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519 lines
20 KiB
519 lines
20 KiB
/* eslint-env mocha */
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const testDb = 'workspace/test.db'
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const { promises: fs } = require('fs')
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const assert = require('assert').strict
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const path = require('path')
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const Datastore = require('../lib/datastore')
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const Persistence = require('../lib/persistence')
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const Cursor = require('../lib/cursor')
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const { exists } = require('./utils.test.js')
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describe('Cursor Async', function () {
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let d
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beforeEach(async () => {
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d = new Datastore({ filename: testDb })
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assert.equal(d.filename, testDb)
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assert.equal(d.inMemoryOnly, false)
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await Persistence.ensureDirectoryExistsAsync(path.dirname(testDb))
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if (await exists(testDb)) await fs.unlink(testDb)
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await d.loadDatabaseAsync()
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assert.equal(d.getAllData().length, 0)
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})
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describe('Without sorting', function () {
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beforeEach(async () => {
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await d.insertAsync({ age: 5 })
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await d.insertAsync({ age: 57 })
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await d.insertAsync({ age: 52 })
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await d.insertAsync({ age: 23 })
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await d.insertAsync({ age: 89 })
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})
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it('Without query, an empty query or a simple query and no skip or limit', async () => {
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const cursor = new Cursor(d)
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const docs = await cursor
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assert.equal(docs.length, 5)
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assert.equal(docs.filter(function (doc) { return doc.age === 5 })[0].age, 5)
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assert.equal(docs.filter(function (doc) { return doc.age === 57 })[0].age, 57)
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assert.equal(docs.filter(function (doc) { return doc.age === 52 })[0].age, 52)
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assert.equal(docs.filter(function (doc) { return doc.age === 23 })[0].age, 23)
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assert.equal(docs.filter(function (doc) { return doc.age === 89 })[0].age, 89)
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const cursor2 = new Cursor(d, {})
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const docs2 = await cursor2
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assert.equal(docs2.length, 5)
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assert.equal(docs2.filter(function (doc) { return doc.age === 5 })[0].age, 5)
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assert.equal(docs2.filter(function (doc) { return doc.age === 57 })[0].age, 57)
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assert.equal(docs2.filter(function (doc) { return doc.age === 52 })[0].age, 52)
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assert.equal(docs2.filter(function (doc) { return doc.age === 23 })[0].age, 23)
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assert.equal(docs2.filter(function (doc) { return doc.age === 89 })[0].age, 89)
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const cursor3 = new Cursor(d, { age: { $gt: 23 } })
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const docs3 = await cursor3
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assert.equal(docs3.length, 3)
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assert.equal(docs3.filter(function (doc) { return doc.age === 57 })[0].age, 57)
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assert.equal(docs3.filter(function (doc) { return doc.age === 52 })[0].age, 52)
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assert.equal(docs3.filter(function (doc) { return doc.age === 89 })[0].age, 89)
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})
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it('With an empty collection', async () => {
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await d.removeAsync({}, { multi: true })
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const cursor = new Cursor(d)
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const docs = await cursor
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assert.equal(docs.length, 0)
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})
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it('With a limit', async () => {
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const cursor = new Cursor(d)
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cursor.limit(3)
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const docs = await cursor
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assert.equal(docs.length, 3)
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// No way to predict which results are returned of course ...
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})
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it('With a skip', async () => {
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const cursor = new Cursor(d)
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const docs = await cursor.skip(2)
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assert.equal(docs.length, 3)
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// No way to predict which results are returned of course ...
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})
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it('With a limit and a skip and method chaining', async () => {
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const cursor = new Cursor(d)
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cursor.limit(4).skip(3) // Only way to know that the right number of results was skipped is if limit + skip > number of results
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const docs = await cursor
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assert.equal(docs.length, 2)
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// No way to predict which results are returned of course ...
