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86 lines
1.8 KiB
86 lines
1.8 KiB
4 years ago
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if (process.env.OBJECT_IMPL) global.TYPED_ARRAY_SUPPORT = false
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var B = require('../').Buffer
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var test = require('tape')
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test('instanceof Buffer', function (t) {
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var buf = new B([1, 2])
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t.ok(buf instanceof B)
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t.end()
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})
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test('convert to Uint8Array in modern browsers', function (t) {
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if (B.TYPED_ARRAY_SUPPORT) {
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var buf = new B([1, 2])
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var uint8array = new Uint8Array(buf.buffer)
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t.ok(uint8array instanceof Uint8Array)
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t.equal(uint8array[0], 1)
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t.equal(uint8array[1], 2)
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} else {
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t.pass('object impl: skipping test')
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}
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t.end()
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})
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test('indexes from a string', function (t) {
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var buf = new B('abc')
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t.equal(buf[0], 97)
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t.equal(buf[1], 98)
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t.equal(buf[2], 99)
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t.end()
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})
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test('indexes from an array', function (t) {
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var buf = new B([ 97, 98, 99 ])
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t.equal(buf[0], 97)
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t.equal(buf[1], 98)
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t.equal(buf[2], 99)
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t.end()
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})
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test('setting index value should modify buffer contents', function (t) {
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var buf = new B([ 97, 98, 99 ])
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t.equal(buf[2], 99)
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t.equal(buf.toString(), 'abc')
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buf[2] += 10
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t.equal(buf[2], 109)
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t.equal(buf.toString(), 'abm')
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t.end()
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})
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test('storing negative number should cast to unsigned', function (t) {
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var buf = new B(1)
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if (B.TYPED_ARRAY_SUPPORT) {
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// This does not work with the object implementation -- nothing we can do!
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buf[0] = -3
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t.equal(buf[0], 253)
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}
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buf = new B(1)
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buf.writeInt8(-3, 0)
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t.equal(buf[0], 253)
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t.end()
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})
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test('test that memory is copied from array-like', function (t) {
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if (B.TYPED_ARRAY_SUPPORT) {
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var u = new Uint8Array(4)
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var b = new B(u)
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b[0] = 1
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b[1] = 2
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b[2] = 3
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b[3] = 4
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t.equal(u[0], 0)
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t.equal(u[1], 0)
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t.equal(u[2], 0)
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t.equal(u[3], 0)
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} else {
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t.pass('object impl: skipping test')
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}
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t.end()
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})
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