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