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