interface-datastore - npm Package Compare versions

Comparing version 0.6.0 to 0.7.0

docs/index.html

CHANGELOG.md

		@@ -0,1 +1,11 @@
		<a name="0.7.0"></a>
		# [0.7.0](https://github.com/ipfs/interface-datastore/compare/v0.6.0...v0.7.0) (2019-05-01)


		### Features

		* refactor to async iterators ([#25](https://github.com/ipfs/interface-datastore/issues/25)) ([ab2f2b9](https://github.com/ipfs/interface-datastore/commit/ab2f2b9))



		<a name="0.6.0"></a>
		@@ -2,0 +12,0 @@ # [0.6.0](https://github.com/ipfs/interface-datastore/compare/v0.5.0...v0.6.0) (2018-10-24)

dist/index.min.js

		@@ -1,2 +0,2 @@
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		//# sourceMappingURL=index.min.js.map

package.json

		{
		"name": "interface-datastore",
		"version": "0.6.0",
		"version": "0.7.0",
		"description": "datastore interface",
		"leadMaintainer": "Pedro Teixeira <i@pgte.me>",
		"leadMaintainer": "Alex Potsides <alex.potsides@protocol.ai>",
		"main": "src/index.js",
		@@ -37,13 +37,10 @@ "scripts": {
		"devDependencies": {
		"aegir": "^15.1.0",
		"aegir": "^18.2.2",
		"chai": "^4.1.2",
		"dirty-chai": "^2.0.1",
		"flow-bin": "~0.83.0"
		"flow-bin": "~0.97.0"
		},
		"dependencies": {
		"async": "^2.6.1",
		"class-is": "^1.1.0",
		"err-code": "^1.1.2",
		"pull-defer": "~0.2.3",
		"pull-stream": "^3.6.9",
		"uuid": "^3.2.2"
		@@ -56,2 +53,3 @@ },
		"contributors": [
		"Alan Shaw <alan.shaw@protocol.ai>",
		"David Dias <daviddias.p@gmail.com>",
		@@ -66,2 +64,3 @@ "Erin Dachtler <download333@gmail.com>",
		"Vasco Santos <vasco.santos@moxy.studio>",
		"achingbrain <alex@achingbrain.net>",
		"dignifiedquire <dignifiedquire@gmail.com>",
		@@ -68,0 +67,0 @@ "tcme <hi@this-connect.me>",

117

README.md

		@@ -18,3 +18,3 @@ # interface-datastore

		[Pedro Teixeira](https://github.com/pgte)
		[Alex Potsides](https://github.com/achingbrain)

		@@ -51,5 +51,5 @@ ## Table of Contents
		const fs = new FsStore('path/to/store')
		ShardingStore.createOrOpen(fs, new NextToLast(2), (err, flatfs) => {
		// flatfs now works like go-flatfs
		})

		// flatfs now works like go-flatfs
		const flatfs = await ShardingStore.createOrOpen(fs, new NextToLast(2))
		```
		@@ -59,3 +59,3 @@

		```
		```sh
		$ npm install interface-datastore
		@@ -73,6 +73,6 @@ ```

		const store = new MountStore({prefix: new Key('/a'), datastore: new MemoryStore()})
		const store = new MountStore({ prefix: new Key('/a'), datastore: new MemoryStore() })
		```

		### Testsuite
		### Test suite

		@@ -84,8 +84,7 @@ Available under [`src/tests.js`](src/tests.js)
		require('interface-datastore/src/tests')({
		setup (callback) {
		callback(null, instanceOfMyStore)
		async setup () {
		return instanceOfMyStore
		},
		teardown (callback) {
		async teardown () {
		// cleanup resources
		callback()
		}
		@@ -107,3 +106,3 @@ })

		The key scheme is inspired by file systems and Google App Engine key model. Keys are meant to be unique across a system. They are typical hierarchical, incorporating more and more specific namespaces. Thus keys can be deemed 'children' or 'ancestors' of other keys:
		The key scheme is inspired by file systems and Google App Engine key model. Keys are meant to be unique across a system. They are typically hierarchical, incorporating more and more specific namespaces. Thus keys can be deemed 'children' or 'ancestors' of other keys:

		@@ -113,3 +112,3 @@ - `new Key('/Comedy')`

		Also, every namespace can be parametrized to embed relevant object information. For example, the Key `name` (most specific namespace) could include the object type:
		Also, every namespace can be parameterized to embed relevant object information. For example, the Key `name` (most specific namespace) could include the object type:

		@@ -127,6 +126,5 @@ - `new Key('/Comedy/MontyPython/Actor:JohnCleese')`

		### `has(key, callback)`
		### `has(key)` -> `Promise<Boolean>`

		- `key: Key`
		- `callback: function(Error, bool)`

		@@ -136,15 +134,10 @@ Check for the existence of a given key
		```js
		store.has(new Key('awesome'), (err, exists) => {
		if (err) {
		throw err
		}
		console.log('is it there', exists)
		})
		const exists = await store.has(new Key('awesome'))
		console.log('is it there', exists)
		```

		### `put(key, value, callback)`
		### `put(key, value)` -> `Promise`

		- `key: Key`
		- `value: Value`
		- `callback: function(Error)`

		@@ -154,14 +147,9 @@ Store a value with the given key.
		```js
		store.put(new Key('awesome'), new Buffer('datastores'), (err) => {
		if (err) {
		throw err
		}
		console.log('put content')
		})
		await store.put(new Key('awesome'), new Buffer('datastores'))
		console.log('put content')
		```

		### `get(key, callback)`
		### `get(key)` -> `Promise<Value>`

		- `key: Key`
		- `callback: function(Error, Value)`

		@@ -171,15 +159,10 @@ Retrieve the value stored under the given key.
		```js
		store.get(new Key('awesome'), (err, value) => {
		if (err) {
		throw err
		}
		console.log('got content: %s', value.toString())
		// => got content: datastore
		})
		const value = await store.get(new Key('awesome'))
		console.log('got content: %s', value.toString())
		// => got content: datastore
		```

		### `delete(key, callback)`
		### `delete(key)` -> `Promise`

		- `key: Key`
		- `callback: function(Error)`

		@@ -189,28 +172,19 @@ Delete the content stored under the given key.
		```js
		store.delete(new Key('awesome'), (err) => {
		if (err) {
		throw err
		}
		console.log('deleted awesome content :(')
		})
		await store.delete(new Key('awesome'))
		console.log('deleted awesome content :(')
		```

		### `query(query)`
		### `query(query)` -> `Iterable`

		- `query: Query` see below for possible values
		- Returns: `pull-stream source`

		Search the store for some values. Returns a [pull-stream](https://pull-stream.github.io/) with each item being a `Value`.
		Search the store for some values. Returns an [Iterable](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) with each item being a `Value`.

		```js
		// retrieve __all__ values from the store
		pull(
		store.query({}),
		pull.collect((err, list) => {
		if (err) {
		console.error(err)
		}
		console.log('ALL THE VALUES', list)
		})
		)
		let list = []
		for await (const value of store.query({})) {
		list.push(value)
		}
		console.log('ALL THE VALUES', list)
		```
		@@ -225,5 +199,5 @@
		- `orders: Array<Order<Value>>` (optional) - order the results according to these functions
		- `limit: number` (optional) - only return this many records
		- `offset: number` (optional) - skip this many records at the beginning
		- `keysOnly: bool` (optional) - Only return keys, no values.
		- `limit: Number` (optional) - only return this many records
		- `offset: Number` (optional) - skip this many records at the beginning
		- `keysOnly: Boolean` (optional) - Only return keys, no values.

		@@ -241,9 +215,4 @@ ### `batch()`

		b.commit((err) => {
		if (err) {
		throw err
		}
		console.log('put 100 values')
		})