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})
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}) // ===== End of 'Without sorting' =====
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describe('Sorting of the results', function () {
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beforeEach(async () => {
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// We don't know the order in which docs will be inserted but we ensure correctness by testing both sort orders
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await d.insertAsync({ age: 5 })
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await d.insertAsync({ age: 57 })
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await d.insertAsync({ age: 52 })
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await d.insertAsync({ age: 23 })
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await d.insertAsync({ age: 89 })
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})
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it('Using one sort', async () => {
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const cursor = new Cursor(d, {})
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cursor.sort({ age: 1 })
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const docs = await cursor
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// Results are in ascending order
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for (let i = 0; i < docs.length - 1; i += 1) {
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assert(docs[i].age < docs[i + 1].age)
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}
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cursor.sort({ age: -1 })
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const docs2 = await cursor
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// Results are in descending order
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for (let i = 0; i < docs2.length - 1; i += 1) {
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assert(docs2[i].age > docs2[i + 1].age)
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}
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})
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it('Sorting strings with custom string comparison function', async () => {
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const db = new Datastore({
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inMemoryOnly: true,
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autoload: true,
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compareStrings: function (a, b) { return a.length - b.length }
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})
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await db.insertAsync({ name: 'alpha' })
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await db.insertAsync({ name: 'charlie' })
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await db.insertAsync({ name: 'zulu' })
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const docs = await db.findAsync({}).sort({ name: 1 })
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assert.equal(docs.map(x => x.name)[0], 'zulu')
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assert.equal(docs.map(x => x.name)[1], 'alpha')
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assert.equal(docs.map(x => x.name)[2], 'charlie')
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delete db.compareStrings
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const docs2 = await db.findAsync({}).sort({ name: 1 })
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assert.equal(docs2.map(x => x.name)[0], 'alpha')
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assert.equal(docs2.map(x => x.name)[1], 'charlie')
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assert.equal(docs2.map(x => x.name)[2], 'zulu')
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})
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it('With an empty collection', async () => {
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await d.removeAsync({}, { multi: true })
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const cursor = new Cursor(d)
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cursor.sort({ age: 1 })
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const docs = await cursor
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assert.equal(docs.length, 0)
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})
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it('Ability to chain sorting and exec', async () => {
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const cursor = new Cursor(d)
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const docs = await cursor.sort({ age: 1 })
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// Results are in ascending order
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for (let i = 0; i < docs.length - 1; i += 1) {
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assert.ok(docs[i].age < docs[i + 1].age)
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}
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const cursor2 = new Cursor(d)
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const docs2 = await cursor2.sort({ age: -1 })
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// Results are in descending order
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for (let i = 0; i < docs2.length - 1; i += 1) {
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assert(docs2[i].age > docs2[i + 1].age)
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}
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})
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it('Using limit and sort', async () => {
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const cursor = new Cursor(d)
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const docs = await cursor.sort({ age: 1 }).limit(3)
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assert.equal(docs.length, 3)
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assert.equal(docs[0].age, 5)
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assert.equal(docs[1].age, 23)
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assert.equal(docs[2].age, 52)
