text: var test = require('tap').test
  var fs = require('../graceful-fs.js')
  
  test('open an existing file works', function (t) {
      var start = fs._curOpen
      var fd = fs.openSync(__filename, 'r')
      t.equal(fs._curOpen, start + 1)
      fs.closeSync(fd)
      t.equal(fs._curOpen, start)
      fs.open(__filename, 'r', function (er, fd) {
          if (er) {
              throw er
          }
          t.equal(fs._curOpen, start + 1)
          fs.close(fd, function (er) {
              if (er) {
                  throw er
              }
              t.equal(fs._curOpen, start)
              t.end()
          })
      })
  })
  
  test('open a non-existing file throws', function (t) {
      var start = fs._curOpen
      var er
      try {
          var fd = fs.openSync('this file does not exist', 'r')
      } catch (x) {
          er = x
      }
      t.ok(er, 'should throw')
      t.notOk(fd, 'should not get an fd')
      t.equal(er.code, 'ENOENT')
      t.equal(fs._curOpen, start)
  
      fs.open('neither does this file', 'r', function (er, fd) {
          t.ok(er, 'should throw')
          t.notOk(fd, 'should not get an fd')
          t.equal(er.code, 'ENOENT')
          t.equal(fs._curOpen, start)
          t.end()
      })
  })
  