fileSyncAppender-test.js
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"use strict";
var vows = require('vows')
, fs = require('fs')
, path = require('path')
, sandbox = require('sandboxed-module')
, log4js = require('../lib/log4js')
, assert = require('assert')
, EOL = require('os').EOL || '\n';
log4js.clearAppenders();
function remove(filename) {
try {
fs.unlinkSync(filename);
} catch (e) {
//doesn't really matter if it failed
}
}
vows.describe('log4js fileSyncAppender').addBatch({
'with default fileSyncAppender settings': {
topic: function() {
var that = this
, testFile = path.join(__dirname, '/fa-default-sync-test.log')
, logger = log4js.getLogger('default-settings');
remove(testFile);
log4js.clearAppenders();
log4js.addAppender(
require('../lib/appenders/fileSync').appender(testFile),
'default-settings'
);
logger.info("This should be in the file.");
fs.readFile(testFile, "utf8", that.callback);
},
'should write log messages to the file': function (err, fileContents) {
assert.include(fileContents, "This should be in the file." + EOL);
},
'log messages should be in the basic layout format': function(err, fileContents) {
assert.match(
fileContents,
/\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}\] \[INFO\] default-settings - /
);
}
},
'with a max file size and no backups': {
topic: function() {
var testFile = path.join(__dirname, '/fa-maxFileSize-sync-test.log')
, logger = log4js.getLogger('max-file-size')
, that = this;
remove(testFile);
remove(testFile + '.1');
//log file of 100 bytes maximum, no backups
log4js.clearAppenders();
log4js.addAppender(
require('../lib/appenders/fileSync').appender(testFile, log4js.layouts.basicLayout, 100, 0),
'max-file-size'
);
logger.info("This is the first log message.");
logger.info("This is an intermediate log message.");
logger.info("This is the second log message.");
fs.readFile(testFile, "utf8", that.callback);
},
'log file should only contain the second message': function (err, fileContents) {
assert.include(fileContents, "This is the second log message." + EOL);
assert.equal(fileContents.indexOf("This is the first log message."), -1);
},
'the number of files': {
topic: function() {
fs.readdir(__dirname, this.callback);
},
'starting with the test file name should be two': function(err, files) {
//there will always be one backup if you've specified a max log size
var logFiles = files.filter(
function(file) { return file.indexOf('fa-maxFileSize-sync-test.log') > -1; }
);
assert.equal(logFiles.length, 2);
}
}
},
'with a max file size and 2 backups': {
topic: function() {
var testFile = path.join(__dirname, '/fa-maxFileSize-with-backups-sync-test.log')
, logger = log4js.getLogger('max-file-size-backups');
remove(testFile);
remove(testFile+'.1');
remove(testFile+'.2');
//log file of 50 bytes maximum, 2 backups
log4js.clearAppenders();
log4js.addAppender(
require('../lib/appenders/fileSync').appender(testFile, log4js.layouts.basicLayout, 50, 2),
'max-file-size-backups'
);
logger.info("This is the first log message.");
logger.info("This is the second log message.");
logger.info("This is the third log message.");
logger.info("This is the fourth log message.");
var that = this;
fs.readdir(__dirname, function(err, files) {
if (files) {
that.callback(null, files.sort());
} else {
that.callback(err, files);
}
});
},
'the log files': {
topic: function(files) {
var logFiles = files.filter(
function(file) { return file.indexOf('fa-maxFileSize-with-backups-sync-test.log') > -1; }
);
return logFiles;
},
'should be 3': function (files) {
assert.equal(files.length, 3);
},
'should be named in sequence': function (files) {
assert.deepEqual(files, [
'fa-maxFileSize-with-backups-sync-test.log',
'fa-maxFileSize-with-backups-sync-test.log.1',
'fa-maxFileSize-with-backups-sync-test.log.2'
]);
},
'and the contents of the first file': {
topic: function(logFiles) {
fs.readFile(path.join(__dirname, logFiles[0]), "utf8", this.callback);
},
'should be the last log message': function(contents) {
assert.include(contents, 'This is the fourth log message.');
}
},
'and the contents of the second file': {
topic: function(logFiles) {
fs.readFile(path.join(__dirname, logFiles[1]), "utf8", this.callback);
},
'should be the third log message': function(contents) {
assert.include(contents, 'This is the third log message.');
}
},
'and the contents of the third file': {
topic: function(logFiles) {
fs.readFile(path.join(__dirname, logFiles[2]), "utf8", this.callback);
},
'should be the second log message': function(contents) {
assert.include(contents, 'This is the second log message.');
}
}
}
}
}).addBatch({
'configure' : {
'with fileSyncAppender': {
topic: function() {
var log4js = require('../lib/log4js')
, logger;
//this config defines one file appender (to ./tmp-sync-tests.log)
//and sets the log level for "tests" to WARN
log4js.configure({
appenders: [{
category: "tests",
type: "file",
filename: "tmp-sync-tests.log",
layout: { type: "messagePassThrough" }
}],
levels: { tests: "WARN" }
});
logger = log4js.getLogger('tests');
logger.info('this should not be written to the file');
logger.warn('this should be written to the file');
fs.readFile('tmp-sync-tests.log', 'utf8', this.callback);
},
'should load appender configuration from a json file': function(err, contents) {
assert.include(contents, 'this should be written to the file' + EOL);
assert.equal(contents.indexOf('this should not be written to the file'), -1);
}
}
}
}).export(module);