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streams.js
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streams.js
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var dat = require('../')
var tape = require('tape')
var collect = require('stream-collector')
var memdb = require('memdb')
var create = function () {
return dat(memdb(), {valueEncoding: 'utf-8'})
}
tape('read-stream', function (t) {
var db = create()
db.put('hello', 'world', function () {
collect(db.createReadStream(), function (err, list) {
t.error(err, 'no err')
t.same(list.length, 1)
t.same(list[0].content, 'row')
t.ok(list[0].version, 'has version')
t.same(list[0].key, 'hello')
t.same(list[0].value, 'world')
t.end()
})
})
})
tape('read-stream more than one value', function (t) {
var db = create()
db.put('hello', 'world', function () {
db.put('hej', 'verden', function () {
collect(db.createReadStream(), function (err, list) {
t.error(err, 'no err')
t.same(list.length, 2)
t.same(list[0].content, 'row')
t.ok(list[0].version, 'has version')
t.same(list[0].key, 'hej')
t.same(list[0].value, 'verden')
t.same(list[1].content, 'row')
t.ok(list[1].version, 'has version')
t.same(list[1].key, 'hello')
t.same(list[1].value, 'world')
t.end()
})
})
})
})
tape('read-stream keys are sorted', function (t) {
var db = create()
db.put('c', 'c', function () {
db.put('a', 'a', function () {
db.put('b', 'b', function () {
collect(db.createKeyStream(), function (err, list) {
t.error(err, 'no err')
t.same(list, ['a', 'b', 'c'])
t.end()
})
})
})
})
})
tape('read-stream with a limit', function (t) {
var db = create()
db.put('c', 'c', function () {
db.put('a', 'a', function () {
db.put('b', 'b', function () {
collect(db.createKeyStream({limit: 2}), function (err, list) {
t.error(err, 'no err')
t.same(list, ['a', 'b'])
t.end()
})
})
})
})
})
tape('write-stream', function (t) {
var db = create()
var ws = db.createWriteStream()
ws.write({key: 'a', value: 'a'})
ws.write({key: 'b', value: 'b'})
ws.write({key: 'c', value: 'c'})
ws.end(function () {
collect(db.createKeyStream(), function (err, list) {
t.error(err, 'no err')
t.same(list, ['a', 'b', 'c'])
t.end()
})
})
})
tape('write-stream two batches', function (t) {
var db = create()
var ws = db.createWriteStream({batchSize: 2})
ws.write({key: 'a', value: 'a'})
ws.write({key: 'b', value: 'b'})
ws.write({key: 'c', value: 'c'})
ws.end(function () {
collect(db.createKeyStream(), function (err, list) {
t.error(err, 'no err')
t.same(list, ['a', 'b', 'c'])
t.end()
})
})
})