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Persist logging config across invocations

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csausdev 2011-01-16 13:05:13 +11:00
parent cf7d5f681a
commit c6dd2398ab
2 changed files with 498 additions and 471 deletions
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371
lib/log4js.js
View File

@ -44,18 +44,14 @@
* @static * @static
* Website: http://log4js.berlios.de * Website: http://log4js.berlios.de
*/ */
module.exports = function (fileSystem, standardOutput, configPaths) { var events = require('events'),
var events = require('events'), path = require('path'),
path = require('path'), sys = require('sys'),
sys = require('sys'), DEFAULT_CATEGORY = '[default]',
fs = fileSystem || require('fs'), ALL_CATEGORIES = '[all]',
standardOutput = standardOutput || sys.puts, appenders = {},
configPaths = configPaths || require.paths, loggers = {},
DEFAULT_CATEGORY = '[default]', levels = {
ALL_CATEGORIES = '[all]',
loggers = {},
appenders = {},
levels = {
ALL: new Level(Number.MIN_VALUE, "ALL", "grey"), ALL: new Level(Number.MIN_VALUE, "ALL", "grey"),
TRACE: new Level(5000, "TRACE", "blue"), TRACE: new Level(5000, "TRACE", "blue"),
DEBUG: new Level(10000, "DEBUG", "cyan"), DEBUG: new Level(10000, "DEBUG", "cyan"),
@ -64,43 +60,43 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
ERROR: new Level(40000, "ERROR", "red"), ERROR: new Level(40000, "ERROR", "red"),
FATAL: new Level(50000, "FATAL", "magenta"), FATAL: new Level(50000, "FATAL", "magenta"),
OFF: new Level(Number.MAX_VALUE, "OFF", "grey") OFF: new Level(Number.MAX_VALUE, "OFF", "grey")
}, },
appenderMakers = { appenderMakers = {
"file": function(config) { "file": function(config, fileAppender) {
var layout; var layout;
if (config.layout) { if (config.layout) {
layout = layoutMakers[config.layout.type](config.layout); layout = layoutMakers[config.layout.type](config.layout);
} }
return fileAppender(config.filename, layout, config.maxLogSize, config.backups, config.pollInterval); return fileAppender(config.filename, layout, config.maxLogSize, config.backups, config.pollInterval);
}, },
"console": function(config) { "console": function(config, fileAppender, consoleAppender) {
var layout; var layout;
if (config.layout) { if (config.layout) {
layout = layoutMakers[config.layout.type](config.layout); layout = layoutMakers[config.layout.type](config.layout);
} }
return consoleAppender(layout); return consoleAppender(layout);
}, },
"logLevelFilter": function(config) { "logLevelFilter": function(config, fileAppender, consoleAppender) {
var appender = appenderMakers[config.appender.type](config.appender); var appender = appenderMakers[config.appender.type](config.appender, fileAppender, consoleAppender);
return logLevelFilter(config.level, appender); return logLevelFilter(config.level, appender);
} }
}, },
layoutMakers = { layoutMakers = {
"messagePassThrough": function() { return messagePassThroughLayout; }, "messagePassThrough": function() { return messagePassThroughLayout; },
"basic": function() { return basicLayout; }, "basic": function() { return basicLayout; },
"pattern": function (config) { "pattern": function (config) {
var pattern = config.pattern || undefined; var pattern = config.pattern || undefined;
return patternLayout(pattern); return patternLayout(pattern);
} }
}; };
/** /**
* Get a logger instance. Instance is cached on categoryName level. * Get a logger instance. Instance is cached on categoryName level.
* @param {String} categoryName name of category to log to. * @param {String} categoryName name of category to log to.
