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README.md

@@ -111,7 +111,7 @@ The following options are for advanced performance tuning. Modify them only if y
 ### `db.put(key, value[, options], callback)`
 <code>put()</code> is an instance method on an existing database object, used to store new entries, or overwrite existing entries in the LevelDB store.
 
-The `key` and `value` objects may either be strings or Buffers. Other object types are converted to strings with the `toString()` method. Keys may not be `null` or `undefined` and objects converted with `toString()` should not result in an empty-string. Values of `null`, `undefined`, `''`, `[]` and `Buffer.alloc(0)` (and any object resulting in a `toString()` of one of these) will be stored as a zero-length character array and will therefore be retrieved as either `''` or `Buffer.alloc(0)` depending on the type requested.
+The `key` and `value` objects may either be strings or Buffers. Other object types are converted to strings with the `toString()` method. Keys may not be `null` or `undefined` and objects converted with `toString()` should not result in an empty-string. Values may not be `null` or `undefined`. Values of `''`, `[]` and `Buffer.alloc(0)` (and any object resulting in a `toString()` of one of these) will be stored as a zero-length character array and will therefore be retrieved as either `''` or `Buffer.alloc(0)` depending on the type requested.
 
 A richer set of data-types is catered for in `levelup`.
 

chained-batch.js

@@ -19,7 +19,7 @@ ChainedBatch.prototype._clear = function (key) {
 }
 
 ChainedBatch.prototype._write = function (options, callback) {
-  this.binding.write(options, callback)
+  this.binding.write(callback)
 }
 
 util.inherits(ChainedBatch, AbstractChainedBatch)

iterator.js

@@ -13,18 +13,9 @@ function Iterator (db, options) {
 
 util.inherits(Iterator, AbstractIterator)
 
-Iterator.prototype.seek = function (target) {
-  if (this._ended) {
-    throw new Error('cannot call seek() after end()')
-  }
-  if (this._nexting) {
-    throw new Error('cannot call seek() before next() has completed')
-  }
-  if (typeof target !== 'string' && !Buffer.isBuffer(target)) {
-    throw new Error('seek() requires a string or buffer key')
-  }
+Iterator.prototype._seek = function (target) {
   if (target.length === 0) {
-    throw new Error('cannot seek() to an empty key')
+    throw new Error('cannot seek() to an empty target')
   }
 
   this.cache = null

leveldown.js

@@ -9,7 +9,13 @@ function LevelDOWN (location) {
     return new LevelDOWN(location)
   }
 
-  AbstractLevelDOWN.call(this, location)
+  if (typeof location !== 'string') {
+    throw new Error('constructor requires a location string argument')
+  }
+
+  AbstractLevelDOWN.call(this)
+
+  this.location = location
   this.binding = binding(location)
 }
 
@@ -23,6 +29,14 @@ LevelDOWN.prototype._close = function (callback) {
   this.binding.close(callback)
 }
 
+LevelDOWN.prototype._serializeKey = function (key) {
+  return Buffer.isBuffer(key) ? key : String(key)
+}
+
+LevelDOWN.prototype._serializeValue = function (value) {
+  return Buffer.isBuffer(value) ? value : String(value)
+}
+
 LevelDOWN.prototype._put = function (key, value, options, callback) {
   this.binding.put(key, value, options, callback)
 }

package.json

@@ -13,7 +13,7 @@
   ],
   "main": "leveldown.js",
   "dependencies": {
-    "abstract-leveldown": "~5.0.0",
+    "abstract-leveldown": "~6.0.0",
     "bindings": "~1.3.0",
     "fast-future": "~1.0.2",
     "nan": "~2.11.0",
@@ -24,8 +24,7 @@
     "coveralls": "^3.0.2",
     "delayed": "~1.0.1",
     "du": "~0.1.0",
-    "iota-array": "~1.0.0",
-    "lexicographic-integer": "~1.1.0",
+    "level-concat-iterator": "^2.0.0",
     "mkfiletree": "~1.0.1",
     "monotonic-timestamp": "~0.0.8",
     "nyc": "^12.0.2",
@@ -39,6 +38,7 @@
     "slump": "~2.0.0",
     "standard": "^12.0.0",
     "tape": "^4.5.1",
+    "tempy": "^0.2.1",
     "uuid": "^3.2.1",
     "verify-travis-appveyor": "^3.0.0"
   },

test/abstract-leveldown-test.js

@@ -0,0 +1 @@
+require('abstract-leveldown/test')(require('./common'))

test/approximate-size-test.js

@@ -1,13 +1,12 @@
 const test = require('tape')
-const leveldown = require('..')
-const testCommon = require('abstract-leveldown/testCommon')
+const testCommon = require('./common')
 
 var db
 
 test('setUp common for approximate size', testCommon.setUp)
 
 test('setUp db', function (t) {
-  db = leveldown(testCommon.location())
+  db = testCommon.factory()
   db.open(t.end.bind(t))
 })
 
