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node_modules/fstream/examples/reader.js 1.45 KB
aaac7fed   liuqimichale   add
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  var fstream = require('../fstream.js')
  var tap = require('tap')
  var fs = require('fs')
  var path = require('path')
  var dir = path.dirname(__dirname)
  
  tap.test('reader test', function (t) {
    var children = -1
    var gotReady = false
    var ended = false
  
    var r = fstream.Reader({
      path: dir,
      filter: function () {
        // return this.parent === r
        return this.parent === r || this === r
      }
    })
  
    r.on('ready', function () {
      gotReady = true
      children = fs.readdirSync(dir).length
      console.error('Setting expected children to ' + children)
      t.equal(r.type, 'Directory', 'should be a directory')
    })
  
    r.on('entry', function (entry) {
      children--
      if (!gotReady) {
        t.fail('children before ready!')
      }
      t.equal(entry.dirname, r.path, 'basename is parent dir')
    })
  
    r.on('error', function (er) {
      t.fail(er)
      t.end()
      process.exit(1)
    })
  
    r.on('end', function () {
      t.equal(children, 0, 'should have seen all children')
      ended = true
    })
  
    var closed = false
    r.on('close', function () {
      t.ok(ended, 'saw end before close')
      t.notOk(closed, 'close should only happen once')
      closed = true
      t.end()
    })
  })
  
  tap.test('reader error test', function (t) {
    // assumes non-root on a *nix system
    var r = fstream.Reader({ path: '/etc/shadow' })
  
    r.once('error', function (er) {
      t.ok(true)
      t.end()
    })
  
    r.on('end', function () {
      t.fail('reader ended without error')
      t.end()
    })
  })