127 lines
4.9 KiB
JavaScript
127 lines
4.9 KiB
JavaScript
var vows = require('vows')
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, assert = require('assert')
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, events = require('events')
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, fs = require('fs')
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, RollingFileStream = require('../../lib/streams').RollingFileStream;
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function remove(filename) {
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try {
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fs.unlinkSync(filename);
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} catch (e) {
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//doesn't really matter if it failed
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}
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}
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vows.describe('RollingFileStream').addBatch({
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'arguments': {
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topic: function() {
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remove(__dirname + "/test-rolling-file-stream");
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return new RollingFileStream("test-rolling-file-stream", 1024, 5);
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},
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'should take a filename, file size in bytes, number of backups as arguments and return a FileWriteStream': function(stream) {
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assert.instanceOf(stream, fs.FileWriteStream);
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assert.equal(stream.filename, "test-rolling-file-stream");
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assert.equal(stream.size, 1024);
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assert.equal(stream.backups, 5);
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},
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'with default settings for the underlying stream': function(stream) {
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assert.equal(stream.mode, 420);
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assert.equal(stream.flags, 'a');
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assert.equal(stream.encoding, 'utf8');
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}
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},
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'with stream arguments': {
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topic: function() {
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remove(__dirname + '/test-rolling-file-stream');
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return new RollingFileStream('test-rolling-file-stream', 1024, 5, { mode: 0666 });
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},
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'should pass them to the underlying stream': function(stream) {
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assert.equal(stream.mode, 0666);
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}
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},
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'without size': {
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topic: function() {
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try {
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new RollingFileStream(__dirname + "/test-rolling-file-stream");
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} catch (e) {
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return e;
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}
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},
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'should throw an error': function(err) {
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assert.instanceOf(err, Error);
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}
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},
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'without number of backups': {
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topic: function() {
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remove('test-rolling-file-stream');
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return new RollingFileStream(__dirname + "/test-rolling-file-stream", 1024);
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},
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'should default to 1 backup': function(stream) {
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assert.equal(stream.backups, 1);
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}
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},
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'writing less than the file size': {
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topic: function() {
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remove(__dirname + "/test-rolling-file-stream-write-less");
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var that = this, stream = new RollingFileStream(__dirname + "/test-rolling-file-stream-write-less", 100);
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stream.on("open", function() { that.callback(null, stream); });
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},
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'(when open)': {
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topic: function(stream) {
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stream.write("cheese", "utf8");
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stream.end();
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fs.readFile(__dirname + "/test-rolling-file-stream-write-less", "utf8", this.callback);
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},
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'should write to the file': function(contents) {
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assert.equal(contents, "cheese");
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},
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'the number of files': {
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topic: function() {
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fs.readdir(__dirname, this.callback);
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},
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'should be one': function(files) {
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assert.equal(files.filter(function(file) { return file.indexOf('test-rolling-file-stream-write-less') > -1; }).length, 1);
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}
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}
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}
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},
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'writing more than the file size': {
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topic: function() {
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remove(__dirname + "/test-rolling-file-stream-write-more");
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remove(__dirname + "/test-rolling-file-stream-write-more.1");
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var that = this, stream = new RollingFileStream(__dirname + "/test-rolling-file-stream-write-more", 45);
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stream.on("open", function() {
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for (var i=0; i < 7; i++) {
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stream.write(i +".cheese\n", "utf8");
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}
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//wait for the file system to catch up with us
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setTimeout(that.callback, 100);
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});
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},
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'the number of files': {
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topic: function() {
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fs.readdir(__dirname, this.callback);
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},
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'should be two': function(files) {
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assert.equal(files.filter(function(file) { return file.indexOf('test-rolling-file-stream-write-more') > -1; }).length, 2);
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}
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},
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'the first file': {
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topic: function() {
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fs.readFile(__dirname + "/test-rolling-file-stream-write-more", "utf8", this.callback);
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},
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'should contain the last two log messages': function(contents) {
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assert.equal(contents, '5.cheese\n6.cheese\n');
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}
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},
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'the second file': {
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topic: function() {
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fs.readFile(__dirname + '/test-rolling-file-stream-write-more.1', "utf8", this.callback);
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},
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'should contain the first five log messages': function(contents) {
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assert.equal(contents, '0.cheese\n1.cheese\n2.cheese\n3.cheese\n4.cheese\n');
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}
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}
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}
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}).exportTo(module);
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