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const cursor2 = new Cursor(d)
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const docs2 = await cursor2.sort({ age: -1 }).limit(2)
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assert.equal(docs2.length, 2)
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assert.equal(docs2[0].age, 89)
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assert.equal(docs2[1].age, 57)
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})
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it('Using a limit higher than total number of docs shouldn\'t cause an error', async () => {
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const cursor = new Cursor(d)
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const docs = await cursor.sort({ age: 1 }).limit(7)
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assert.equal(docs.length, 5)
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assert.equal(docs[0].age, 5)
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assert.equal(docs[1].age, 23)
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assert.equal(docs[2].age, 52)
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assert.equal(docs[3].age, 57)
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assert.equal(docs[4].age, 89)
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})
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it('Using limit and skip with sort', async () => {
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const cursor = new Cursor(d)
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const docs = await cursor.sort({ age: 1 }).limit(1).skip(2)
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assert.equal(docs.length, 1)
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assert.equal(docs[0].age, 52)
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const cursor2 = new Cursor(d)
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const docs2 = await cursor2.sort({ age: 1 }).limit(3).skip(1)
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assert.equal(docs2.length, 3)
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assert.equal(docs2[0].age, 23)
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assert.equal(docs2[1].age, 52)
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assert.equal(docs2[2].age, 57)
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const cursor3 = new Cursor(d)
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const docs3 = await cursor3.sort({ age: -1 }).limit(2).skip(2)
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assert.equal(docs3.length, 2)
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assert.equal(docs3[0].age, 52)
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assert.equal(docs3[1].age, 23)
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})
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it('Using too big a limit and a skip with sort', async () => {
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const cursor = new Cursor(d)
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const docs = await cursor.sort({ age: 1 }).limit(8).skip(2)
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assert.equal(docs.length, 3)
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assert.equal(docs[0].age, 52)
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assert.equal(docs[1].age, 57)
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assert.equal(docs[2].age, 89)
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})
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it('Using too big a skip with sort should return no result', async () => {
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const cursor = new Cursor(d)
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const docs = await cursor.sort({ age: 1 }).skip(5)
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assert.equal(docs.length, 0)
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const cursor2 = new Cursor(d)
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const docs2 = await cursor2.sort({ age: 1 }).skip(7)
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assert.equal(docs2.length, 0)
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const cursor3 = new Cursor(d)
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const docs3 = await cursor3.sort({ age: 1 }).limit(3).skip(7)
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assert.equal(docs3.length, 0)
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const cursor4 = new Cursor(d)
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const docs4 = await cursor4.sort({ age: 1 }).limit(6).skip(7)
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assert.equal(docs4.length, 0)
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})
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it('Sorting strings', async () => {
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await d.removeAsync({}, { multi: true })
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await d.insertAsync({ name: 'jako' })
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await d.insertAsync({ name: 'jakeb' })
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await d.insertAsync({ name: 'sue' })
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const cursor = new Cursor(d, {})
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const docs = await cursor.sort({ name: 1 })
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assert.equal(docs.length, 3)
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assert.equal(docs[0].name, 'jakeb')
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assert.equal(docs[1].name, 'jako')
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assert.equal(docs[2].name, 'sue')
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const cursor2 = new Cursor(d, {})
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const docs2 = await cursor2.sort({ name: -1 })
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assert.equal(docs2.length, 3)
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assert.equal(docs2[0].name, 'sue')
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assert.equal(docs2[1].name, 'jako')
