Working version of fully-async log rolling file appender - tests need fixing though
This commit is contained in:
Gareth Jones
130
test/bufferedStream.js
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130
test/bufferedStream.js
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var vows = require('vows')
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, assert = require('assert')
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, events = require('events')
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, BufferedWriteStream = require('../lib/streams').BufferedWriteStream;
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function FakeStream() {
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this.writes = [];
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this.canWrite = false;
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this.callbacks = {};
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}
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FakeStream.prototype.on = function(event, callback) {
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this.callbacks[event] = callback;
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}
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FakeStream.prototype.write = function(data, encoding) {
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assert.equal("utf8", encoding);
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this.writes.push(data);
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return this.canWrite;
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}
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FakeStream.prototype.emit = function(event, payload) {
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this.callbacks[event](payload);
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}
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FakeStream.prototype.block = function() {
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this.canWrite = false;
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}
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FakeStream.prototype.unblock = function() {
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this.canWrite = true;
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this.emit("drain");
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}
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vows.describe('BufferedWriteStream').addBatch({
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'stream': {
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topic: new BufferedWriteStream(new FakeStream()),
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'should take a stream as an argument and return a stream': function(stream) {
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assert.instanceOf(stream, events.EventEmitter);
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}
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},
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'before stream is open': {
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topic: function() {
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var fakeStream = new FakeStream(),
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stream = new BufferedWriteStream(fakeStream);
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stream.write("Some data", "utf8");
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stream.write("Some more data", "utf8");
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return fakeStream.writes;
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},
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'should buffer writes': function(writes) {
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assert.equal(writes.length, 0);
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}
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},
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'when stream is open': {
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topic: function() {
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var fakeStream = new FakeStream(),
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stream = new BufferedWriteStream(fakeStream);
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stream.write("Some data", "utf8");
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fakeStream.canWrite = true;
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fakeStream.emit("open");
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stream.write("Some more data", "utf8");
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return fakeStream.writes;
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},
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'should write data to stream from before stream was open': function (writes) {
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assert.equal(writes[0], "Some data");
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},
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'should write data to stream from after stream was open': function (writes) {
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assert.equal(writes[1], "Some more data");
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}
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},
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'when stream is blocked': {
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topic: function() {
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var fakeStream = new FakeStream(),
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stream = new BufferedWriteStream(fakeStream);
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fakeStream.emit("open");
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fakeStream.block();
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stream.write("will not know it is blocked until first write", "utf8");
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stream.write("so this one will be buffered, but not the previous one", "utf8");
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return fakeStream.writes;
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},
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'should buffer writes': function (writes) {
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assert.equal(writes.length, 1);
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assert.equal(writes[0], "will not know it is blocked until first write");
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}
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},
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'when stream is unblocked': {
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topic: function() {
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var fakeStream = new FakeStream(),
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stream = new BufferedWriteStream(fakeStream);
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fakeStream.emit("open");
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fakeStream.block();
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stream.write("will not know it is blocked until first write", "utf8");
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stream.write("so this one will be buffered, but not the previous one", "utf8");
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fakeStream.unblock();
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return fakeStream.writes;
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},
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'should send buffered data': function (writes) {
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assert.equal(writes.length, 2);
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assert.equal(writes[1], "so this one will be buffered, but not the previous one");
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}
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},
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'when stream is closed': {
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topic: function() {
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var fakeStream = new FakeStream(),
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stream = new BufferedWriteStream(fakeStream);
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fakeStream.emit("open");
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fakeStream.block();
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stream.write("first write to notice stream is blocked", "utf8");
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stream.write("data while blocked", "utf8");
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stream.end();
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return fakeStream.writes;
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},
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'should send any buffered writes to the stream': function (writes) {
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assert.equal(writes.length, 2);
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assert.equal(writes[1], "data while blocked");
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}
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},
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'when stream errors': {
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topic: function() {
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var fakeStream = new FakeStream(),
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stream = new BufferedWriteStream(fakeStream);
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stream.on("error", this.callback);
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fakeStream.emit("error", "oh noes!");
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},
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'should emit error': function(err, value) {
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assert.equal(err, "oh noes!");
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}
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}
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}).exportTo(module);
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118
test/rollingFileStream.js
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118
test/rollingFileStream.js
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@@ -0,0 +1,118 @@
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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() { 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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var that = this;
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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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stream.end(function (err) {
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fs.readFile(__dirname + "/test-rolling-file-stream-write-more", "utf8", that.callback);
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});
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},
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'should write to the file': function(contents) {
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assert.equal(contents, "5.cheese\n6.cheese\n");
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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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}
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}
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}).exportTo(module);
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