log4js-node/test/logLevelFilter.js

var vows = require('vows')
, fs = require('fs')
, assert = require('assert');

function remove(filename) {
    try {
        fs.unlinkSync(filename);
    } catch (e) {
        //doesn't really matter if it failed
    }
}

vows.describe('log4js logLevelFilter').addBatch({
    'appender': {
        topic: function() {
            var log4js = require('../lib/log4js'), logEvents = [], logger;
            log4js.clearAppenders();
            log4js.addAppender(log4js.logLevelFilter('ERROR', function(evt) { logEvents.push(evt); }), "logLevelTest");
            logger = log4js.getLogger("logLevelTest");
            logger.debug('this should not trigger an event');
            logger.warn('neither should this');
            logger.error('this should, though');
            logger.fatal('so should this');
            return logEvents;
        },
        'should only pass log events greater than or equal to its own level' : function(logEvents) {
            assert.equal(logEvents.length, 2);
            assert.equal(logEvents[0].data[0], 'this should, though');
            assert.equal(logEvents[1].data[0], 'so should this');
        }
    },

    'configure': {
        topic: function() {
            var log4js = require('../lib/log4js')
          , logger;

            remove(__dirname + '/logLevelFilter.log');
            remove(__dirname + '/logLevelFilter-warnings.log');

            log4js.configure('test/with-logLevelFilter.json');
	    logger = log4js.getLogger("tests");
	    logger.info('main');
	    logger.error('both');
	    logger.warn('both');
	    logger.debug('main');
            //wait for the file system to catch up
            setTimeout(this.callback, 100);
        },
	'tmp-tests.log': {
	    topic: function() {
		fs.readFile(__dirname + '/logLevelFilter.log', 'utf8', this.callback);
            },
            'should contain all log messages': function(contents) {
                var messages = contents.trim().split('\n');
	        assert.deepEqual(messages, ['main','both','both','main']);
            }
        },
        'tmp-tests-warnings.log': {
	    topic: function() {
		fs.readFile(__dirname + '/logLevelFilter-warnings.log','utf8',this.callback);
            },
            'should contain only error and warning log messages': function(contents) {
                var messages = contents.trim().split('\n');
	        assert.deepEqual(messages, ['both','both']);
	    }
        }
    }
}).export(module);