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assert.equal(docs2[2].name, 'jakeb')
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})
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it('Sorting nested fields with dates', async () => {
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await d.removeAsync({}, { multi: true })
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const doc1 = await d.insertAsync({ event: { recorded: new Date(400) } })
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const doc2 = await d.insertAsync({ event: { recorded: new Date(60000) } })
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const doc3 = await d.insertAsync({ event: { recorded: new Date(32) } })
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const cursor = new Cursor(d, {})
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const docs = await cursor.sort({ 'event.recorded': 1 })
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assert.equal(docs.length, 3)
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assert.equal(docs[0]._id, doc3._id)
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assert.equal(docs[1]._id, doc1._id)
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assert.equal(docs[2]._id, doc2._id)
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const cursor2 = new Cursor(d, {})
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const docs2 = await cursor2.sort({ 'event.recorded': -1 })
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assert.equal(docs2.length, 3)
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assert.equal(docs2[0]._id, doc2._id)
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assert.equal(docs2[1]._id, doc1._id)
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assert.equal(docs2[2]._id, doc3._id)
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})
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it('Sorting when some fields are undefined', async () => {
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await d.removeAsync({}, { multi: true })
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await d.insertAsync({ name: 'jako', other: 2 })
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await d.insertAsync({ name: 'jakeb', other: 3 })
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await d.insertAsync({ name: 'sue' })
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await d.insertAsync({ name: 'henry', other: 4 })
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const cursor = new Cursor(d, {})
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// eslint-disable-next-line node/handle-callback-err
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const docs = await cursor.sort({ other: 1 })
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assert.equal(docs.length, 4)
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assert.equal(docs[0].name, 'sue')
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assert.equal(docs[0].other, undefined)
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assert.equal(docs[1].name, 'jako')
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assert.equal(docs[1].other, 2)
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assert.equal(docs[2].name, 'jakeb')
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assert.equal(docs[2].other, 3)
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assert.equal(docs[3].name, 'henry')
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assert.equal(docs[3].other, 4)
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const cursor2 = new Cursor(d, { name: { $in: ['suzy', 'jakeb', 'jako'] } })
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const docs2 = await cursor2.sort({ other: -1 })
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assert.equal(docs2.length, 2)
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assert.equal(docs2[0].name, 'jakeb')
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assert.equal(docs2[0].other, 3)
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assert.equal(docs2[1].name, 'jako')
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assert.equal(docs2[1].other, 2)
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})
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it('Sorting when all fields are undefined', async () => {
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await d.removeAsync({}, { multi: true })
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await d.insertAsync({ name: 'jako' })
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await d.insertAsync({ name: 'jakeb' })
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await d.insertAsync({ name: 'sue' })
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const cursor = new Cursor(d, {})
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const docs = await cursor.sort({ other: 1 })
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assert.equal(docs.length, 3)
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const cursor2 = new Cursor(d, { name: { $in: ['sue', 'jakeb', 'jakob'] } })
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const docs2 = await cursor2.sort({ other: -1 })
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assert.equal(docs2.length, 2)
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})
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it('Multiple consecutive sorts', async () => {
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await d.removeAsync({}, { multi: true })
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await d.insertAsync({ name: 'jako', age: 43, nid: 1 })
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await d.insertAsync({ name: 'jakeb', age: 43, nid: 2 })
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await d.insertAsync({ name: 'sue', age: 12, nid: 3 })
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await d.insertAsync({ name: 'zoe', age: 23, nid: 4 })
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await d.insertAsync({ name: 'jako', age: 35, nid: 5 })
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const cursor = new Cursor(d, {})
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// eslint-disable-next-line node/handle-callback-err