		await b.commit()
		console.log('put 100 values')
		```
		@@ -264,18 +233,12 @@

		#### `commit(callback)`
		#### `commit()` -> `Promise`

		- `callback: function(Error)`

		Write all queued operations to the underyling store. The batch object should not be used after calling this.

		### `open(callback)`
		### `open()` -> `Promise`

		- `callback: function(Error)`

		Opens the datastore, this is only needed if the store was closed before, otherwise this is taken care of by the constructor.

		### `close(callback)`
		### `close()` -> `Promise`

		- `callback: function(Error)`

		Close the datastore, this should always be called to ensure resources are cleaned up.
		@@ -282,0 +245,0 @@

src/memory.js

		@@ -6,7 +6,3 @@ /* @flow */

		const pull = require('pull-stream')
		const setImmediate = require('async/setImmediate')

		const asyncFilter = require('./utils').asyncFilter
		const asyncSort = require('./utils').asyncSort
		const { filter, sortAll, take, map } = require('./utils')
		const Key = require('./key')
		@@ -24,38 +20,20 @@

		open (callback /* : Callback<void> /) / : void */ {
		setImmediate(callback)
		}
		async open () /* : Promise */ {}

		put (key /* : Key /, val / : Buffer /, callback / : Callback<void> /) / : void */ {
		async put (key /* : Key /, val / : Buffer /) / : Promise */ {
		this.data[key.toString()] = val

		setImmediate(callback)
		}

		get (key /* : Key /, callback / : Callback<Buffer> /) / : void */ {
		this.has(key, (err, exists) => {
		if (err) {
		return callback(err)
		}

		if (!exists) {
		return callback(Errors.notFoundError())
		}

		callback(null, this.data[key.toString()])
		})
		async get (key /* : Key /) / : Promise<Buffer> */ {
		const exists = await this.has(key)
		if (!exists) throw Errors.notFoundError()
		return this.data[key.toString()]
		}

		has (key /* : Key /, callback / : Callback<bool> /) / : void */ {
		setImmediate(() => {
		callback(null, this.data[key.toString()] !== undefined)
		})
		async has (key /* : Key /) / : Promise<Boolean> */ {
		return this.data[key.toString()] !== undefined
		}

		delete (key /* : Key /, callback / : Callback<void> /) / : void */ {
		async delete (key /* : Key /) / : Promise */ {
		delete this.data[key.toString()]

		setImmediate(() => {
		callback()
		})
		}
		@@ -74,8 +52,8 @@
		},
		commit: (callback /* : Callback<void> /) / : void */ => {
		commit: async () /* : Promise */ => {
		puts.forEach(v => {
		this.data[v[0].toString()] = v[1]
		})
		puts = []

		puts = []
		dels.forEach(key => {
		@@ -85,4 +63,2 @@ delete this.data[key.toString()]
		dels = []

		setImmediate(callback)
		}
		@@ -92,23 +68,17 @@ }

		query (q /* : Query<Buffer> /) / : QueryResult<Buffer> */ {
		let tasks = [pull.keys(this.data), pull.map(k => ({
		key: new Key(k),
		value: this.data[k]
		}))]
		query (q /* : Query<Buffer> /) / : Iterator */ {
		let it = Object.entries(this.data)

		let filters = []
		it = map(it, entry => ({ key: new Key(entry[0]), value: entry[1] }))

		if (q.prefix != null) {
		const prefix = q.prefix
		filters.push((e, cb) => cb(null, e.key.toString().startsWith(prefix)))
		it = filter(it, e => e.key.toString().startsWith(q.prefix))
		}

		if (q.filters != null) {
		filters = filters.concat(q.filters)
		if (Array.isArray(q.filters)) {
		it = q.filters.reduce((it, f) => filter(it, f), it)
		}

		tasks = tasks.concat(filters.map(f => asyncFilter(f)))

		if (q.orders != null) {
		tasks = tasks.concat(q.orders.map(o => asyncSort(o)))
		if (Array.isArray(q.orders)) {
		it = q.orders.reduce((it, f) => sortAll(it, f), it)
		}
		@@ -118,22 +88,19 @@
		let i = 0
		// $FlowFixMe
		tasks.push(pull.filter(() => i++ >= q.offset))
		it = filter(it, () => i++ >= q.offset)
		}

		if (q.limit != null) {
		tasks.push(pull.take(q.limit))
		it = take(it, q.limit)
		}

