00-file-stress.test.js
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'use strict';
/*
* file-stress.test.js: Tests for stressing File transport: volume, ambient event loop lag.
*
* (C) 2016 Charlie Robbins
* MIT LICENSE
*
*/
const fs = require('fs');
const os = require('os');
const path = require('path');
const assume = require('assume');
const helpers = require('../helpers');
const split = require('split2');
const winston = require('../../lib/winston');
describe('File (stress)', function () {
this.timeout(30 * 1000);
const logPath = path.resolve(__dirname, '../fixtures/logs/file-stress-test.log');
beforeEach(function () {
try {
fs.unlinkSync(logPath);
} catch (ex) {
if (ex && ex.code !== 'ENOENT') { return done(ex); }
}
});
it('should handle a high volume of writes', function (done) {
const logger = winston.createLogger({
transports: [new winston.transports.File({
filename: logPath
})]
});
const counters = {
write: 0,
read: 0
};
const interval = setInterval(function () {
logger.info(++counters.write);
}, 0);
setTimeout(function () {
clearInterval(interval);
helpers.tryRead(logPath)
.on('error', function (err) {
assume(err).false();
logger.close();
done();
})
.pipe(split())
.on('data', function (d) {
const json = JSON.parse(d);
assume(json.level).equal('info');
assume(json.message).equal(++counters.read);
})
.on('end', function () {
assume(counters.write).equal(counters.read);
logger.close();
done();
});
}, 10000);
});
it('should handle a high volume of large writes', function (done) {
const logger = winston.createLogger({
transports: [new winston.transports.File({
filename: logPath
})]
});
const counters = {
write: 0,
read: 0
};
const interval = setInterval(function () {
const msg = {
counter: ++counters.write,
message: 'a'.repeat(16384 - os.EOL.length - 1)
};
logger.info(msg);
}, 0);
setTimeout(function () {
clearInterval(interval);
helpers.tryRead(logPath)
.on('error', function (err) {
assume(err).false();
logger.close();
done();
})
.pipe(split())
.on('data', function (d) {
const json = JSON.parse(d);
assume(json.level).equal('info');
assume(json.message).equal('a'.repeat(16384 - os.EOL.length - 1));
assume(json.counter).equal(++counters.read);
})
.on('end', function () {
assume(counters.write).equal(counters.read);
logger.close();
done();
});
}, 10000);
});
it('should handle a high volume of large writes synchronous', function (done) {
const logger = winston.createLogger({
transports: [new winston.transports.File({
filename: logPath
})]
});
const counters = {
write: 0,
read: 0
};
const msgs = new Array(10).fill().map(() => ({
counter: ++counters.write,
message: 'a'.repeat(16384 - os.EOL.length - 1)
}));
msgs.forEach(msg => logger.info(msg));
setTimeout(function () {
helpers.tryRead(logPath)
.on('error', function (err) {
assume(err).false();
logger.close();
done();
})
.pipe(split())
.on('data', function (d) {
const json = JSON.parse(d);
assume(json.level).equal('info');
assume(json.message).equal('a'.repeat(16384 - os.EOL.length - 1));
assume(json.counter).equal(++counters.read);
})
.on('end', function () {
assume(counters.write).equal(counters.read);
logger.close();
done();
});
}, 10000);
});
});