I have a node.js project on cygwin, which I test with mocha.
My logger is log4js.
I have an appender to get log4js to write to file, but I don't know how to get it to write it exactly as I want.
Must-haves:
- A different file for each time mocha runs (it's OK if mocha clobbers the old log files)
- Unix line endings
Nice-to-have:
- No color encodings in the file (I can get around this when mocha is run with
-C
, but ideally there would be something inlog4js-config.js
.)
How do I do this?
My current setup is as follows.
My log4js-config.js
:
var log4js = require('log4js');
var log4js_config = {
"appenders": [{
"type": "console",
"layout": {
"type": "pattern",
"pattern": "%[%d{yyyy-MM-ddThh:mm:ss.SSS} [pid=%x{pid}] %p %c -%] %m",
"tokens": {pid: function(){return process.pid;}}
}
},{
"type": "file",
"filename": "jxg_log.log",
"layout": {
"type": "pattern",
"pattern": "%d{yyyy-MM-ddThh:mm:ss.SSS} [pid=%x{pid}] %p %c - %m",
"tokens": {pid: function(){return process.pid;}}
}
}],
replaceConsole: true
};
log4js.configure(log4js_config, {});
exports.logging = log4js;
My test file is:
var assert = require("assert");
var logger = require('../src/log4js-config').logging.getLogger('Mocha-Test');
describe('Array', function(){
describe('#indexOf()', function(){
it('should return -1 when the value is not present', function(){
logger.debug("logger debug line 1");
assert.equal(-1, [1,2,3].indexOf(5));
assert.equal(-1, [1,2,3].indexOf(0));
logger.debug("logger debug last line");
})
})
})
(For the purposes of this question, there is no code under test. I run mocha with ./node_modules/mocha/bin/mocha
.)
The log file that is output is this:
2014-11-24T13:45:00.012 [pid=90652] INFO console - %m
2014-11-24T13:45:00.018 [pid=90652] INFO console - %m
2014-11-24T13:45:00.019 [pid=90652] INFO console - Array
2014-11-24T13:45:00.020 [pid=90652] INFO console - #indexOf()
2014-11-24T13:45:00.021 [pid=90652] DEBUG Mocha-Test - logger debug line 1
2014-11-24T13:45:00.021 [pid=90652] DEBUG Mocha-Test - logger debug last line
2014-11-24T13:45:19.090 [pid=90180] INFO console - %m
2014-11-24T13:45:19.093 [pid=90180] INFO console - %m
2014-11-24T13:45:19.095 [pid=90180] INFO console - Array
2014-11-24T13:45:19.095 [pid=90180] INFO console - #indexOf()
2014-11-24T13:45:19.096 [pid=90180] DEBUG Mocha-Test - logger debug line 1
2014-11-24T13:45:19.096 [pid=90180] DEBUG Mocha-Test - logger debug last line
2014-11-24T13:50:13.716 [pid=88476] INFO console - %m
2014-11-24T13:50:13.720 [pid=88476] INFO console - [0m[0m
2014-11-24T13:50:13.721 [pid=88476] INFO console - [0m Array[0m
2014-11-24T13:50:13.722 [pid=88476] INFO console - [0m #indexOf()[0m
2014-11-24T13:50:13.722 [pid=88476] DEBUG Mocha-Test - logger debug line 1
2014-11-24T13:50:13.723 [pid=88476] DEBUG Mocha-Test - logger debug last line
Note three mocha runs here; the third time, I left out the -C
to show the color encoding.
I can't show the line endings directly in the question, but there's this:
$ file jxg_log.log
jxg_log.log: ASCII text, with CRLF line terminators, with escape sequences
So, again: how can I overwrite the log file on subsequent runs, output unix newlines, and suppress the color codes?