7c1573fb07
* switch from custom eslint config to standard + prettier * fix new standard eslint violations * add editorconfig file * auto-fix all other violations * update lint yarn script * remove jshint comment
94 lines
2.7 KiB
JavaScript
94 lines
2.7 KiB
JavaScript
describe('Stream Logger', function() {
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var Log = require('../../../src/lib/log');
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var StreamLogger = require('../../../src/lib/loggers/stream');
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var MockWritableStream = require('../../mocks/writable_stream');
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var once = require('events').EventEmitter.prototype.once;
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var stream = new MockWritableStream();
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var _ = require('lodash');
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var utils = require('../../../src/lib/utils');
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var expect = require('expect.js');
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var parentLog;
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var stub = require('../../utils/auto_release_stub').make();
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beforeEach(function() {
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stub(stream, 'write');
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stub(stream, 'end');
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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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utils.clearWriteStreamBuffer(stream);
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});
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function makeLogger(parent, levels) {
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parent = parent || parentLog;
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var config = {
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levels: Log.parseLevels(levels || 'trace'),
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stream: stream,
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};
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return new StreamLogger(parent, config);
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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 logger = makeLogger();
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var line =
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'This string is written 10 times to create buffered output\n';
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// get the last handler for process's "exit" event
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var exitHandlers = process._events.exit;
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var exitHandler = _.isArray(exitHandlers)
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? _.last(exitHandlers)
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: exitHandlers;
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// allow the logger to acctually write to the stream
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stream.write.restore();
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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 console.error
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var flushedOutput = '';
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stub(console, 'error', function(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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// restore console.error asap.
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console.error.restore();
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// the first line is sent immediately to _write and there is nothing we are not going to worry about it
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expect(flushedOutput).to.match(new RegExp(line));
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expect(flushedOutput.match(new RegExp(line, 'g'))).to.have.length(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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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.throwError();
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});
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}
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});
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});
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