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123 lines
2.9 KiB
JavaScript
123 lines
2.9 KiB
JavaScript
var varint = require('./index')
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, test = require('tape')
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, decode = varint.decode
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, encode = varint.encode
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, encodingLength = varint.encodingLength
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test('fuzz test', function(assert) {
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var expect
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, encoded
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for(var i = 0, len = 100; i < len; ++i) {
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expect = randint(0x7FFFFFFF)
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encoded = encode(expect)
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var data = decode(encoded)
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assert.equal(expect, data, 'fuzz test: ' + expect.toString())
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assert.equal(decode.bytesRead, encoded.length)
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}
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assert.end()
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})
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test('test single byte works as expected', function(assert) {
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var buf = new Uint8Array(2)
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buf[0] = 172
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buf[1] = 2
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var data = decode(buf)
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assert.equal(data, 300, 'should equal 300')
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assert.equal(decode.bytesRead, 2)
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assert.end()
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})
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test('test encode works as expected', function(assert) {
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var out = []
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assert.deepEqual(encode(300), [0xAC, 0x02])
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assert.end()
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})
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test('test decode single bytes', function(assert) {
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var expected = randint(parseInt('1111111', '2'))
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var buf = new Uint8Array(1)
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buf[0] = expected
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var data = decode(buf)
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assert.equal(data, expected)
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assert.equal(decode.bytesRead, 1)
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assert.end()
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})
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test('test decode multiple bytes with zero', function(assert) {
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var expected = randint(parseInt('1111111', '2'))
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var buf = new Uint8Array(2)
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buf[0] = 128
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buf[1] = expected
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var data = decode(buf)
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assert.equal(data, expected << 7)
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assert.equal(decode.bytesRead, 2)
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assert.end()
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})
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test('encode single byte', function(assert) {
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var expected = randint(parseInt('1111111', '2'))
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assert.deepEqual(encode(expected), [expected])
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assert.equal(encode.bytesWritten, 1)
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assert.end()
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})
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test('encode multiple byte with zero first byte', function(assert) {
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var expected = 0x0F00
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assert.deepEqual(encode(expected), [0x80, 0x1E])
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assert.equal(encode.bytesWritten, 2)
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assert.end()
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})
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test('big integers', function (assert) {
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var bigs = []
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for(var i = 32; i <= 53; i++) (function (i) {
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bigs.push(Math.pow(2, i) - 1)
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bigs.push(Math.pow(2, i))
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})(i)
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console.log(bigs)
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bigs.forEach(function (n) {
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var data = encode(n)
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console.error(n, '->', data)
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assert.equal(decode(data), n)
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assert.notEqual(decode(data), n - 1)
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})
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assert.end()
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})
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test('fuzz test - big', function(assert) {
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var expect
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, encoded
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var MAX_INTD = Math.pow(2, 55)
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var MAX_INT = Math.pow(2, 31)
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for(var i = 0, len = 100; i < len; ++i) {
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expect = randint(MAX_INTD - MAX_INT) + MAX_INT
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encoded = encode(expect)
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var data = decode(encoded)
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assert.equal(expect, data, 'fuzz test: ' + expect.toString())
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assert.equal(decode.bytesRead, encoded.length)
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}
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assert.end()
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})
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test('encodingLength', function (assert) {
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for(var i = 0; i <= 53; i++) {
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var n = Math.pow(2, i)
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assert.equal(encode(n).length, encodingLength(n))
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}
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assert.end()
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})
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function randint(range) {
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return Math.floor(Math.random() * range)
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}
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