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const docs = await cursor.sort({ name: 1, age: -1 })
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assert.equal(docs.length, 5)
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assert.equal(docs[0].nid, 2)
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assert.equal(docs[1].nid, 1)
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assert.equal(docs[2].nid, 5)
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assert.equal(docs[3].nid, 3)
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assert.equal(docs[4].nid, 4)
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const cursor2 = new Cursor(d, {})
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const docs2 = await cursor2.sort({ name: 1, age: 1 })
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assert.equal(docs2.length, 5)
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assert.equal(docs2[0].nid, 2)
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assert.equal(docs2[1].nid, 5)
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assert.equal(docs2[2].nid, 1)
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assert.equal(docs2[3].nid, 3)
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assert.equal(docs2[4].nid, 4)
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const cursor3 = new Cursor(d, {})
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const docs3 = await cursor3.sort({ age: 1, name: 1 })
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assert.equal(docs3.length, 5)
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assert.equal(docs3[0].nid, 3)
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assert.equal(docs3[1].nid, 4)
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assert.equal(docs3[2].nid, 5)
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assert.equal(docs3[3].nid, 2)
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assert.equal(docs3[4].nid, 1)
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const cursor4 = new Cursor(d, {})
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const docs4 = await cursor4.sort({ age: 1, name: -1 })
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assert.equal(docs4.length, 5)
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assert.equal(docs4[0].nid, 3)
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assert.equal(docs4[1].nid, 4)
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assert.equal(docs4[2].nid, 5)
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assert.equal(docs4[3].nid, 1)
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assert.equal(docs4[4].nid, 2)
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})
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it('Similar data, multiple consecutive sorts', async () => {
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let id
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const companies = ['acme', 'milkman', 'zoinks']
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const entities = []
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await d.removeAsync({}, { multi: true })
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id = 1
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for (let i = 0; i < companies.length; i++) {
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for (let j = 5; j <= 100; j += 5) {
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entities.push({
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company: companies[i],
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cost: j,
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nid: id
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})
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id++
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}
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}
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await Promise.all(entities.map(entity => d.insertAsync(entity)))
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const cursor = new Cursor(d, {})
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const docs = await cursor.sort({ company: 1, cost: 1 })
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assert.equal(docs.length, 60)
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for (let i = 0; i < docs.length; i++) {
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assert.equal(docs[i].nid, i + 1)
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}
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})
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}) // ===== End of 'Sorting' =====
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describe('Projections', function () {
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let doc1
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let doc2
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let doc3
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let doc4
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let doc0
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beforeEach(async () => {
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// We don't know the order in which docs will be inserted but we ensure correctness by testing both sort orders
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doc0 = await d.insertAsync({ age: 5, name: 'Jo', planet: 'B', toys: { bebe: true, ballon: 'much' } })
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doc1 = await d.insertAsync({ age: 57, name: 'Louis', planet: 'R', toys: { ballon: 'yeah', bebe: false } })
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doc2 = await d.insertAsync({ age: 52, name: 'Grafitti', planet: 'C', toys: { bebe: 'kind of' } })
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doc3 = await d.insertAsync({ age: 23, name: 'LM', planet: 'S' })
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doc4 = await d.insertAsync({ age: 89, planet: 'Earth' })
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})
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it('Takes all results if no projection or empty object given', async () => {
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const cursor = new Cursor(d, {})
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cursor.sort({ age: 1 }) // For easier finding