@@ -67,7 +66,7 @@ test('test 1-arg + callback approximateSize() throws', function (t) {
 
 test('test custom _serialize*', function (t) {
   t.plan(4)
-  var db = leveldown(testCommon.location())
+  var db = testCommon.factory()
   db._serializeKey = function (data) { return data }
   db.approximateSize = function (start, end, callback) {
     t.deepEqual(start, { foo: 'bar' })

test/common.js

@@ -0,0 +1,11 @@
+const test = require('tape')
+const tempy = require('tempy')
+const leveldown = require('..')
+const suite = require('abstract-leveldown/test')
+
+module.exports = suite.common({
+  test: test,
+  factory: function () {
+    return leveldown(tempy.directory())
+  }
+})

test/compact-range-test.js

@@ -1,13 +1,12 @@
 const test = require('tape')
-const testCommon = require('abstract-leveldown/testCommon')
-const leveldown = require('..')
+const testCommon = require('./common')
 
 let db
 
 test('setUp common', testCommon.setUp)
 
 test('setUp db', function (t) {
-  db = leveldown(testCommon.location())
+  db = testCommon.factory()
   db.open(t.end.bind(t))
 })
 

test/compression-test.js

@@ -1,12 +1,7 @@
-/* Copyright (c) 2012-2017 LevelUP contributors
- * See list at <https://github.com/level/leveldown#contributing>
- * MIT License <https://github.com/level/leveldown/blob/master/LICENSE.md>
- */
-
 const async = require('async')
 const du = require('du')
 const delayed = require('delayed')
-const common = require('abstract-leveldown/testCommon')
+const testCommon = require('./common')
 const leveldown = require('..')
 const test = require('tape')
 
@@ -46,10 +41,10 @@ const cycle = function (db, compression, t, callback) {
 }
 
 test('Compression', function (t) {
-  t.test('set up', common.setUp)
+  t.test('set up', testCommon.setUp)
 
   t.test('test data is compressed by default (db.put())', function (t) {
-    var db = leveldown(common.location())
+    var db = testCommon.factory()
     db.open(function (err) {
       t.error(err)
       async.forEach(
@@ -63,7 +58,7 @@ test('Compression', function (t) {
   })
 
   t.test('test data is not compressed with compression=false on open() (db.put())', function (t) {
-    var db = leveldown(common.location())
+    var db = testCommon.factory()
     db.open({ compression: false }, function (err) {
       t.error(err)
       async.forEach(
@@ -77,7 +72,7 @@ test('Compression', function (t) {
   })
 
   t.test('test data is compressed by default (db.batch())', function (t) {
-    var db = leveldown(common.location())
+    var db = testCommon.factory()
     db.open(function (err) {
       t.error(err)
       db.batch(

test/destroy-test.js

@@ -1,5 +1,5 @@
 const test = require('tape')
-const testCommon = require('abstract-leveldown/testCommon')
+const tempy = require('tempy')
 const fs = require('fs')
 const path = require('path')
 const mkfiletree = require('mkfiletree')
@@ -27,7 +27,7 @@ test('test callback-less, 1-arg, destroy() throws', function (t) {
 test('test destroy non-existent directory', function (t) {
   t.plan(4)
 
-  var location = testCommon.location()
+  var location = tempy.directory()
   var parent = path.dirname(location)
 
   // For symmetry with the opposite test below.
@@ -86,7 +86,8 @@ test('test destroy non leveldb directory', function (t) {
   })
 })
 
-makeTest('test destroy() cleans and removes leveldb-only dir', function (db, t, done, location) {
+makeTest('test destroy() cleans and removes leveldb-only dir', function (db, t, done) {
+  var location = db.location
   db.close(function (err) {
     t.ifError(err, 'no close error')
 
@@ -99,7 +100,8 @@ 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, location) {
+makeTest('test destroy() cleans and removes only leveldb parts of a dir', function (db, t, done) {
+  var location = db.location
   fs.writeFileSync(path.join(location, 'foo'), 'FOO')
 
   db.close(function (err) {

test/getproperty-test.js

@@ -1,13 +1,12 @@
 const test = require('tape')
-const testCommon = require('abstract-leveldown/testCommon')
-const leveldown = require('..')
+const testCommon = require('./common')
 
 let db
 
 test('setUp common', testCommon.setUp)
 
 test('setUp db', function (t) {
-  db = leveldown(testCommon.location())
+  db = testCommon.factory()
   db.open(t.end.bind(t))
 })
 

test/iterator-gc-test.js

@@ -1,8 +1,8 @@
 'use strict'
 
 const test = require('tape')
-const testCommon = require('abstract-leveldown/testCommon')
-const leveldown = require('..')
+const collectEntries = require('level-concat-iterator')
+const testCommon = require('./common')
 const sourceData = []
 
 for (let i = 0; i < 1e3; i++) {
@@ -20,7 +20,7 @@ test('setUp', testCommon.setUp)
 test('db without ref does not get GCed while iterating', function (t) {
   t.plan(6)
 
-  let db = leveldown(testCommon.location())
+  let db = testCommon.factory()
 
   db.open(function (err) {
     t.ifError(err, 'no open error')
@@ -50,7 +50,7 @@ test('db without ref does not get GCed while iterating', function (t) {
 
   function iterate (it) {
     // No reference to db here, could be GCed. It shouldn't..
-    testCommon.collectEntries(it, function (err, entries) {
+    collectEntries(it, function (err, entries) {
       t.ifError(err, 'no iterator error')
       t.is(entries.length, sourceData.length, 'got data')
 

test/iterator-recursion-test.js

@@ -1,6 +1,5 @@
 const test = require('tape')
-const testCommon = require('abstract-leveldown/testCommon')
-const leveldown = require('..')
+const testCommon = require('./common')
 const fork = require('child_process').fork
 const path = require('path')
 
@@ -43,7 +42,7 @@ test('try to create an iterator with a blown stack', function (t) {
 })
 
 test('setUp db', function (t) {
-  db = leveldown(testCommon.location())
+  db = testCommon.factory()
   db.open(function (err) {
     t.error(err)
     db.batch(sourceData, t.end.bind(t))