Bump standard from 15.x to 16.x

.github/dependabot.yml

@@ -8,5 +8,4 @@ updates:
       - dependency-name: dependency-check
       - dependency-name: cross-env
       - dependency-name: node-gyp
-      - dependency-name: standard
       - dependency-name: tempy

chained-batch.js

@@ -1,3 +1,5 @@
+'use strict'
+
 const util = require('util')
 const AbstractChainedBatch = require('abstract-leveldown').AbstractChainedBatch
 const binding = require('./binding')

iterator.js

@@ -1,3 +1,5 @@
+'use strict'
+
 const util = require('util')
 const AbstractIterator = require('abstract-leveldown').AbstractIterator
 const binding = require('./binding')
@@ -23,19 +25,17 @@ Iterator.prototype._seek = function (target) {
 }
 
 Iterator.prototype._next = function (callback) {
-  var that = this
-
   if (this.cache && this.cache.length) {
     process.nextTick(callback, null, this.cache.pop(), this.cache.pop())
   } else if (this.finished) {
     process.nextTick(callback)
   } else {
-    binding.iterator_next(this.context, function (err, array, finished) {
+    binding.iterator_next(this.context, (err, array, finished) => {
       if (err) return callback(err)
 
-      that.cache = array
-      that.finished = finished
-      that._next(callback)
+      this.cache = array
+      this.finished = finished
+      this._next(callback)
     })
   }
 

leveldown.js

@@ -1,3 +1,5 @@
+'use strict'
+
 const util = require('util')
 const AbstractLevelDOWN = require('abstract-leveldown').AbstractLevelDOWN
 const binding = require('./binding')

package.json

@@ -49,7 +49,7 @@
     "prebuildify-cross": "^4.0.0",
     "readfiletree": "^1.0.0",
     "rimraf": "^3.0.0",
-    "standard": "^15.0.0",
+    "standard": "^16.0.3",
     "tape": "^5.0.1",
     "tempy": "^0.3.0"
   },

test/approximate-size-test.js

@@ -1,7 +1,7 @@
 const test = require('tape')
 const testCommon = require('./common')
 
-var db
+let db
 
 test('setUp common for approximate size', testCommon.setUp)
 
@@ -66,7 +66,7 @@ test('test 1-arg + callback approximateSize() throws', function (t) {
 
 test('test custom _serialize*', function (t) {
   t.plan(4)
-  var db = testCommon.factory()
+  const db = testCommon.factory()
   db._serializeKey = function (data) { return data }
   db.approximateSize = function (start, end, callback) {
     t.deepEqual(start, { foo: 'bar' })
@@ -82,7 +82,7 @@ test('test custom _serialize*', function (t) {
 })
 
 test('test approximateSize()', function (t) {
-  var data = Array.apply(null, Array(10000)).map(function () {
+  const data = Array.apply(null, Array(10000)).map(function () {
     return 'aaaaaaaaaa'
   }).join('')
 

test/cleanup-hanging-iterators-test.js

@@ -3,7 +3,7 @@ const repeats = 200
 
 makeTest('test ended iterator', function (db, t, done) {
   // First test normal and proper usage: calling it.end() before db.close()
-  var it = db.iterator({ keyAsBuffer: false, valueAsBuffer: false })
+  const it = db.iterator({ keyAsBuffer: false, valueAsBuffer: false })
 
   it.next(function (err, key, value) {
     t.ifError(err, 'no error from next()')
@@ -19,7 +19,7 @@ makeTest('test ended iterator', function (db, t, done) {
 makeTest('test likely-ended iterator', function (db, t, done) {
   // Test improper usage: not calling it.end() before db.close(). Cleanup of the
   // database will crash Node if not handled properly.
-  var it = db.iterator({ keyAsBuffer: false, valueAsBuffer: false })
+  const it = db.iterator({ keyAsBuffer: false, valueAsBuffer: false })
 
