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