTimeout(() => {

  Tap.test('raw file', (t) => {

    Fs.readFile(rawFile, { encoding: 'utf8' }, (_, contents) => {

      const lines = contents.trim().split('\n');

      Tap.equal(lines.length, logs.length,
        'it should send all params to the file');

      Tap.equal(JSON.stringify(logObjectA), lines[0],
        'it should log the raw json object');

      Fs.unlink(rawFile, () => {

        t.end();
      });
    });
  });
}, 100); // allow for flush
/**
 * TEST: #log() - formatter
 */

formatterLogger.log(...logs);

setTimeout(() => {

  Tap.test('formatted file', (t) => {

    Fs.readFile(formatterFile, { encoding: 'utf8' }, (_, contents) => {

      const lines = contents.trim().split('\n');

      Tap.equal(lines.length, logs.length,
        'it should send all params to the file');

      Tap.equal(formatterString, lines[0],
        'it should log the formatted object');

      Fs.unlink(formatterFile, () => {

        t.end();
      });
    });
  });
}, 100);