* @return {Logger} instance of logger for the category * @return {Logger} instance of logger for the category
* @static * @static
*/ */
function getLogger (categoryName) { function getLogger (categoryName) {
// Use default logger if categoryName is not specified or invalid // Use default logger if categoryName is not specified or invalid
if (!(typeof categoryName == "string")) { if (!(typeof categoryName == "string")) {
@ -126,12 +122,12 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
} }
return loggers[categoryName]; return loggers[categoryName];
} }
/** /**
* args are appender, then zero or more categories * args are appender, then zero or more categories
*/ */
function addAppender () { function addAppender () {
var args = Array.prototype.slice.call(arguments); var args = Array.prototype.slice.call(arguments);
var appender = args.shift(); var appender = args.shift();
if (args.length == 0 || args[0] === undefined) { if (args.length == 0 || args[0] === undefined) {
@ -158,53 +154,23 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
loggers[category].addListener("log", appender); loggers[category].addListener("log", appender);
} }
}); });
} appenders.count = appenders.count ? appenders.count++ : 1;
}
function clearAppenders () { function clearAppenders () {
appenders = []; appenders = {};
for (var logger in loggers) { for (var logger in loggers) {
if (loggers.hasOwnProperty(logger)) { if (loggers.hasOwnProperty(logger)) {
loggers[logger].removeAllListeners("log"); loggers[logger].removeAllListeners("log");
} }
} }
} }
function configure (configurationFile) { function configureAppenders(appenderList, fileAppender, consoleAppender) {
if (configurationFile) {
try {
var config = JSON.parse(fs.readFileSync(configurationFile, "utf8"));
configureAppenders(config.appenders);
configureLevels(config.levels);
} catch (e) {
throw new Error("Problem reading log4js config file " + configurationFile + ". Error was " + e.message);
}
}
}
function findConfiguration() {
//add current directory onto the list of configPaths
var paths = ['.'].concat(configPaths);
//add this module's directory to the end of the list, so that we pick up the default config
paths.push(__dirname);
var pathsWithConfig = paths.filter( function (pathToCheck) {
try {
fs.statSync(path.join(pathToCheck, "log4js.json"));
return true;
} catch (e) {
return false;
}
});
if (pathsWithConfig.length > 0) {
return path.join(pathsWithConfig[0], 'log4js.json');
}
return undefined;
}
function configureAppenders(appenderList) {
clearAppenders(); clearAppenders();
if (appenderList) { if (appenderList) {
appenderList.forEach(function(appenderConfig) { appenderList.forEach(function(appenderConfig) {
var appender = appenderMakers[appenderConfig.type](appenderConfig); var appender = appenderMakers[appenderConfig.type](appenderConfig, fileAppender, consoleAppender);
if (appender) { if (appender) {
addAppender(appender, appenderConfig.category); addAppender(appender, appenderConfig.category);
} else { } else {
@ -214,9 +180,9 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
} else { } else {
addAppender(consoleAppender); addAppender(consoleAppender);
} }
} }
function configureLevels(levels) { function configureLevels(levels) {
if (levels) { if (levels) {
for (var category in levels) { for (var category in levels) {
if (levels.hasOwnProperty(category)) { if (levels.hasOwnProperty(category)) {
@ -224,22 +190,22 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
} }
} }
} }
} }
function Level(level, levelStr, colour) { function Level(level, levelStr, colour) {
this.level = level; this.level = level;
this.levelStr = levelStr; this.levelStr = levelStr;
this.colour = colour; this.colour = colour;
} }
/** /**
* converts given String to corresponding Level * converts given String to corresponding Level
* @param {String} sArg String value of Level * @param {String} sArg String value of Level
* @param {Log4js.Level} defaultLevel default Level, if no String representation * @param {Log4js.Level} defaultLevel default Level, if no String representation
* @return Level object * @return Level object
* @type Log4js.Level * @type Log4js.Level
*/ */
Level.toLevel = function(sArg, defaultLevel) { Level.toLevel = function(sArg, defaultLevel) {
if (sArg === null) { if (sArg === null) {
return defaultLevel; return defaultLevel;
@ -252,21 +218,21 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
} }
} }
return defaultLevel; return defaultLevel;
}; };
Level.prototype.toString = function() { Level.prototype.toString = function() {
return this.levelStr; return this.levelStr;
}; };
Level.prototype.isLessThanOrEqualTo = function(otherLevel) { Level.prototype.isLessThanOrEqualTo = function(otherLevel) {
return this.level <= otherLevel.level; return this.level <= otherLevel.level;
}; };
Level.prototype.isGreaterThanOrEqualTo = function(otherLevel) { Level.prototype.isGreaterThanOrEqualTo = function(otherLevel) {
return this.level >= otherLevel.level; return this.level >= otherLevel.level;
}; };
/** /**
* Models a logging event. * Models a logging event.