		if (q.keysOnly === true) {
		tasks.push(pull.map(e => ({ key: e.key })))
		it = map(it, e => ({ key: e.key }))
		}

		return pull.apply(null, tasks)
		return it
		}

		close (callback /* : Callback<void> /) / : void */ {
		setImmediate(callback)
		}
		async close () /* : Promise */ {}
		}

		module.exports = MemoryDatastore

409

src/tests.js

		@@ -9,7 +9,2 @@ /* @flow */
		const expect = chai.expect
		const pull = require('pull-stream')
		const series = require('async/series')
		const parallel = require('async/parallel')
		const map = require('async/map')
		const each = require('async/each')
		const crypto = require('crypto')
		@@ -27,15 +22,6 @@

		const check = (s) => {
		if (s == null) {
		throw new Error('missing store')
		}
		return s
		}

		module.exports = (test/* : Test */) => {
		const cleanup = (store, done) => {
		series([
		(cb) => check(store).close(cb),
		(cb) => test.teardown(cb)
		], done)
		const cleanup = async store => {
		await store.close()
		await test.teardown()
		}
		@@ -46,22 +32,15 @@

		beforeEach((done) => {
		test.setup((err, s) => {
		if (err) {
		throw err
		}
		store = s
		done()
		})
		beforeEach(async () => {
		store = await test.setup()
		if (!store) throw new Error('missing store')
		})

		afterEach((done) => {
		cleanup(store, done)
		})
		afterEach(() => cleanup(store))

		it('simple', (done) => {
		it('simple', () => {
		const k = new Key('/z/one')
		check(store).put(k, Buffer.from('one'), done)
		return store.put(k, Buffer.from('one'))
		})

		it('parallel', (done) => {
		it('parallel', async () => {
		const data = []
		@@ -72,15 +51,7 @@ for (let i = 0; i < 100; i++) {

		each(data, (d, cb) => {
		check(store).put(d[0], d[1], cb)
		}, (err) => {
		expect(err).to.not.exist()
		map(data, (d, cb) => {
		check(store).get(d[0], cb)
		}, (err, res) => {
		expect(err).to.not.exist()
		res.forEach((res, i) => {
		expect(res).to.be.eql(data[i][1])
		})
		done()
		})
		await Promise.all(data.map(d => store.put(d[0], d[1])))
		const res = await Promise.all(data.map(d => store.get(d[0])))

		res.forEach((res, i) => {
		expect(res).to.be.eql(data[i][1])
		})
		@@ -93,35 +64,27 @@ })

		beforeEach((done) => {
		test.setup((err, s) => {
		if (err) {
		throw err
		}
		store = s
		done()
		})
		beforeEach(async () => {
		store = await test.setup()
		if (!store) throw new Error('missing store')
		})

		afterEach((done) => {
		cleanup(store, done)
		})
		afterEach(() => cleanup(store))

		it('simple', (done) => {
		it('simple', async () => {
		const k = new Key('/z/one')
		series([
		(cb) => check(store).put(k, Buffer.from('hello'), cb),
		(cb) => check(store).get(k, (err, res) => {
		expect(err).to.not.exist()
		expect(res).to.be.eql(Buffer.from('hello'))
		cb()
		})
		], done)
		await store.put(k, Buffer.from('hello'))
		const res = await store.get(k)
		expect(res).to.be.eql(Buffer.from('hello'))
		})

		it('should return error with missing key', (done) => {
		it('should throw error for missing key', async () => {
		const k = new Key('/does/not/exist')
		check(store).get(k, (err) => {
		expect(err).to.exist()

		try {
		await store.get(k)
		} catch (err) {
		expect(err).to.have.property('code', 'ERR_NOT_FOUND')
		done()
		})
		return
		}

		throw new Error('expected error to be thrown')
		})
		@@ -133,35 +96,19 @@ })

		beforeEach((done) => {
		test.setup((err, s) => {
		if (err) {
		throw err
		}
		store = s
		done()
		})
		beforeEach(async () => {
		store = await test.setup()
		if (!store) throw new Error('missing store')
		})

		afterEach((done) => {
		cleanup(store, done)
		})
		afterEach(() => cleanup(store))

		it('simple', (done) => {
		it('simple', async () => {
		const k = new Key('/z/one')
		series([
		(cb) => check(store).put(k, Buffer.from('hello'), cb),
		(cb) => check(store).get(k, (err, res) => {
