dwebfs/test/storage.js

dwebfs is a secure, real time distributed file system

const tape = require('tape')
const tmp = require('temporary-directory')
const create = require('./helpers/create')
const Replicator = require('./helpers/replicator')
const dwebfs = require('..')

tape('ram storage', function (t) {
  var drive = create()

  drive.ready(function () {
    t.ok(drive.metadata.writable, 'drive metadata is writable')
    t.ok(drive.contentWritable, 'drive content is writable')
    t.end()
  })
})

tape('dir storage with resume', function (t) {
  tmp(function (err, dir, cleanup) {
    t.ifError(err)
    var drive = dwebfs(dir)
    drive.ready(function () {
      t.ok(drive.metadata.writable, 'drive metadata is writable')
      t.ok(drive.contentWritable, 'drive content is writable')
      t.same(drive.version, 1, 'drive has version 1')
      drive.close(function (err) {
        t.ifError(err)

        var drive2 = dwebfs(dir)
        drive2.ready(function (err) {
          t.error(err, 'no error')
          t.ok(drive2.metadata.writable, 'drive2 metadata is writable')
          t.ok(drive2.contentWritable, 'drive2 content is writable')
          t.same(drive2.version, 1, 'drive has version 1')

          cleanup(function (err) {
            t.ifError(err)
            t.end()
          })
        })
      })
    })
  })
})

tape('dir storage for non-writable drive', function (t) {
  const r = new Replicator(t)
  var src = create()
  src.ready(function () {
    tmp(function (err, dir, cleanup) {
      t.ifError(err)

      var clone = dwebfs(dir, src.key)
      clone.ready(function () {
        t.ok(!clone.metadata.writable, 'clone metadata not writable')
        t.ok(!clone.contentWritable, 'clone content not writable')
        t.same(clone.key, src.key, 'keys match')
        cleanup(function (err) {
          t.ifError(err)
          r.end()
        })
      })

      r.replicate(src, clone)
    })
  })
})

tape('dir storage without permissions emits error', function (t) {
  // TODO: This error should not be emitted twice -- fix error propagation.
  t.plan(1)
  var drive = dwebfs('/')
  drive.on('error', function (err) {
    t.ok(err, 'got error')
  })
})

tape('write and read (sparse)', function (t) {
  const r = new Replicator(t)
  t.plan(3)

  tmp(function (err, dir, cleanup) {
    t.ifError(err)
    var drive = dwebfs(dir)
    drive.on('ready', function () {
      var clone = create(drive.key, { sparse: true })
      clone.on('ready', function () {
        drive.writeFile('/hello.txt', 'world', function (err) {
          t.error(err, 'no error')
          r.replicate(clone, drive)
          setTimeout(() => {
            var readStream = clone.createReadStream('/hello.txt')
            readStream.on('error', function (err) {
              t.error(err, 'no error')
            })
            readStream.on('data', function (data) {
              t.same(data.toString(), 'world')
              r.end()
            })
          }, 50)
        })
      })
    })
  })
})

tape('sparse read/write two files', function (t) {
  const r = new Replicator(t)
  var drive = create()
  drive.on('ready', function () {
    var clone = create(drive.key, { sparse: true })
    clone.ready(err => {
      t.error(err, 'no error')
      drive.writeFile('/hello.txt', 'world', function (err) {
        t.error(err, 'no error')
        drive.writeFile('/hello2.txt', 'world', function (err) {
          t.error(err, 'no error')
          r.replicate(drive, clone)
          clone.metadata.update(start)
        })
      })
    })

    function start () {
      clone.stat('/hello.txt', function (err, stat) {
        t.error(err, 'no error')
        t.ok(stat, 'has stat')
        clone.readFile('/hello.txt', function (err, data) {
          t.error(err, 'no error')
          t.same(data.toString(), 'world', 'data ok')
          clone.stat('/hello2.txt', function (err, stat) {
            t.error(err, 'no error')
            t.ok(stat, 'has stat')
            clone.readFile('/hello2.txt', function (err, data) {
              t.error(err, 'no error')
              t.same(data.toString(), 'world', 'data ok')
              r.end()
            })
          })
        })
      })
    }
  })
})


tape('destroying the drive destroys its data', function (t) {
  tmp(function (err, dir, cleanup) {
    t.ifError(err)
    const initial = dwebfs(dir)
    initial.writeFile('/example.txt', 'Hello World!', function (err) {
      t.ifError(err)
      initial.destroyStorage(function (err) {
        t.ifError(err)
        const copy = dwebfs(dir)

        copy.readdir('/', function (err, files) {
          t.ifError(err)
          t.deepEqual(files, [], 'archive now empty')
          copy.close(function (err) {
            t.ifError(err)
            cleanup(function(err) {
              t.ifError(err)
              t.end()
            })
          })
        })
      })
    })
  })
})