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test.js
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test.js
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/*
* Copyright (C) 2019 Andras Radics
* Licensed under the Apache License, Version 2.0
*/
'use strict';
var SysBuffer = require('buffer').Buffer;
var OBuffer = require('./');
var nodeVersion = parseInt(process.version.slice(1));
var realVersion = process.version;
OBuffer.install();
module.exports = {
tearDown: function(done) {
setVersion(realVersion);
done();
},
'should uninstall': function(t) {
OBuffer.uninstall();
t.equal(Buffer, SysBuffer);
OBuffer.install();
t.done();
},
'should install': function(t) {
OBuffer.uninstall();
OBuffer.install();
t.equal(Buffer, OBuffer);
t.done();
},
'should construct Buffer from string': function(t) {
var buf = new OBuffer("hello");
t.ok(buf instanceof SysBuffer);
t.ok(buf instanceof OBuffer);
t.ok(buf instanceof SysBuffer);
t.done();
},
'should construct Buffer as a function': function(t) {
var buf = OBuffer("hello");
t.ok(buf instanceof SysBuffer);
t.ok(buf instanceof Buffer);
t.ok(buf instanceof OBuffer);
t.done();
},
'should return length': function(t) {
t.equal(OBuffer("hi").length, 2);
t.equal(OBuffer(4).length, 4);
t.done();
},
'should expose Buffer class methods': function(t) {
for (var name in SysBuffer) {
// the factory methods have been polyfilled
if (name in { from: 1, alloc: 1, allocUnsafe: 1, concat: 1, allocUnsafeSlow: 1 }) continue;
if (typeof SysBuffer[name] === 'function') t.equal(OBuffer[name], SysBuffer[name]);
}
t.done();
},
'should create by count': function(t) {
var buf = Buffer(234);
t.ok(buf instanceof SysBuffer);
t.equal(buf.length, 234);
t.done();
},
'should create by string': function(t) {
var buf = new Buffer("hello");
t.equal(buf.length, 5);
t.equal(buf[1], 'e'.charCodeAt(0));
var buf = new Buffer("1234", 'hex');
t.equal(buf.length, 2);
t.equal(buf[0], 0x12);
t.done();
},
'should create by Array': function(t) {
var buf = new Buffer([1, 2, 3]);
t.equal(buf.length, 3);
t.equal(buf[1], 2);
t.equal(buf[2], 3);
var buf = new Buffer([]);
t.equal(buf.length, 0);
var buf = new Buffer([1234]);
t.equal(buf.length, 1);
t.equal(buf[0], 1234 & 0xFF);
t.done();
},
'should create by Buffer': function(t) {
var buf = Buffer([1, 2]);
var buf2 = new Buffer(buf);
t.notEqual(buf2, buf);
t.equal(buf2.length, 2);
t.equal(buf2[0], 1);
t.equal(buf2[1], 2);
t.done();
},
'should require constructor argument': function(t) {
if (nodeVersion <= 5 || nodeVersion >= 10) t.skip();
// before factory methods
t.unrequire('./');
setVersion('v5.8.0');
var Buff = require('./');
t.throws(function() { new Buff() });
t.unrequire('./');
setVersion('v8.11.4');
var Buff = require('./');
t.throws(function() { new Buff() });
// after deprecation
t.unrequire('./');
setVersion('v11.0.0');
var Buff = require('./');
t.throws(function() { new Buff() });
t.done();
},
'edge cases': {
setUp: function(done) {
this.savedMethods = {};
for (var k in SysBuffer) {
Object.defineProperty(this.savedMethods, k, Object.getOwnPropertyDescriptor(SysBuffer, k));
}
done();
},
tearDown: function(done) {
for (var k in this.savedMethods) Object.defineProperty(SysBuffer, k, Object.getOwnPropertyDescriptor(this.savedMethods, k));
done();
},
'should throw with no args': function(t) {
t.throws(function(){ OBuffer() }, /must|needs/);
t.done();
},
'should use polyfills as necessary': function(t) {
// test polyfill handling and coverage by faking the node version
// the version trick will work with node v6-v9, or v10-v11 with deprecation warnings