		expect(err).to.not.exist()
		expect(res).to.be.eql(Buffer.from('hello'))
		cb()
		}),
		(cb) => check(store).delete(k, cb),
		(cb) => check(store).has(k, (err, exists) => {
		expect(err).to.not.exist()
		expect(exists).to.be.eql(false)
		cb()
		})
		], done)
		await store.put(k, Buffer.from('hello'))
		await store.get(k)
		await store.delete(k)
		const exists = await store.has(k)
		expect(exists).to.be.eql(false)
		})

		it('parallel', (done) => {
		it('parallel', async () => {
		const data = []
		@@ -172,28 +119,11 @@ for (let i = 0; i < 100; i++) {

		series([
		(cb) => each(data, (d, cb) => {
		check(store).put(d[0], d[1], cb)
		}, cb),
		(cb) => map(data, (d, cb) => {
		check(store).has(d[0], cb)
		}, (err, res) => {
		expect(err).to.not.exist()
		res.forEach((res, i) => {
		expect(res).to.be.eql(true)
		})
		cb()
		}),
		(cb) => each(data, (d, cb) => {
		check(store).delete(d[0], cb)
		}, cb),
		(cb) => map(data, (d, cb) => {
		check(store).has(d[0], cb)
		}, (err, res) => {
		expect(err).to.not.exist()
		res.forEach((res, i) => {
		expect(res).to.be.eql(false)
		})
		cb()
		})
		], done)
		await Promise.all(data.map(d => store.put(d[0], d[1])))

		const res0 = await Promise.all(data.map(d => store.has(d[0])))
		res0.forEach((res, i) => expect(res).to.be.eql(true))

		await Promise.all(data.map(d => store.delete(d[0])))

		const res1 = await Promise.all(data.map(d => store.has(d[0])))
		res1.forEach((res, i) => expect(res).to.be.eql(false))
		})
		@@ -205,43 +135,29 @@ })

		beforeEach((done) => {
		test.setup((err, s) => {
		if (err) {
		throw err
		}
		store = s
		done()
		})
		beforeEach(async () => {
		store = await test.setup()
		if (!store) throw new Error('missing store')
		})

		afterEach((done) => {
		cleanup(store, done)
		})
		afterEach(() => cleanup(store))

		it('simple', (done) => {
		const b = check(store).batch()
		it('simple', async () => {
		const b = store.batch()

		series([
		(cb) => check(store).put(new Key('/z/old'), Buffer.from('old'), cb),
		(cb) => {
		b.put(new Key('/a/one'), Buffer.from('1'))
		b.put(new Key('/q/two'), Buffer.from('2'))
		b.put(new Key('/q/three'), Buffer.from('3'))
		b.delete(new Key('/z/old'))
		b.commit(cb)
		},
		(cb) => map(
		['/a/one', '/q/two', '/q/three', '/z/old'],
		(k, cb) => check(store).has(new Key(k), cb),
		(err, res) => {
		expect(err).to.not.exist()
		expect(res).to.be.eql([true, true, true, false])
		cb()
		}
		)
		], done)
		await store.put(new Key('/z/old'), Buffer.from('old'))

		b.put(new Key('/a/one'), Buffer.from('1'))
		b.put(new Key('/q/two'), Buffer.from('2'))
		b.put(new Key('/q/three'), Buffer.from('3'))
		b.delete(new Key('/z/old'))
		await b.commit()

		const keys = ['/a/one', '/q/two', '/q/three', '/z/old']
		const res = await Promise.all(keys.map(k => store.has(new Key(k))))

		expect(res).to.be.eql([true, true, true, false])
		})

		it('many (3 * 400)', function (done) {
		it('many (3 * 400)', async function () {
		this.timeout(20 * 1000)
		const b = check(store).batch()
		const b = store.batch()
		const count = 400
		@@ -254,16 +170,13 @@ for (let i = 0; i < count; i++) {

		series([
		(cb) => b.commit(cb),
		(cb) => parallel([
		(cb) => pull(check(store).query({prefix: '/a'}), pull.collect(cb)),
		(cb) => pull(check(store).query({prefix: '/z'}), pull.collect(cb)),
		(cb) => pull(check(store).query({prefix: '/q'}), pull.collect(cb))
		], (err, res) => {
		expect(err).to.not.exist()
		expect(res[0]).to.have.length(count)
		expect(res[1]).to.have.length(count)
		expect(res[2]).to.have.length(count)
		cb()
		})
		], done)
		await b.commit()

		const total = async iterable => {
		let count = 0
		for await (const _ of iterable) count++ // eslint-disable-line
		return count
		}

		expect(await total(store.query({ prefix: '/a' }))).to.equal(count)