* @constructor * @constructor
* @param {String} categoryName name of category * @param {String} categoryName name of category
@ -275,7 +241,7 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
* @param {Log4js.Logger} logger the associated logger * @param {Log4js.Logger} logger the associated logger
* @author Seth Chisamore * @author Seth Chisamore
*/ */
function LoggingEvent (categoryName, level, message, exception, logger) { function LoggingEvent (categoryName, level, message, exception, logger) {
this.startTime = new Date(); this.startTime = new Date();
this.categoryName = categoryName; this.categoryName = categoryName;
this.message = message; this.message = message;
@ -286,35 +252,35 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
} else if (exception) { } else if (exception) {
this.exception = new Error(sys.inspect(exception)); this.exception = new Error(sys.inspect(exception));
} }
} }
/** /**
* Logger to log messages. * Logger to log messages.
* use {@see Log4js#getLogger(String)} to get an instance. * use {@see Log4js#getLogger(String)} to get an instance.
* @constructor * @constructor
* @param name name of category to log to * @param name name of category to log to
* @author Stephan Strittmatter * @author Stephan Strittmatter
*/ */
function Logger (name, level) { function Logger (name, level) {
this.category = name || DEFAULT_CATEGORY; this.category = name || DEFAULT_CATEGORY;
this.level = Level.toLevel(level, levels.TRACE); this.level = Level.toLevel(level, levels.TRACE);
} }
sys.inherits(Logger, events.EventEmitter); sys.inherits(Logger, events.EventEmitter);
Logger.prototype.setLevel = function(level) { Logger.prototype.setLevel = function(level) {
this.level = Level.toLevel(level, levels.TRACE); this.level = Level.toLevel(level, levels.TRACE);
}; };
Logger.prototype.log = function(logLevel, message, exception) { Logger.prototype.log = function(logLevel, message, exception) {
var loggingEvent = new LoggingEvent(this.category, logLevel, message, exception, this); var loggingEvent = new LoggingEvent(this.category, logLevel, message, exception, this);
this.emit("log", loggingEvent); this.emit("log", loggingEvent);
}; };
Logger.prototype.isLevelEnabled = function(otherLevel) { Logger.prototype.isLevelEnabled = function(otherLevel) {
return this.level.isLessThanOrEqualTo(otherLevel); return this.level.isLessThanOrEqualTo(otherLevel);
}; };
['Trace','Debug','Info','Warn','Error','Fatal'].forEach( ['Trace','Debug','Info','Warn','Error','Fatal'].forEach(
function(levelString) { function(levelString) {
var level = Level.toLevel(levelString); var level = Level.toLevel(levelString);
Logger.prototype['is'+levelString+'Enabled'] = function() { Logger.prototype['is'+levelString+'Enabled'] = function() {
@ -327,99 +293,27 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
} }
}; };
} }
); );
/** /**
* Get the default logger instance. * Get the default logger instance.
* @return {Logger} instance of default logger * @return {Logger} instance of default logger
* @static * @static
*/ */
function getDefaultLogger () { function getDefaultLogger () {
return getLogger(DEFAULT_CATEGORY); return getLogger(DEFAULT_CATEGORY);
} }
function consoleAppender (layout) { function logLevelFilter (levelString, appender) {
layout = layout || colouredLayout;
return function(loggingEvent) {
standardOutput(layout(loggingEvent));
};
}
/**
* File Appender writing the logs to a text file. Supports rolling of logs by size.
*
* @param file file log messages will be written to
* @param layout a function that takes a logevent and returns a string (defaults to basicLayout).
* @param logSize - the maximum size (in bytes) for a log file, if not provided then logs won't be rotated.