if (nodeVersion <= 5 || nodeVersion >= 10) t.skip();
// before factory methods
setVersion('v5.8.0');
t.unrequire('./');
var OBuff = require('./');
testPolyfill(OBuff);
// with both
setVersion('v9.8.0');
t.unrequire('./');
var OBuff = require('./');
testPolyfill(OBuff);
// after deprecation
setVersion('v11.0.0');
t.unrequire('./');
var OBuff = require('./');
testPolyfill(OBuff);
function testPolyfill(OBuffer) {
var tempVersion = parseInt(process.version.slice(1));
t.ok(typeof OBuffer.from === 'function');
t.ok(typeof OBuffer.alloc === 'function');
t.ok(typeof OBuffer.allocUnsafe === 'function');
t.ok(OBuffer.from != SysBuffer.from);
t.ok(OBuffer.alloc != SysBuffer.alloc);
t.ok(OBuffer.allocUnsafe != SysBuffer.allocUnsafe);
var buf = OBuffer.from("hello");
t.ok(buf instanceof SysBuffer);
t.deepEqual(buf, new OBuffer("hello"));
var emptyBuf = new OBuffer(7); emptyBuf.fill(0);
var buf = OBuffer.alloc(7);
t.ok(buf instanceof SysBuffer);
t.deepEqual(buf, emptyBuf);
var buf = OBuffer.allocUnsafe(7);
t.ok(buf instanceof SysBuffer);
t.equal(buf.length, 7);
var buf = OBuffer.from(makeSysBuffer(""));
t.ok(buf instanceof SysBuffer);
t.equal(buf.length, 0);
var buf = OBuffer.from("");
t.ok(buf instanceof SysBuffer);
t.equal(buf.length, 0);
var buf = OBuffer.alloc(0);
t.ok(buf instanceof SysBuffer);
t.equal(buf.length, 0);
var buf = OBuffer.allocUnsafe(0);
t.ok(buf instanceof SysBuffer);
t.equal(buf.length, 0);
OBuffer.safe = true;
var buf = new OBuffer(777);
t.equal(buf.length, 777);
for (var i=0; i<777; i++) t.equal(buf[i], 0);
var buf = new OBuffer([0x41, 0x42, 0x43]);
t.equal(buf.toString(), "ABC");
var arr = new ArrayBuffer(7);
var buf = new OBuffer(arr, 0, 5);
for (var i=0; i<7; i++) buf[i] = 65 + i;
t.equal(buf.toString(), "ABCDE");
var buf2 = makeSysBuffer(buf);
t.equal(buf2.toString(), "ABCDE");
// FIXME: what should arr convert to after was modified? getting len 5 string
// var buf3 = new OBuffer(arr, 0, 7);
// t.equal(buf2.toString().length, "ABCDE");
var buf = new OBuffer(new OBuffer("ABC"));
t.equal(buf.toString(), "ABC");
t.throws(function() { new OBuffer(/^/) });
}
t.done();
},
'should wrapper builders': function(t) {
OBuffer.uninstall();
setVersion('v5.8.0');
t.unrequire('./');
var OBuff = require('./');
if (SysBuffer.concat) {
t.ok(!OBuff.allocUnsafeSlow);
var buf = OBuff.concat([makeSysBuffer('A'), makeSysBuffer('B')]);
t.ok(buf instanceof OBuff);
t.ok(buf instanceof Buffer);
}
// note: spoofing node-v6,7,8,9 can result in a deprecation warning
setVersion('v10.8.0');
t.unrequire('./');
var OBuff = require('./');
if (SysBuffer.allocUnsafeSlow) {
t.ok(typeof OBuff.allocUnsafeSlow === 'function');
t.ok(OBuff.allocUnsafeSlow(0) instanceof OBuff);
}
if (SysBuffer.concat) {
OBuff.install();
t.ok(Buffer.concat([makeSysBuffer('A'), makeSysBuffer('B')]) instanceof OBuff);
}
OBuffer.install();
t.done();
},
'makes only Buffer instances into OBuffer': function(t) {
OBuffer.install();
var obj = new Date();
// OBuffer.concat calls Buffer.concat and patches the result Buffer
t.stubOnce(SysBuffer, 'concat', function() { return obj });
if (SysBuffer.concat) {
var buf = Buffer.concat([new Buffer('A'), new Buffer('B')]);
t.ok(!(buf instanceof OBuffer));
t.equal(buf, obj);
}
t.done();
},
},
'interoperability': {
'should concat Buffers': function(t) {
if (SysBuffer.concat) {
var buf = OBuffer.concat([new Buffer("A"), makeSysBuffer("B"), new OBuffer("C")]);
t.equal(buf.toString(), "ABC");
t.ok(buf instanceof SysBuffer);
t.ok(buf instanceof Buffer);
t.ok(buf instanceof OBuffer);
}