		expect(await total(store.query({ prefix: '/z' }))).to.equal(count)
		expect(await total(store.query({ prefix: '/q' }))).to.equal(count)
		})
		@@ -274,15 +187,11 @@ })
		let store
		const hello = {key: new Key('/q/1hello'), value: Buffer.from('1')}
		const world = {key: new Key('/z/2world'), value: Buffer.from('2')}
		const hello2 = {key: new Key('/z/3hello2'), value: Buffer.from('3')}
		const filter1 = (entry, cb) => {
		cb(null, !entry.key.toString().endsWith('hello'))
		}
		const hello = { key: new Key('/q/1hello'), value: Buffer.from('1') }
		const world = { key: new Key('/z/2world'), value: Buffer.from('2') }
		const hello2 = { key: new Key('/z/3hello2'), value: Buffer.from('3') }

		const filter2 = (entry, cb) => {
		cb(null, entry.key.toString().endsWith('hello2'))
		}
		const filter1 = async entry => !entry.key.toString().endsWith('hello')
		const filter2 = entry => entry.key.toString().endsWith('hello2')

		const order1 = (res, cb) => {
		cb(null, res.sort((a, b) => {
		const order1 = async res => {
		return res.sort((a, b) => {
		if (a.value.toString() < b.value.toString()) {
		@@ -292,7 +201,7 @@ return -1
		return 1
		}))
		})
		}

		const order2 = (res, cb) => {
		const out = res.sort((a, b) => {
		const order2 = res => {
		return res.sort((a, b) => {
		if (a.value.toString() < b.value.toString()) {
		@@ -306,4 +215,2 @@ return 1
		})

		cb(null, out)
		}
		@@ -313,70 +220,60 @@
		['empty', {}, [hello, world, hello2]],
		['prefix', {prefix: '/z'}, [world, hello2]],
		['1 filter', {filters: [filter1]}, [world, hello2]],
		['2 filters', {filters: [filter1, filter2]}, [hello2]],
		['limit', {limit: 1}, 1],
		['offset', {offset: 1}, 2],
		['keysOnly', {keysOnly: true}, [{key: hello.key}, {key: world.key}, {key: hello2.key}]],
		['1 order (1)', {orders: [order1]}, [hello, world, hello2]],
		['1 order (reverse 1)', {orders: [order2]}, [hello2, world, hello]]
		['prefix', { prefix: '/z' }, [world, hello2]],
		['1 filter', { filters: [filter1] }, [world, hello2]],
		['2 filters', { filters: [filter1, filter2] }, [hello2]],
		['limit', { limit: 1 }, 1],
		['offset', { offset: 1 }, 2],
		['keysOnly', { keysOnly: true }, [{ key: hello.key }, { key: world.key }, { key: hello2.key }]],
		['1 order (1)', { orders: [order1] }, [hello, world, hello2]],
		['1 order (reverse 1)', { orders: [order2] }, [hello2, world, hello]]
		]

		before((done) => {
		test.setup((err, s) => {
		if (err) {
		throw err
		}
		store = s
		before(async () => {
		store = await test.setup()
		if (!store) throw new Error('missing store')

		const b = check(store).batch()
		const b = store.batch()

		b.put(hello.key, hello.value)
		b.put(world.key, world.value)
		b.put(hello2.key, hello2.value)
		b.put(hello.key, hello.value)
		b.put(world.key, world.value)
		b.put(hello2.key, hello2.value)

		b.commit(done)
		})
		return b.commit()
		})

		after((done) => {
		cleanup(store, done)
		})
		after(() => cleanup(store))

		tests.forEach((t) => it(t[0], (done) => {
		pull(
		check(store).query(t[1]),
		pull.collect((err, res) => {
		expect(err).to.not.exist()
		const expected = t[2]
		if (Array.isArray(expected)) {
		if (t[1].orders == null) {
		expect(res).to.have.length(expected.length)
		const s = (a, b) => {
		if (a.key.toString() < b.key.toString()) {
		return 1
		} else {
		return -1
		}
		}
		res = res.sort(s)
		const exp = expected.sort(s)
		tests.forEach(t => it(t[0], async () => {
		let res = []
		for await (const value of store.query(t[1])) res.push(value)

		res.forEach((r, i) => {
		expect(r.key.toString()).to.be.eql(exp[i].key.toString())
		const expected = t[2]
		if (Array.isArray(expected)) {
		if (t[1].orders == null) {
		expect(res).to.have.length(expected.length)
		const s = (a, b) => {
		if (a.key.toString() < b.key.toString()) {
		return 1
		} else {
		return -1
		}
		}
		res = res.sort(s)
