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var fdSlicer = require('../');
var fs = require('fs');
var crypto = require('crypto');
var path = require('path');
var streamEqual = require('stream-equal');
var assert = require('assert');
var Pend = require('pend');
var StreamSink = require('streamsink');
var describe = global.describe;
var it = global.it;
var before = global.before;
var beforeEach = global.beforeEach;
var after = global.after;
var testBlobFile = path.join(__dirname, "test-blob.bin");
var testBlobFileSize = 20 * 1024 * 1024;
var testOutBlobFile = path.join(__dirname, "test-blob-out.bin");
describe("FdSlicer", function() {
before(function(done) {
var out = fs.createWriteStream(testBlobFile);
for (var i = 0; i < testBlobFileSize / 1024; i += 1) {
out.write(crypto.pseudoRandomBytes(1024));
}
out.end();
out.on('close', done);
});
beforeEach(function() {
try {
fs.unlinkSync(testOutBlobFile);
} catch (err) {
}
});
after(function() {
try {
fs.unlinkSync(testBlobFile);
fs.unlinkSync(testOutBlobFile);
} catch (err) {
}
});
it("reads a 20MB file (autoClose on)", function(done) {
fs.open(testBlobFile, 'r', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd, {autoClose: true});
var actualStream = slicer.createReadStream();
var expectedStream = fs.createReadStream(testBlobFile);
var pend = new Pend();
pend.go(function(cb) {
slicer.on('close', cb);
});
pend.go(function(cb) {
streamEqual(expectedStream, actualStream, function(err, equal) {
if (err) return done(err);
assert.ok(equal);
cb();
});
});
pend.wait(done);
});
});
it("reads 4 chunks simultaneously", function(done) {
fs.open(testBlobFile, 'r', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd);
var actualPart1 = slicer.createReadStream({start: testBlobFileSize * 0/4, end: testBlobFileSize * 1/4});
var actualPart2 = slicer.createReadStream({start: testBlobFileSize * 1/4, end: testBlobFileSize * 2/4});
var actualPart3 = slicer.createReadStream({start: testBlobFileSize * 2/4, end: testBlobFileSize * 3/4});
var actualPart4 = slicer.createReadStream({start: testBlobFileSize * 3/4, end: testBlobFileSize * 4/4});
var expectedPart1 = slicer.createReadStream({start: testBlobFileSize * 0/4, end: testBlobFileSize * 1/4});
var expectedPart2 = slicer.createReadStream({start: testBlobFileSize * 1/4, end: testBlobFileSize * 2/4});
var expectedPart3 = slicer.createReadStream({start: testBlobFileSize * 2/4, end: testBlobFileSize * 3/4});
var expectedPart4 = slicer.createReadStream({start: testBlobFileSize * 3/4, end: testBlobFileSize * 4/4});
var pend = new Pend();
pend.go(function(cb) {
streamEqual(expectedPart1, actualPart1, function(err, equal) {
assert.ok(equal);
cb(err);
});
});
pend.go(function(cb) {
streamEqual(expectedPart2, actualPart2, function(err, equal) {
assert.ok(equal);
cb(err);
});
});
pend.go(function(cb) {
streamEqual(expectedPart3, actualPart3, function(err, equal) {
assert.ok(equal);
cb(err);
});
});
pend.go(function(cb) {
streamEqual(expectedPart4, actualPart4, function(err, equal) {
assert.ok(equal);
cb(err);
});
});
pend.wait(function(err) {
if (err) return done(err);
fs.close(fd, done);
});
});
});
it("writes a 20MB file (autoClose on)", function(done) {
fs.open(testOutBlobFile, 'w', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd, {autoClose: true});
var actualStream = slicer.createWriteStream();
var inStream = fs.createReadStream(testBlobFile);
slicer.on('close', function() {
var expected = fs.createReadStream(testBlobFile);
var actual = fs.createReadStream(testOutBlobFile);
streamEqual(expected, actual, function(err, equal) {
if (err) return done(err);
assert.ok(equal);
done();
});
});
inStream.pipe(actualStream);
});
});
it("writes 4 chunks simultaneously", function(done) {
fs.open(testOutBlobFile, 'w', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd);
var actualPart1 = slicer.createWriteStream({start: testBlobFileSize * 0/4});
var actualPart2 = slicer.createWriteStream({start: testBlobFileSize * 1/4});
var actualPart3 = slicer.createWriteStream({start: testBlobFileSize * 2/4});
var actualPart4 = slicer.createWriteStream({start: testBlobFileSize * 3/4});
var in1 = fs.createReadStream(testBlobFile, {start: testBlobFileSize * 0/4, end: testBlobFileSize * 1/4});
var in2 = fs.createReadStream(testBlobFile, {start: testBlobFileSize * 1/4, end: testBlobFileSize * 2/4});
var in3 = fs.createReadStream(testBlobFile, {start: testBlobFileSize * 2/4, end: testBlobFileSize * 3/4});
var in4 = fs.createReadStream(testBlobFile, {start: testBlobFileSize * 3/4, end: testBlobFileSize * 4/4});
var pend = new Pend();
pend.go(function(cb) {
actualPart1.on('finish', cb);
});
pend.go(function(cb) {
actualPart2.on('finish', cb);
});
pend.go(function(cb) {
actualPart3.on('finish', cb);
});
pend.go(function(cb) {
actualPart4.on('finish', cb);
});
in1.pipe(actualPart1);
in2.pipe(actualPart2);
in3.pipe(actualPart3);
in4.pipe(actualPart4);
pend.wait(function() {
fs.close(fd, function(err) {
if (err) return done(err);
var expected = fs.createReadStream(testBlobFile);