t.done();
},
'should access contents with subscript notation': function(t) {
var buf = OBuffer("ABC");
t.equal(buf.length, 3);
t.equal(buf[0], 65);
t.equal(buf[1], 66);
t.equal(buf[2], 67);
t.done();
},
'should run swap16': function(t) {
var buf = OBuffer([1, 2, 3, 4]);
if (buf.swap16) t.equal(buf.swap16(), buf);
t.done();
},
'should slice like Buffer': function(t) {
var buf;
buf = OBuffer("hello").slice(2, 4);
t.equal(buf.toString(), "ll");
t.ok(buf instanceof SysBuffer);
t.ok(buf instanceof OBuffer);
buf = OBuffer("hello").slice(1);
t.equal(String(buf), "ello");
buf = OBuffer("hello").slice(0);
t.equal(buf + '', "hello");
t.done();
},
'should support byteLength': function(t) {
t.equal(OBuffer.byteLength("hi\u9876"), 5);
t.done();
},
'should support keys and values': function(t) {
var buf = OBuffer("ABCD");
t.equal(buf.length, 4);
var keys = [], values = [];
// keys and values return iterators, which need for..of, introduced in 0.12
try { eval("for (var key of buf.keys()) keys.push(key);") } catch (e) { }
try { eval("for (var value of buf.values()) values.push(key);") } catch (e) { }
if (keys.length > 0) t.deepEqual(keys, [0, 1, 2, 3]);
if (values.length > 0) t.deepEqual(values, [65, 66, 67, 68]);
t.done();
},
'should support read and write': function(t) {
var buf = new OBuffer("oh hello world, have a good day.");
t.equal(buf.write("hit", 3, 2, 'utf8'), 2);
t.equal(buf.slice(1, 8).toString(), 'h hillo');
t.equal(buf.toString(undefined, 3, 3+2), 'hi');
buf.writeDoubleBE(1e6, 1);
t.equal(buf.readDoubleBE(1), 1e6);
t.done();
},
'should support toJSON': function(t) {
var buf = OBuffer([1, 2]);
if (!buf.toJSON && nodeVersion < 1) t.skip(); // not in node-v0.8
var json = buf.toJSON();
t.equal(typeof json, 'object');
if (json.type) t.deepEqual(json, { type: 'Buffer', data: [1, 2] }); // node-v0.11
else t.deepEqual(json, [1, 2]); // node-v0.10
t.done();
},
},
'speed OBuffer': {
setUp: function(done) {
this.Buffer = OBuffer;
done();
},
'create new 100k': function(t) {
for (var x, i=0; i<100000; i++) x = new this.Buffer(10);
// Buffer is 45% faster than OBuffer
t.done();
},
'iterate 10m': function(t) {
var len = 100, buf = new this.Buffer(len);
for (var x, i=0; i<100000; i++) for (var j=0; j<len; j++) x = buf[j];
// same speed
t.done();
},
'for..of 10m': function(t) {
if (nodeVersion < 4) t.skip();
var x, buf = new this.Buffer(100);
eval("for (var i=0; i<100000; i++) for (var v of buf) x = v;");
// same speed
t.done();
},
'slice 100k': function(t) {
var x, buf = new this.Buffer(100);
for (var i=0; i<100000; i++) x = buf.slice(i % 100);
// Buffer is 135% faster than OBuffer (unoptimized __proto__)
t.done();
},
},
}
// run the OBuffer speed tests on Buffers too
// Note: this will print a deprecation warning on node-v10 and up.
if (nodeVersion < 10) {
module.exports['speed Buffer'] = _copyObject({}, module.exports['speed OBuffer']);
module.exports['speed Buffer'].setUp = function(done) { this.Buffer = SysBuffer; done() };
}
function _copyObject(to, from) {
for (var k in from) to[k] = from[k];
return to;
}
function makeSysBuffer(a, b, c) {
// node-v4.4 and v5.8 had a weird from() that broke on strings with "not a typed array" error
// all node versions mis-handle Buffer(new Number(1)) and Buffer.alloc(new Number(1)):
// 0.10, 0.11 and 0.12 alloc 0 bytes, 4.4 on up throw an error
if (nodeVersion < 10) return new SysBuffer(a, b, c);
return (typeof a === 'number') ? SysBuffer.alloc(a) : SysBuffer.from(a, b, c);
}
function setVersion(ver) {
Object.defineProperty(process, 'version', { value: ver });
}