		const exp = expected.sort(s)

		if (r.value == null) {
		expect(exp[i].value).to.not.exist()
		} else {
		expect(r.value.equals(exp[i].value)).to.be.eql(true)
		}
		})
		res.forEach((r, i) => {
		expect(r.key.toString()).to.be.eql(exp[i].key.toString())

		if (r.value == null) {
		expect(exp[i].value).to.not.exist()
		} else {
		expect(res).to.be.eql(t[2])
		expect(r.value.equals(exp[i].value)).to.be.eql(true)
		}
		} else if (typeof expected === 'number') {
		expect(res).to.have.length(expected)
		}
		done()
		})
		)
		})
		} else {
		expect(res).to.be.eql(t[2])
		}
		} else if (typeof expected === 'number') {
		expect(res).to.have.length(expected)
		}
		}))
		@@ -387,25 +284,17 @@ })
		let store
		before((done) => {
		test.setup((err, s) => {
		if (err) {
		throw err
		}
		store = s
		done()
		})
		})

		after((done) => {
		cleanup(store, done)
		before(async () => {
		store = await test.setup()
		if (!store) throw new Error('missing store')
		})

		it('close and open', (done) => {
		series([
		(cb) => check(store).close(cb),
		(cb) => check(store).open(cb),
		(cb) => check(store).close(cb),
		(cb) => check(store).open(cb)
		], done)
		after(() => cleanup(store))

		it('close and open', async () => {
		await store.close()
		await store.open()
		await store.close()
		await store.open()
		})
		})
		}

src/utils.js

		'use strict'

		const pull = require('pull-stream')
		const Source = require('pull-defer/source')
		const path = require('path')
		@@ -9,63 +7,41 @@ const os = require('os')

		exports.asyncFilter = function (test) {
		let busy = false
		let abortCb
		let aborted

		return function (read) {
		return function next (abort, cb) {
		if (aborted) return cb(aborted)
		if (abort) {
		aborted = abort
		if (!busy) {
		read(abort, cb)
		} else {
		read(abort, () => {
		// if we are still busy, wait for the test to complete.
		if (busy) abortCb = cb; else cb(abort)
		})
		}
		} else {
		read(null, (end, data) => {
		if (end) cb(end); else if (aborted) cb(aborted); else {
		busy = true
		test(data, (err, valid) => {
		busy = false
		if (aborted) {
		cb(aborted)
		abortCb(aborted)
		} else if (err) {
		next(err, cb)
		} else if (valid) {
		cb(null, data)
		} else {
		next(null, cb)
		}
		})
		}
		})
		}
		exports.filter = (iterable, filterer) => {
		return (async function * () {
		for await (const value of iterable) {
		const keep = await filterer(value)
		if (!keep) continue
		yield value
		}
		}
		})()
		}

		exports.asyncSort = function (sorter) {
		const source = Source()
		// Not just sort, because the sorter is given all the values and should return
		// them all sorted
		exports.sortAll = (iterable, sorter) => {
		return (async function * () {
		let values = []
		for await (const value of iterable) values.push(value)
		values = await sorter(values)
		for (const value of values) yield value
		})()
		}

		const sink = pull.collect((err, ary) => {
		if (err) {
		return source.abort(err)
		exports.take = (iterable, n) => {
		return (async function * () {
		if (n <= 0) return
		let i = 0
		for await (const value of iterable) {
		yield value
		i++
		if (i >= n) return
		}
		sorter(ary, (err, res) => {
		if (err) {
		return source.abort(err)
		}
		source.resolve(pull.values(ary))
		})
		})
		})()
		}

		return function (read) {
		sink(read)
		return source
		}
		exports.map = (iterable, mapper) => {
		return (async function * () {
		for await (const value of iterable) {
		yield mapper(value)
		}
		})()
		}
		@@ -72,0 +48,0 @@

appveyor.yml

circle.yml

.travis.yml

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dist/index.js

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dist/index.js.map

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dist/index.min.js.map

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