58 lines
1.3 KiB
JavaScript
58 lines
1.3 KiB
JavaScript
var Buffer = require('buffer').Buffer
|
|
var test = require('tape')
|
|
|
|
var toArrayBuffer = require('.')
|
|
|
|
function elementsEqual (ab, buffer) {
|
|
var view = new Uint8Array(ab)
|
|
for (var i = 0; i < view.length; i++) {
|
|
if (view[i] !== buffer[i]) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
test('Basic behavior', function (t) {
|
|
var buf = new Buffer(10)
|
|
for (var i = 0; i < 10; i++) {
|
|
buf[i] = i
|
|
}
|
|
|
|
var ab = toArrayBuffer(buf)
|
|
|
|
t.equals(ab.byteLength, 10, 'correct length')
|
|
t.ok(elementsEqual(ab, buf), 'elements equal')
|
|
t.end()
|
|
})
|
|
|
|
test('Behavior when input is a subarray 1', function (t) {
|
|
var origBuf = new Buffer(10)
|
|
for (var i = 0; i < 10; i++) {
|
|
origBuf[i] = i
|
|
}
|
|
var buf = origBuf.slice(1)
|
|
|
|
var ab = toArrayBuffer(buf)
|
|
|
|
t.equals(ab.byteLength, 9, 'correct length')
|
|
t.ok(elementsEqual(ab, buf), 'elements equal')
|
|
t.notOk(ab === buf.buffer, 'the underlying ArrayBuffer is not returned when incorrect')
|
|
t.end()
|
|
})
|
|
|
|
test('Behavior when input is a subarray 2', function (t) {
|
|
var origBuf = new Buffer(10)
|
|
for (var i = 0; i < 10; i++) {
|
|
origBuf[i] = i
|
|
}
|
|
var buf = origBuf.slice(0, 9)
|
|
|
|
var ab = toArrayBuffer(buf)
|
|
|
|
t.equals(ab.byteLength, 9, 'correct length')
|
|
t.ok(elementsEqual(ab, buf), 'elements equal')
|
|
t.notOk(ab === buf.buffer, 'the underlying ArrayBuffer is not returned when incorrect')
|
|
t.end()
|
|
})
|