* @param numBackups - the number of log files to keep after logSize has been reached (default 5)
* @param filePollInterval - the time in seconds between file size checks (default 30s)
*/
function fileAppender (file, layout, logSize, numBackups, filePollInterval) {
layout = layout || basicLayout;
//syncs are generally bad, but we need
//the file to be open before we start doing any writing.
var logFile = fs.openSync(file, 'a', 0644);
if (logSize > 0) {
setupLogRolling(logFile, file, logSize, numBackups || 5, (filePollInterval * 1000) || 30000);
}
return function(loggingEvent) {
fs.write(logFile, layout(loggingEvent)+'\n', null, "utf8");
};
}
function setupLogRolling (logFile, filename, logSize, numBackups, filePollInterval) {
fs.watchFile(filename,
{
persistent: false,
interval: filePollInterval
},
function (curr, prev) {
if (curr.size >= logSize) {
rollThatLog(logFile, filename, numBackups);
}
}
);
}
function rollThatLog (logFile, filename, numBackups) {
//doing all of this fs stuff sync, because I don't want to lose any log events.
//first close the current one.
fs.closeSync(logFile);
//roll the backups (rename file.n-1 to file.n, where n <= numBackups)
for (var i=numBackups; i > 0; i--) {
if (i > 1) {
if (fileExists(filename + '.' + (i-1))) {
fs.renameSync(filename+'.'+(i-1), filename+'.'+i);
}
} else {
fs.renameSync(filename, filename+'.1');
}
}
//open it up again
logFile = fs.openSync(filename, 'a', 0644);
}
function fileExists (filename) {
try {
fs.statSync(filename);
return true;
} catch (e) {
return false;
}
}
function logLevelFilter (levelString, appender) {
var level = Level.toLevel(levelString); var level = Level.toLevel(levelString);
return function(logEvent) { return function(logEvent) {
if (logEvent.level.isGreaterThanOrEqualTo(level)) { if (logEvent.level.isGreaterThanOrEqualTo(level)) {
appender(logEvent); appender(logEvent);
} }
} }
} }
/** /**
* BasicLayout is a simple layout for storing the logs. The logs are stored * BasicLayout is a simple layout for storing the logs. The logs are stored
* in following format: * in following format:
* <pre> * <pre>
@ -428,7 +322,7 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
* *
* @author Stephan Strittmatter * @author Stephan Strittmatter
*/ */
function basicLayout (loggingEvent) { function basicLayout (loggingEvent) {
var timestampLevelAndCategory = '[' + loggingEvent.startTime.toFormattedString() + '] '; var timestampLevelAndCategory = '[' + loggingEvent.startTime.toFormattedString() + '] ';
timestampLevelAndCategory += '[' + loggingEvent.level.toString() + '] '; timestampLevelAndCategory += '[' + loggingEvent.level.toString() + '] ';
timestampLevelAndCategory += loggingEvent.categoryName + ' - '; timestampLevelAndCategory += loggingEvent.categoryName + ' - ';
@ -445,12 +339,12 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
} }
} }
return output; return output;
} }
/** /**
* Taken from masylum's fork (https://github.com/masylum/log4js-node) * Taken from masylum's fork (https://github.com/masylum/log4js-node)
*/ */
function colorize (str, style) { function colorize (str, style) {
var styles = { var styles = {
//styles //styles
'bold' : [1, 22], 'bold' : [1, 22],
@ -471,13 +365,13 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
}; };
return '\033[' + styles[style][0] + 'm' + str + return '\033[' + styles[style][0] + 'm' + str +
'\033[' + styles[style][1] + 'm'; '\033[' + styles[style][1] + 'm';
} }
/** /**
* colouredLayout - taken from masylum's fork. * colouredLayout - taken from masylum's fork.
* same as basicLayout, but with colours. * same as basicLayout, but with colours.
*/ */
function colouredLayout (loggingEvent) { function colouredLayout (loggingEvent) {
var timestampLevelAndCategory = colorize('[' + loggingEvent.startTime.toFormattedString() + '] ', 'grey'); var timestampLevelAndCategory = colorize('[' + loggingEvent.startTime.toFormattedString() + '] ', 'grey');
timestampLevelAndCategory += colorize( timestampLevelAndCategory += colorize(
'[' + loggingEvent.level.toString() + '] ', loggingEvent.level.colour '[' + loggingEvent.level.toString() + '] ', loggingEvent.level.colour
@ -496,18 +390,18 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
} }
} }
return output; return output;
} }
function messagePassThroughLayout (loggingEvent) { function messagePassThroughLayout (loggingEvent) {
return loggingEvent.message; return loggingEvent.message;
} }
/** /**
* PatternLayout * PatternLayout
* Takes a pattern string and returns a layout function. * Takes a pattern string and returns a layout function.