var actual = fs.createReadStream(testOutBlobFile);
streamEqual(expected, actual, function(err, equal) {
if (err) return done(err);
assert.ok(equal);
done();
});
});
});
});
});
it("throws on invalid ref", function(done) {
fs.open(testOutBlobFile, 'w', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd, {autoClose: true});
assert.throws(function() {
slicer.unref();
}, /invalid unref/);
fs.close(fd, done);
});
});
it("write stream emits error when max size exceeded", function(done) {
fs.open(testOutBlobFile, 'w', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd, {autoClose: true});
var ws = slicer.createWriteStream({start: 0, end: 1000});
ws.on('error', function(err) {
assert.strictEqual(err.code, 'ETOOBIG');
slicer.on('close', done);
});
ws.end(new Buffer(1001));
});
});
it("write stream does not emit error when max size not exceeded", function(done) {
fs.open(testOutBlobFile, 'w', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd, {autoClose: true});
var ws = slicer.createWriteStream({end: 1000});
slicer.on('close', done);
ws.end(new Buffer(1000));
});
});
it("write stream start and end work together", function(done) {
fs.open(testOutBlobFile, 'w', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd, {autoClose: true});
var ws = slicer.createWriteStream({start: 1, end: 1000});
ws.on('error', function(err) {
assert.strictEqual(err.code, 'ETOOBIG');
slicer.on('close', done);
});
ws.end(new Buffer(1000));
});
});
it("write stream emits progress events", function(done) {
fs.open(testOutBlobFile, 'w', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd, {autoClose: true});
var ws = slicer.createWriteStream();
var progressEventCount = 0;
var prevBytesWritten = 0;
ws.on('progress', function() {
progressEventCount += 1;
assert.ok(ws.bytesWritten > prevBytesWritten);
prevBytesWritten = ws.bytesWritten;
});
slicer.on('close', function() {
assert.ok(progressEventCount > 5);
done();
});
for (var i = 0; i < 10; i += 1) {
ws.write(new Buffer(16 * 1024 * 2));
}
ws.end();
});
});
it("write stream unrefs when destroyed", function(done) {
fs.open(testOutBlobFile, 'w', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd, {autoClose: true});
var ws = slicer.createWriteStream();
slicer.on('close', done);
ws.write(new Buffer(1000));
ws.destroy();
});
});
it("read stream unrefs when destroyed", function(done) {
fs.open(testBlobFile, 'r', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd, {autoClose: true});
var rs = slicer.createReadStream();
rs.on('error', function(err) {
assert.strictEqual(err.message, "stream destroyed");
slicer.on('close', done);
});
rs.destroy();
});
});
it("fdSlicer.read", function(done) {
fs.open(testBlobFile, 'r', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd);
var outBuf = new Buffer(1024);
slicer.read(outBuf, 0, 10, 0, function(err, bytesRead, buf) {
assert.strictEqual(bytesRead, 10);
fs.close(fd, done);
});
});
});
it("fdSlicer.write", function(done) {
fs.open(testOutBlobFile, 'w', function(err, fd) {
if (err) return done(err);
var slicer = fdSlicer.createFromFd(fd);
slicer.write(new Buffer("blah\n"), 0, 5, 0, function() {
if (err) return done(err);
fs.close(fd, done);
});
});
});
});
describe("BufferSlicer", function() {
it("invalid ref", function() {
var slicer = fdSlicer.createFromBuffer(new Buffer(16));
slicer.ref();
slicer.unref();
assert.throws(function() {
slicer.unref();
}, /invalid unref/);
});
it("read and write", function(done) {
var buf = new Buffer("through the tangled thread the needle finds its way");
var slicer = fdSlicer.createFromBuffer(buf);
var outBuf = new Buffer(1024);
slicer.read(outBuf, 10, 11, 8, function(err) {
if (err) return done(err);
assert.strictEqual(outBuf.toString('utf8', 10, 21), "the tangled");
slicer.write(new Buffer("derp"), 0, 4, 7, function(err) {
if (err) return done(err);
assert.strictEqual(buf.toString('utf8', 7, 19), "derp tangled");
done();
});
});
});
it("createReadStream", function(done) {
var str = "I never conquered rarely came, 16 just held such better days";
var buf = new Buffer(str);
var slicer = fdSlicer.createFromBuffer(buf);
var inStream = slicer.createReadStream();
var sink = new StreamSink();
inStream.pipe(sink);
sink.on('finish', function() {
assert.strictEqual(sink.toString(), str);
inStream.destroy();
done();
});
});
it("createWriteStream exceed buffer size", function(done) {
var slicer = fdSlicer.createFromBuffer(new Buffer(4));
var outStream = slicer.createWriteStream();
outStream.on('error', function(err) {
assert.strictEqual(err.code, 'ETOOBIG');
done();
});
outStream.write("hi!\n");
outStream.write("it warked\n");
outStream.end();
});
it("createWriteStream ok", function(done) {
var buf = new Buffer(1024);
var slicer = fdSlicer.createFromBuffer(buf);
var outStream = slicer.createWriteStream();
outStream.on('finish', function() {
assert.strictEqual(buf.toString('utf8', 0, "hi!\nit warked\n".length), "hi!\nit warked\n");
outStream.destroy();
done();
});
outStream.write("hi!\n");
outStream.write("it warked\n");
outStream.end();
});
});
|
