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node_modules/buffer/test/write_infinity.js 1.14 KB
aaac7fed   liuqimichale   add
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  if (process.env.OBJECT_IMPL) global.TYPED_ARRAY_SUPPORT = false
  var B = require('../').Buffer
  var test = require('tape')
  
  test('write/read Infinity as a float', function (t) {
    var buf = new B(4)
    t.equal(buf.writeFloatBE(Infinity, 0), 4)
    t.equal(buf.readFloatBE(0), Infinity)
    t.end()
  })
  
  test('write/read -Infinity as a float', function (t) {
    var buf = new B(4)
    t.equal(buf.writeFloatBE(-Infinity, 0), 4)
    t.equal(buf.readFloatBE(0), -Infinity)
    t.end()
  })
  
  test('write/read Infinity as a double', function (t) {
    var buf = new B(8)
    t.equal(buf.writeDoubleBE(Infinity, 0), 8)
    t.equal(buf.readDoubleBE(0), Infinity)
    t.end()
  })
  
  test('write/read -Infinity as a double', function (t) {
    var buf = new B(8)
    t.equal(buf.writeDoubleBE(-Infinity, 0), 8)
    t.equal(buf.readDoubleBE(0), -Infinity)
    t.end()
  })
  
  test('write/read float greater than max', function (t) {
    var buf = new B(4)
    t.equal(buf.writeFloatBE(4e38, 0), 4)
    t.equal(buf.readFloatBE(0), Infinity)
    t.end()
  })
  
  test('write/read float less than min', function (t) {
    var buf = new B(4)
    t.equal(buf.writeFloatBE(-4e40, 0), 4)
    t.equal(buf.readFloatBE(0), -Infinity)
    t.end()
  })