* @author Stephan Strittmatter * @author Stephan Strittmatter
*/ */
function patternLayout (pattern) { function patternLayout (pattern) {
var TTCC_CONVERSION_PATTERN = "%r %p %c - %m%n"; var TTCC_CONVERSION_PATTERN = "%r %p %c - %m%n";
var regex = /%(-?[0-9]+)?(\.?[0-9]+)?([cdmnpr%])(\{([^\}]+)\})?|([^%]+)/; var regex = /%(-?[0-9]+)?(\.?[0-9]+)?([cdmnpr%])(\{([^\}]+)\})?|([^%]+)/;
@ -616,7 +510,117 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
return formattedString; return formattedString;
}; };
};
module.exports = function (fileSystem, standardOutput, configPaths) {
var fs = fileSystem || require('fs'),
standardOutput = standardOutput || sys.puts,
configPaths = configPaths || require.paths;
function consoleAppender (layout) {
layout = layout || colouredLayout;
return function(loggingEvent) {
standardOutput(layout(loggingEvent));
}; };
}
/**
* File Appender writing the logs to a text file. Supports rolling of logs by size.
*
* @param file file log messages will be written to
* @param layout a function that takes a logevent and returns a string (defaults to basicLayout).
* @param logSize - the maximum size (in bytes) for a log file, if not provided then logs won't be rotated.
* @param numBackups - the number of log files to keep after logSize has been reached (default 5)
* @param filePollInterval - the time in seconds between file size checks (default 30s)
*/
function fileAppender (file, layout, logSize, numBackups, filePollInterval) {
layout = layout || basicLayout;
//syncs are generally bad, but we need
//the file to be open before we start doing any writing.
var logFile = fs.openSync(file, 'a', 0644);
if (logSize > 0) {
setupLogRolling(logFile, file, logSize, numBackups || 5, (filePollInterval * 1000) || 30000);
}
return function(loggingEvent) {
fs.write(logFile, layout(loggingEvent)+'\n', null, "utf8");
};
}
function setupLogRolling (logFile, filename, logSize, numBackups, filePollInterval) {
fs.watchFile(filename,
{
persistent: false,
interval: filePollInterval
},
function (curr, prev) {
if (curr.size >= logSize) {
rollThatLog(logFile, filename, numBackups);
}
}
);
}
function rollThatLog (logFile, filename, numBackups) {
//doing all of this fs stuff sync, because I don't want to lose any log events.
//first close the current one.
fs.closeSync(logFile);
//roll the backups (rename file.n-1 to file.n, where n <= numBackups)
for (var i=numBackups; i > 0; i--) {
if (i > 1) {
if (fileExists(filename + '.' + (i-1))) {
fs.renameSync(filename+'.'+(i-1), filename+'.'+i);
}
} else {
fs.renameSync(filename, filename+'.1');
}
}
//open it up again
logFile = fs.openSync(filename, 'a', 0644);
}
function fileExists (filename) {
try {
fs.statSync(filename);
return true;
} catch (e) {
return false;
}
}
function configure (configurationFile) {
if (configurationFile) {
try {
var config = JSON.parse(fs.readFileSync(configurationFile, "utf8"));
configureAppenders(config.appenders, fileAppender, consoleAppender);
configureLevels(config.levels);
} catch (e) {
throw new Error("Problem reading log4js config file " + configurationFile + ". Error was \"" + e.message + "\" ("+e.stack+")");
}
}
}
function findConfiguration() {
//add current directory onto the list of configPaths
var paths = ['.'].concat(configPaths);
//add this module's directory to the end of the list, so that we pick up the default config
paths.push(__dirname);
var pathsWithConfig = paths.filter( function (pathToCheck) {
try {
fs.statSync(path.join(pathToCheck, "log4js.json"));
return true;
} catch (e) {
return false;
}
});
if (pathsWithConfig.length > 0) {
return path.join(pathsWithConfig[0], 'log4js.json');
}
return undefined;
}
function replaceConsole(logger) { function replaceConsole(logger) {
function replaceWith (fn) { function replaceWith (fn) {
@ -634,10 +638,13 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
} }
//do we already have appenders?
