if (process.env.OBJECT_IMPL) global.TYPED_ARRAY_SUPPORT = false
|
var B = require('../').Buffer
|
var test = require('tape')
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var isnan = require('is-nan')
|
|
test('buffer.write string should get parsed as number', function (t) {
|
var b = new B(64)
|
b.writeUInt16LE('1003', 0)
|
t.equal(b.readUInt16LE(0), 1003)
|
t.end()
|
})
|
|
test('buffer.writeUInt8 a fractional number will get Math.floored', function (t) {
|
// Some extra work is necessary to make this test pass with the Object implementation
|
|
var b = new B(1)
|
b.writeInt8(5.5, 0)
|
t.equal(b[0], 5)
|
t.end()
|
})
|
|
test('writeUint8 with a negative number throws', function (t) {
|
var buf = new B(1)
|
|
t.throws(function () {
|
buf.writeUInt8(-3, 0)
|
})
|
|
t.end()
|
})
|
|
test('hex of write{Uint,Int}{8,16,32}{LE,BE}', function (t) {
|
t.plan(2 * (2 * 2 * 2 + 2))
|
var hex = [
|
'03', '0300', '0003', '03000000', '00000003',
|
'fd', 'fdff', 'fffd', 'fdffffff', 'fffffffd'
|
]
|
var reads = [ 3, 3, 3, 3, 3, -3, -3, -3, -3, -3 ]
|
var xs = ['UInt', 'Int']
|
var ys = [8, 16, 32]
|
for (var i = 0; i < xs.length; i++) {
|
var x = xs[i]
|
for (var j = 0; j < ys.length; j++) {
|
var y = ys[j]
|
var endianesses = (y === 8) ? [''] : ['LE', 'BE']
|
for (var k = 0; k < endianesses.length; k++) {
|
var z = endianesses[k]
|
|
var v1 = new B(y / 8)
|
var writefn = 'write' + x + y + z
|
var val = (x === 'Int') ? -3 : 3
|
v1[writefn](val, 0)
|
t.equal(
|
v1.toString('hex'),
|
hex.shift()
|
)
|
var readfn = 'read' + x + y + z
|
t.equal(
|
v1[readfn](0),
|
reads.shift()
|
)
|
}
|
}
|
}
|
t.end()
|
})
|
|
test('hex of write{Uint,Int}{8,16,32}{LE,BE} with overflow', function (t) {
|
if (!B.TYPED_ARRAY_SUPPORT) {
|
t.pass('object impl: skipping overflow test')
|
t.end()
|
return
|
}
|
|
t.plan(3 * (2 * 2 * 2 + 2))
|
var hex = [
|
'', '03', '00', '030000', '000000',
|
'', 'fd', 'ff', 'fdffff', 'ffffff'
|
]
|
var reads = [
|
undefined, 3, 0, NaN, 0,
|
undefined, 253, -256, 16777213, -256
|
]
|
var xs = ['UInt', 'Int']
|
var ys = [8, 16, 32]
|
for (var i = 0; i < xs.length; i++) {
|
var x = xs[i]
|
for (var j = 0; j < ys.length; j++) {
|
var y = ys[j]
|
var endianesses = (y === 8) ? [''] : ['LE', 'BE']
|
for (var k = 0; k < endianesses.length; k++) {
|
var z = endianesses[k]
|
|
var v1 = new B(y / 8 - 1)
|
var next = new B(4)
|
next.writeUInt32BE(0, 0)
|
var writefn = 'write' + x + y + z
|
var val = (x === 'Int') ? -3 : 3
|
v1[writefn](val, 0, true)
|
t.equal(
|
v1.toString('hex'),
|
hex.shift()
|
)
|
// check that nothing leaked to next buffer.
|
t.equal(next.readUInt32BE(0), 0)
|
// check that no bytes are read from next buffer.
|
next.writeInt32BE(~0, 0)
|
var readfn = 'read' + x + y + z
|
var r = reads.shift()
|
if (isnan(r)) t.pass('equal')
|
else t.equal(v1[readfn](0, true), r)
|
}
|
}
|
}
|
t.end()
|
})
|
test('large values do not improperly roll over (ref #80)', function (t) {
|
var nums = [-25589992, -633756690, -898146932]
|
var out = new B(12)
|
out.fill(0)
|
out.writeInt32BE(nums[0], 0)
|
var newNum = out.readInt32BE(0)
|
t.equal(nums[0], newNum)
|
out.writeInt32BE(nums[1], 4)
|
newNum = out.readInt32BE(4)
|
t.equal(nums[1], newNum)
|
out.writeInt32BE(nums[2], 8)
|
newNum = out.readInt32BE(8)
|
t.equal(nums[2], newNum)
|
t.end()
|
})
|
