58 lines
2.0 KiB
JavaScript
58 lines
2.0 KiB
JavaScript
|
|
||
|
|
var assert = require('assert')
|
||
|
|
var weak = require('weak')
|
||
|
|
var ref = require('../')
|
||
|
|
|
||
|
|
describe('reinterpret()', function () {
|
||
|
|
|
||
|
|
beforeEach(gc)
|
||
|
|
|
||
|
|
it('should return a new Buffer instance at the same address', function () {
|
||
|
|
var buf = new Buffer('hello world')
|
||
|
|
var small = buf.slice(0, 0)
|
||
|
|
assert.strictEqual(0, small.length)
|
||
|
|
assert.strictEqual(buf.address(), small.address())
|
||
|
|
var reinterpreted = small.reinterpret(buf.length)
|
||
|
|
assert.strictEqual(buf.address(), reinterpreted.address())
|
||
|
|
assert.strictEqual(buf.length, reinterpreted.length)
|
||
|
|
assert.strictEqual(buf.toString(), reinterpreted.toString())
|
||
|
|
})
|
||
|
|
|
||
|
|
it('should return a new Buffer instance starting at the offset address', function () {
|
||
|
|
var buf = new Buffer('hello world')
|
||
|
|
var offset = 3
|
||
|
|
var small = buf.slice(offset, buf.length)
|
||
|
|
assert.strictEqual(buf.length - offset, small.length)
|
||
|
|
assert.strictEqual(buf.address() + offset, small.address())
|
||
|
|
var reinterpreted = buf.reinterpret(small.length, offset)
|
||
|
|
assert.strictEqual(small.address(), reinterpreted.address())
|
||
|
|
assert.strictEqual(small.length, reinterpreted.length)
|
||
|
|
assert.strictEqual(small.toString(), reinterpreted.toString())
|
||
|
|
})
|
||
|
|
|
||
|
|
it('should retain a reference to the original Buffer when reinterpreted', function () {
|
||
|
|
var origGCd = false
|
||
|
|
var otherGCd = false
|
||
|
|
var buf = new Buffer(1)
|
||
|
|
weak(buf, function () { origGCd = true })
|
||
|
|
var other = buf.reinterpret(0)
|
||
|
|
weak(other, function () { otherGCd = true })
|
||
|
|
|
||
|
|
assert(!origGCd, '"buf" has been garbage collected too soon')
|
||
|
|
assert(!otherGCd, '"other" has been garbage collected too soon')
|
||
|
|
|
||
|
|
// try to GC `buf`
|
||
|
|
buf = null
|
||
|
|
gc()
|
||
|
|
assert(!origGCd, '"buf" has been garbage collected too soon')
|
||
|
|
assert(!otherGCd, '"other" has been garbage collected too soon')
|
||
|
|
|
||
|
|
// now GC `other`
|
||
|
|
other = null
|
||
|
|
gc()
|
||
|
|
assert(otherGCd, '"other" has not been garbage collected')
|
||
|
|
assert(origGCd, '"buf" has not been garbage collected')
|
||
|
|
})
|
||
|
|
|
||
|
|
})
|