linx-simulator2/node_modules/ref/test/reinterpretUntilZeros.js
2019-09-18 11:11:16 +03:00

46 lines
1.5 KiB
JavaScript

var fs = require('fs')
var assert = require('assert')
var weak = require('weak')
var ref = require('../')
describe('reinterpretUntilZeros()', function () {
beforeEach(gc)
it('should return a new Buffer instance up until the first 0', function () {
var buf = new Buffer('hello\0world')
var buf2 = buf.reinterpretUntilZeros(1)
assert.equal(buf2.length, 'hello'.length)
assert.equal(buf2.toString(), 'hello')
})
it('should return a new Buffer instance up until the first 0 starting from offset', function () {
var buf = new Buffer('hello\0world')
var buf2 = buf.reinterpretUntilZeros(1, 3)
assert.equal(buf2.length, 'lo'.length)
assert.equal(buf2.toString(), 'lo')
})
it('should return a new Buffer instance up until the first 2-byte sequence of 0s', function () {
var str = 'hello world'
var buf = new Buffer(50)
var len = buf.write(str, 'ucs2')
buf.writeInt16LE(0, len) // NULL terminate the string
var buf2 = buf.reinterpretUntilZeros(2)
assert.equal(str.length, buf2.length / 2)
assert.equal(buf2.toString('ucs2'), str)
})
it('should return a large Buffer instance > 10,000 bytes with UTF16-LE char bytes', function () {
var data = fs.readFileSync(__dirname + '/utf16le.bin');
var strBuf = ref.reinterpretUntilZeros(data, 2);
assert(strBuf.length > 10000);
var str = strBuf.toString('ucs2');
// the data in `utf16le.bin` should be a JSON parsable string
assert(JSON.parse(str));
})
})