93 lines
2.6 KiB
JavaScript
93 lines
2.6 KiB
JavaScript
describe('File Logger', function () {
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var Log = require('../../src/lib/log');
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var FileLogger = require('../../src/lib/loggers/file');
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var once = require('events').EventEmitter.prototype.once;
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var _ = require('lodash');
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var parentLog;
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var logger;
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var expect = require('expect.js');
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var fs = require('fs');
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var stub = require('./auto_release_stub').make();
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beforeEach(function () {
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parentLog = new Log();
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});
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afterEach(function () {
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parentLog.close();
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if (logger
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&& logger.stream
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&& logger.stream._writableState
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&& logger.stream._writableState.buffer.length
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) {
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// empty the buffer manually
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logger.stream._writableState.buffer.splice(0);
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}
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});
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function makeLogger(parent, levels) {
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parent = parent || parentLog;
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logger = new FileLogger(parent, {
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levels: Log.parseLevels(levels || 'trace'),
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path: 'test.log'
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});
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return logger;
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}
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require('./generic_logger_tests')(makeLogger);
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describe('buffer flush', function () {
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if (require('stream').Writable) {
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it('writes everything in the buffer to console.error', function () {
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var line = 'This string is written 10 times to create buffered output\n';
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var exitHandler;
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stub(process, 'once', function (event, handler) {
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if (event === 'exit') {
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exitHandler = handler;
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}
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once.call(process, event, handler);
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});
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var logger = makeLogger();
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// write the line 10 times
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_.times(10, function () {
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logger.onDebug(line);
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});
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// collect everything that is written to fs.appendFileSync
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var flushedOutput = '';
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stub(fs, 'appendFileSync', function (path, str) {
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flushedOutput += str;
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});
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// call the event handler
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exitHandler.call(process);
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// the first line is sent immediately to _write and there is nothing we can do about that
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expect(flushedOutput).to.match(new RegExp(line));
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expect(flushedOutput.match(new RegExp(line, 'g')).length).to.be(9);
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});
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} else {
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it('does not fall apart with non streams2 streams', function () {
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var exitHandler;
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stub(process, 'once', function (event, handler) {
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if (event === 'exit') {
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exitHandler = handler;
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}
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once.call(process, event, handler);
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});
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var logger = makeLogger();
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expect(function () {
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// call the event handler
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exitHandler.call(process);
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}).to.not.throw();
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});
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}
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});
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});
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