   it.next(function (err, key, value) {
     t.ifError(err, 'no error from next()')
@@ -33,7 +33,7 @@ makeTest('test non-ended iterator', function (db, t, done) {
   // Same as the test above but with a highWaterMark of 0 so that we don't
   // preemptively fetch all records, to ensure that the iterator is still
   // active when we (attempt to) close the database.
-  var it = db.iterator({
+  const it = db.iterator({
     highWaterMark: 0,
     keyAsBuffer: false,
     valueAsBuffer: false
@@ -84,10 +84,10 @@ global.gc && makeTest('test multiple non-ended iterators with forced gc', functi
 
 makeTest('test ending iterators', function (db, t, done) {
   // At least one end() should be in progress when we try to close the db.
-  var it1 = db.iterator().next(function () {
+  const it1 = db.iterator().next(function () {
     it1.end(function () {})
   })
-  var it2 = db.iterator().next(function () {
+  const it2 = db.iterator().next(function () {
     it2.end(function () {})
     done()
   })

test/compact-range-test.js

@@ -11,10 +11,10 @@ test('setUp db', function (t) {
 })
 
 test('test compactRange() frees disk space after key deletion', function (t) {
-  var key1 = '000000'
-  var key2 = '000001'
-  var val1 = Buffer.allocUnsafe(64).fill(1)
-  var val2 = Buffer.allocUnsafe(64).fill(1)
+  const key1 = '000000'
+  const key2 = '000001'
+  const val1 = Buffer.allocUnsafe(64).fill(1)
+  const val2 = Buffer.allocUnsafe(64).fill(1)
 
   db.batch().put(key1, val1).put(key2, val2).write(function (err) {
     t.ifError(err, 'no batch put error')
@@ -46,8 +46,8 @@ test('test compactRange() frees disk space after key deletion', function (t) {
 test('test compactRange() serializes start and end', function (t) {
   t.plan(3)
 
-  var clone = Object.create(db)
-  var count = 0
+  const clone = Object.create(db)
+  let count = 0
 
   clone._serializeKey = function (key) {
     t.is(key, count++)

test/compression-test.js

@@ -26,7 +26,7 @@ const verify = function (location, compression, t) {
 
 // close, open, close again.. 'compaction' is also performed on open()s
 const cycle = function (db, compression, t, callback) {
-  var location = db.location
+  const location = db.location
   db.close(function (err) {
     t.error(err)
     db = leveldown(location)
@@ -45,7 +45,7 @@ test('compression', function (t) {
   t.test('set up', testCommon.setUp)
 
   t.test('test data is compressed by default (db.put())', function (t) {
-    var db = testCommon.factory()
+    const db = testCommon.factory()
     db.open(function (err) {
       t.error(err)
       each(
@@ -59,7 +59,7 @@ test('compression', function (t) {
   })
 
   t.test('test data is not compressed with compression=false on open() (db.put())', function (t) {
-    var db = testCommon.factory()
+    const db = testCommon.factory()
     db.open({ compression: false }, function (err) {
       t.error(err)
       each(
@@ -73,7 +73,7 @@ test('compression', function (t) {
   })
 
   t.test('test data is compressed by default (db.batch())', function (t) {
-    var db = testCommon.factory()
+    const db = testCommon.factory()
     db.open(function (err) {
       t.error(err)
       db.batch(

test/destroy-test.js

@@ -27,8 +27,8 @@ test('test callback-less, 1-arg, destroy() throws', function (t) {
 test('test destroy non-existent directory', function (t) {
   t.plan(4)
 
-  var location = tempy.directory()
-  var parent = path.dirname(location)
+  const location = tempy.directory()
+  const parent = path.dirname(location)
 
   // For symmetry with the opposite test below.
   t.ok(fs.existsSync(parent), 'parent exists before')
@@ -50,8 +50,8 @@ test('test destroy non-existent directory', function (t) {
 test('test destroy non-existent parent directory', function (t) {
   t.plan(3)
 