if (!appenders.count) {
//set ourselves up if we can find a default log4js.json //set ourselves up if we can find a default log4js.json
configure(findConfiguration()); configure(findConfiguration());
//replace console.log, etc with log4js versions //replace console.log, etc with log4js versions
replaceConsole(getLogger("console")); replaceConsole(getLogger("console"));
}
return { return {
getLogger: getLogger, getLogger: getLogger,

28
test/logging.js
View File

@ -247,7 +247,9 @@ vows.describe('log4js').addBatch({
'with no appenders defined' : { 'with no appenders defined' : {
topic: function() { topic: function() {
var logger, message, log4js = require('../lib/log4js')(null, function (msg) { message = msg; } ); var logger, message, log4jsFn = require('../lib/log4js'), log4js;
log4jsFn().clearAppenders();
log4js = log4jsFn(null, function (msg) { message = msg; } );
logger = log4js.getLogger("some-logger"); logger = log4js.getLogger("some-logger");
logger.debug("This is a test"); logger.debug("This is a test");
return message; return message;
@ -364,10 +366,15 @@ vows.describe('log4js').addBatch({
}, },
fakeConsoleLog = function (msg) { message = msg; }, fakeConsoleLog = function (msg) { message = msg; },
fakeRequirePath = [ '/a/b/c', '/some/other/path', '/path/to/config', '/some/later/directory' ], fakeRequirePath = [ '/a/b/c', '/some/other/path', '/path/to/config', '/some/later/directory' ],
log4js = require('../lib/log4js')(fakeFS, fakeConsoleLog, fakeRequirePath), log4jsFn = require('../lib/log4js'),
log4js, logger;
log4jsFn().clearAppenders();
log4js = log4jsFn(fakeFS, fakeConsoleLog, fakeRequirePath);
logger = log4js.getLogger('a-test'); logger = log4js.getLogger('a-test');
logger.debug("this is a test"); logger.debug("this is a test");
return [ pathsChecked, message ]; return [ pathsChecked, message ];
}, },
@ -478,8 +485,8 @@ vows.describe('log4js').addBatch({
topic: function() { topic: function() {
var log4js = require('../lib/log4js')(), logEvents = [], logger; var log4js = require('../lib/log4js')(), logEvents = [], logger;
log4js.clearAppenders(); log4js.clearAppenders();
log4js.addAppender(log4js.logLevelFilter('ERROR', function(evt) { logEvents.push(evt); })); log4js.addAppender(log4js.logLevelFilter('ERROR', function(evt) { logEvents.push(evt); }), "logLevelTest");
logger = log4js.getLogger(); logger = log4js.getLogger("logLevelTest");
logger.debug('this should not trigger an event'); logger.debug('this should not trigger an event');
logger.warn('neither should this'); logger.warn('neither should this');
logger.error('this should, though'); logger.error('this should, though');
@ -535,6 +542,19 @@ vows.describe('log4js').addBatch({
assert.equal(logEvent.message, "tracing"); assert.equal(logEvent.message, "tracing");
assert.equal(logEvent.level.toString(), "TRACE"); assert.equal(logEvent.level.toString(), "TRACE");
} }
},
'configuration persistence' : {
'should maintain appenders between requires': function () {
var logEvent, firstLog4js = require('../lib/log4js')(), secondLog4js;
firstLog4js.clearAppenders();
firstLog4js.addAppender(function(evt) { logEvent = evt; });
secondLog4js = require('../lib/log4js')();
secondLog4js.getLogger().info("This should go to the appender defined in firstLog4js");
assert.equal(logEvent.message, "This should go to the appender defined in firstLog4js");
}
} }
}).export(module); }).export(module);