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const docs = await cursor
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assert.equal(docs.length, 5)
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assert.deepStrictEqual(docs[0], doc0)
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assert.deepStrictEqual(docs[1], doc3)
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assert.deepStrictEqual(docs[2], doc2)
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assert.deepStrictEqual(docs[3], doc1)
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assert.deepStrictEqual(docs[4], doc4)
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cursor.projection({})
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const docs2 = await cursor
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assert.equal(docs2.length, 5)
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assert.deepStrictEqual(docs2[0], doc0)
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assert.deepStrictEqual(docs2[1], doc3)
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assert.deepStrictEqual(docs2[2], doc2)
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assert.deepStrictEqual(docs2[3], doc1)
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assert.deepStrictEqual(docs2[4], doc4)
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})
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it('Can take only the expected fields', async () => {
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const cursor = new Cursor(d, {})
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cursor.sort({ age: 1 }) // For easier finding
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cursor.projection({ age: 1, name: 1 })
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const docs = await cursor
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assert.equal(docs.length, 5)
|
|
// Takes the _id by default
|
|
assert.deepStrictEqual(docs[0], { age: 5, name: 'Jo', _id: doc0._id })
|
|
assert.deepStrictEqual(docs[1], { age: 23, name: 'LM', _id: doc3._id })
|
|
assert.deepStrictEqual(docs[2], { age: 52, name: 'Grafitti', _id: doc2._id })
|
|
assert.deepStrictEqual(docs[3], { age: 57, name: 'Louis', _id: doc1._id })
|
|
assert.deepStrictEqual(docs[4], { age: 89, _id: doc4._id }) // No problems if one field to take doesn't exist
|
|
|
|
cursor.projection({ age: 1, name: 1, _id: 0 })
|
|
const docs2 = await cursor
|
|
assert.equal(docs2.length, 5)
|
|
assert.deepStrictEqual(docs2[0], { age: 5, name: 'Jo' })
|
|
assert.deepStrictEqual(docs2[1], { age: 23, name: 'LM' })
|
|
assert.deepStrictEqual(docs2[2], { age: 52, name: 'Grafitti' })
|
|
assert.deepStrictEqual(docs2[3], { age: 57, name: 'Louis' })
|
|
assert.deepStrictEqual(docs2[4], { age: 89 }) // No problems if one field to take doesn't exist
|
|
})
|
|
|
|
it('Can omit only the expected fields', async () => {
|
|
const cursor = new Cursor(d, {})
|
|
cursor.sort({ age: 1 }) // For easier finding
|
|
cursor.projection({ age: 0, name: 0 })
|
|
const docs = await cursor
|
|
assert.equal(docs.length, 5)
|
|
// Takes the _id by default
|
|
assert.deepStrictEqual(docs[0], { planet: 'B', _id: doc0._id, toys: { bebe: true, ballon: 'much' } })
|
|
assert.deepStrictEqual(docs[1], { planet: 'S', _id: doc3._id })
|
|
assert.deepStrictEqual(docs[2], { planet: 'C', _id: doc2._id, toys: { bebe: 'kind of' } })
|
|
assert.deepStrictEqual(docs[3], { planet: 'R', _id: doc1._id, toys: { bebe: false, ballon: 'yeah' } })
|
|
assert.deepStrictEqual(docs[4], { planet: 'Earth', _id: doc4._id })
|
|
|
|
cursor.projection({ age: 0, name: 0, _id: 0 })
|
|
const docs2 = await cursor
|
|
assert.equal(docs2.length, 5)
|
|
assert.deepStrictEqual(docs2[0], { planet: 'B', toys: { bebe: true, ballon: 'much' } })
|
|
assert.deepStrictEqual(docs2[1], { planet: 'S' })
|
|
assert.deepStrictEqual(docs2[2], { planet: 'C', toys: { bebe: 'kind of' } })
|
|
assert.deepStrictEqual(docs2[3], { planet: 'R', toys: { bebe: false, ballon: 'yeah' } })
|
|
assert.deepStrictEqual(docs2[4], { planet: 'Earth' })
|
|
})
|
|
|
|
it('Cannot use both modes except for _id', async () => {
|
|
const cursor = new Cursor(d, {})
|
|
cursor.sort({ age: 1 }) // For easier finding
|
|
cursor.projection({ age: 1, name: 0 })
|
|
await assert.rejects(() => cursor)
|
|
|
|
cursor.projection({ age: 1, _id: 0 })
|
|
const docs = await cursor
|
|
assert.deepStrictEqual(docs[0], { age: 5 })
|
|
assert.deepStrictEqual(docs[1], { age: 23 })
|
|
assert.deepStrictEqual(docs[2], { age: 52 })
|
|
assert.deepStrictEqual(docs[3], { age: 57 })
|
|
assert.deepStrictEqual(docs[4], { age: 89 })
|
|
|
|
cursor.projection({ age: 0, toys: 0, planet: 0, _id: 1 })
|
|
const docs2 = await cursor
|
|
assert.deepStrictEqual(docs2[0], { name: 'Jo', _id: doc0._id })
|
|
assert.deepStrictEqual(docs2[1], { name: 'LM', _id: doc3._id })
|
|
assert.deepStrictEqual(docs2[2], { name: 'Grafitti', _id: doc2._id })
|
|
assert.deepStrictEqual(docs2[3], { name: 'Louis', _id: doc1._id })
|
|
assert.deepStrictEqual(docs2[4], { _id: doc4._id })
|
|
})
|
|
|
|
it('Projections on embedded documents - omit type', async () => {
|
|
const cursor = new Cursor(d, {})
|
|
cursor.sort({ age: 1 }) // For easier finding
|
|
cursor.projection({ name: 0, planet: 0, 'toys.bebe': 0, _id: 0 })
|
|
const docs = await cursor
|
|
assert.deepStrictEqual(docs[0], { age: 5, toys: { ballon: 'much' } })
|
|
assert.deepStrictEqual(docs[1], { age: 23 })
|
|
assert.deepStrictEqual(docs[2], { age: 52, toys: {} })
|
|
assert.deepStrictEqual(docs[3], { age: 57, toys: { ballon: 'yeah' } })
|
|
assert.deepStrictEqual(docs[4], { age: 89 })
|
|
})
|
|
|
|
it('Projections on embedded documents - pick type', async () => {
|
|
const cursor = new Cursor(d, {})
|
|
cursor.sort({ age: 1 }) // For easier finding
|
|
cursor.projection({ name: 1, 'toys.ballon': 1, _id: 0 })
|
|
const docs = await cursor
|
|
assert.deepStrictEqual(docs[0], { name: 'Jo', toys: { ballon: 'much' } })
|
|
assert.deepStrictEqual(docs[1], { name: 'LM' })
|
|
assert.deepStrictEqual(docs[2], { name: 'Grafitti' })
|
|
assert.deepStrictEqual(docs[3], { name: 'Louis', toys: { ballon: 'yeah' } })
|
|
assert.deepStrictEqual(docs[4], {})
|
|
})
|
|
}) // ==== End of 'Projections' ====
|
|
})
|
|
|