-  var location = '/1/2/3/4'
-  var parent = path.dirname(location)
+  const location = '/1/2/3/4'
+  const parent = path.dirname(location)
 
   t.notOk(fs.existsSync(parent), 'parent does not exist before')
 
@@ -62,7 +62,7 @@ test('test destroy non-existent parent directory', function (t) {
 })
 
 test('test destroy non leveldb directory', function (t) {
-  var tree = {
+  const tree = {
     foo: 'FOO',
     bar: { one: 'ONE', two: 'TWO', three: 'THREE' }
   }
@@ -87,7 +87,7 @@ test('test destroy non leveldb directory', function (t) {
 })
 
 makeTest('test destroy() cleans and removes leveldb-only dir', function (db, t, done) {
-  var location = db.location
+  const location = db.location
   db.close(function (err) {
     t.ifError(err, 'no error from close()')
 
@@ -101,7 +101,7 @@ makeTest('test destroy() cleans and removes leveldb-only dir', function (db, t,
 })
 
 makeTest('test destroy() cleans and removes only leveldb parts of a dir', function (db, t, done) {
-  var location = db.location
+  const location = db.location
   fs.writeFileSync(path.join(location, 'foo'), 'FOO')
 
   db.close(function (err) {

test/getproperty-test.js

@@ -33,7 +33,7 @@ test('test invalid getProperty() returns empty string', function (t) {
 })
 
 test('test invalid getProperty("leveldb.num-files-at-levelN") returns numbers', function (t) {
-  for (var i = 0; i < 7; i++) {
+  for (let i = 0; i < 7; i++) {
     t.equal(db.getProperty('leveldb.num-files-at-level' + i),
       '0', '"leveldb.num-files-at-levelN" === "0"')
   }
@@ -46,7 +46,7 @@ test('test invalid getProperty("leveldb.stats")', function (t) {
 })
 
 test('test invalid getProperty("leveldb.sstables")', function (t) {
-  var expected = [0, 1, 2, 3, 4, 5, 6].map(function (l) {
+  const expected = [0, 1, 2, 3, 4, 5, 6].map(function (l) {
     return '--- level ' + l + ' ---'
   }).join('\n') + '\n'
   t.equal(db.getProperty('leveldb.sstables'), expected, 'leveldb.sstables')

test/iterator-recursion-test.js

@@ -6,9 +6,9 @@ const path = require('path')
 let db
 
 const sourceData = (function () {
-  var d = []
-  var i = 0
-  var k
+  const d = []
+  let i = 0
+  let k
   for (; i < 100000; i++) {
     k = (i < 10 ? '0' : '') + i
     d.push({
@@ -37,8 +37,8 @@ test.skip('try to create an iterator with a blown stack', function (t) {
       // Reducing the stack size down from the default 984 for the child node
       // process makes it easier to trigger the bug condition. But making it too low
       // causes the child process to die for other reasons.
-      var opts = { execArgv: ['--stack-size=128'] }
-      var child = fork(path.join(__dirname, 'stack-blower.js'), ['run'], opts)
+      const opts = { execArgv: ['--stack-size=128'] }
+      const child = fork(path.join(__dirname, 'stack-blower.js'), ['run'], opts)
 
       child.on('message', function (m) {
         t.ok(true, m)
@@ -64,10 +64,10 @@ test('setUp db', function (t) {
 })
 
 test('iterate over a large iterator with a large watermark', function (t) {
-  var iterator = db.iterator({
+  const iterator = db.iterator({
     highWaterMark: 10000000
   })
-  var read = function () {
+  const read = function () {
     iterator.next(function () {
       if (!arguments.length) {
         t.end()

test/iterator-test.js

@@ -3,12 +3,12 @@ const make = require('./make')
 // This test isn't included in abstract-leveldown because
 // the empty-check is currently performed by leveldown.
 make('iterator#seek throws if target is empty', function (db, t, done) {
-  var targets = ['', Buffer.alloc(0), []]
-  var pending = targets.length
+  const targets = ['', Buffer.alloc(0), []]
+  let pending = targets.length
 
