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node_modules/buffer/test/slice.js 958 Bytes
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('modifying buffer created by .slice() modifies original memory', function (t) {
    if (!B.TYPED_ARRAY_SUPPORT) return t.end()
  
    var buf1 = new B(26)
    for (var i = 0; i < 26; i++) {
      buf1[i] = i + 97 // 97 is ASCII a
    }
  
    var buf2 = buf1.slice(0, 3)
    t.equal(buf2.toString('ascii', 0, buf2.length), 'abc')
  
    buf2[0] = '!'.charCodeAt(0)
    t.equal(buf1.toString('ascii', 0, buf2.length), '!bc')
  
    t.end()
  })
  
  test('modifying parent buffer modifies .slice() buffer\'s memory', function (t) {
    if (!B.TYPED_ARRAY_SUPPORT) return t.end()
  
    var buf1 = new B(26)
    for (var i = 0; i < 26; i++) {
      buf1[i] = i + 97 // 97 is ASCII a
    }
  
    var buf2 = buf1.slice(0, 3)
    t.equal(buf2.toString('ascii', 0, buf2.length), 'abc')
  
    buf1[0] = '!'.charCodeAt(0)
    t.equal(buf2.toString('ascii', 0, buf2.length), '!bc')
  
    t.end()
  })