   targets.forEach(function (target) {
-    var ite = db.iterator()
-    var error
+    const ite = db.iterator()
+    let error
 
     try {
       ite.seek(target)
@@ -27,7 +27,7 @@ make('iterator#seek throws if target is empty', function (db, t, done) {
 })
 
 make('iterator optimized for seek', function (db, t, done) {
-  var batch = db.batch()
+  const batch = db.batch()
   batch.put('a', 1)
   batch.put('b', 1)
   batch.put('c', 1)
@@ -36,7 +36,7 @@ make('iterator optimized for seek', function (db, t, done) {
   batch.put('f', 1)
   batch.put('g', 1)
   batch.write(function (err) {
-    var ite = db.iterator()
+    const ite = db.iterator()
     t.ifError(err, 'no error from batch()')
     ite.next(function (err, key, value) {
       t.ifError(err, 'no error from next()')
@@ -65,9 +65,9 @@ make('iterator optimized for seek', function (db, t, done) {
 })
 
 make('close db with open iterator', function (db, t, done) {
-  var ite = db.iterator()
-  var cnt = 0
-  var hadError = false
+  const ite = db.iterator()
+  let cnt = 0
+  let hadError = false
 
   ite.next(function loop (err, key, value) {
     if (cnt++ === 0) {

test/leak-tester-iterator.js

@@ -8,7 +8,7 @@ if (!global.gc) {
 }
 
 function run () {
-  var it = db.iterator()
+  const it = db.iterator()
 
   it.next(function (err) {
     if (err) throw err

test/make.js

@@ -3,8 +3,8 @@ const testCommon = require('./common')
 
 function makeTest (name, testFn) {
   test(name, function (t) {
-    var db = testCommon.factory()
-    var done = function (err, close) {
+    const db = testCommon.factory()
+    const done = function (err, close) {
       t.ifError(err, 'no error from done()')
 
       if (close === false) {

test/port-libuv-fix-test.js

@@ -3,13 +3,12 @@ const path = require('path')
 const fs = require('fs')
 
 test('test port-libuv is being used', function (t) {
-  var version = fs.readFileSync(path.join(__dirname, '../deps/leveldb/leveldb.gyp'), 'utf8')
+  const version = fs.readFileSync(path.join(__dirname, '../deps/leveldb/leveldb.gyp'), 'utf8')
     .match(/"ldbversion": "([^"]+)"/)[1]
-  var porth
 
   t.ok(version, 'matched current leveldb version')
 
-  porth = fs.readFileSync(path.join(__dirname, '../deps/leveldb/leveldb-' + version + '/port/port.h'), 'utf8')
+  const porth = fs.readFileSync(path.join(__dirname, '../deps/leveldb/leveldb-' + version + '/port/port.h'), 'utf8')
 
   t.ok(/"port_uv\.h"/.test(porth), 'port.h includes reference to port_uv.h')
 

test/repair-test.js

@@ -32,12 +32,12 @@ test('test repair non-existent directory returns error', function (t) {
 
 // a proxy indicator that RepairDB is being called and doing its thing
 makeTest('test repair() compacts', function (db, t, done) {
-  var location = db.location
+  const location = db.location
 
   db.close(function (err) {
     t.ifError(err, 'no error from close()')
 
-    var files = fs.readdirSync(location)
+    let files = fs.readdirSync(location)
     t.ok(files.some(function (f) { return (/\.log$/).test(f) }), 'directory contains log file(s)')
     t.notOk(files.some(function (f) { return (/\.ldb$/).test(f) }), 'directory does not contain ldb file(s)')
 

test/stack-blower.js

@@ -8,8 +8,8 @@
 const testCommon = require('./common')
 
 if (process.argv[2] === 'run') {
-  var db = testCommon.factory()
-  var depth = 0
+  const db = testCommon.factory()
+  let depth = 0
 
   db.open(function () {
     function recurse () {