105 lines
3.2 KiB
JavaScript
105 lines
3.2 KiB
JavaScript
'use strict'
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const { test } = require('tap')
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const CorkedEmitter = require('../lib/corked_emitter')
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function gatherEventSequence (expectedNumber) {
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const gatheredEvents = []
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let callback
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const finished = new Promise(function (resolve) {
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callback = function (...args) {
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gatheredEvents.push(...args)
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if (gatheredEvents.length >= expectedNumber) {
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// Prevent result mutation after our promise is resolved:
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resolve(gatheredEvents.slice())
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}
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}
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})
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return {
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finished,
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callback
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}
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}
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test('normal emit flow', function (t) {
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const emitter = new CorkedEmitter()
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const expectedSequence = [
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['searchEntry', { data: 'a' }],
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['searchEntry', { data: 'b' }],
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['end']
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]
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const gatherer = gatherEventSequence(3)
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emitter.on('searchEntry', function (...args) {
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gatherer.callback(['searchEntry', ...args])
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})
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emitter.on('end', function (...args) {
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gatherer.callback(['end', ...args])
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})
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emitter.emit('searchEntry', { data: 'a' })
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emitter.emit('searchEntry', { data: 'b' })
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emitter.emit('end')
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gatherer.finished.then(function (gatheredEvents) {
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expectedSequence.forEach(function (expectedEvent, i) {
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t.equal(JSON.stringify(expectedEvent), JSON.stringify(gatheredEvents[i]))
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})
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t.end()
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})
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})
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test('reversed listener registration', function (t) {
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const emitter = new CorkedEmitter()
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const expectedSequence = [
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['searchEntry', { data: 'a' }],
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['searchEntry', { data: 'b' }],
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['end']
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]
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const gatherer = gatherEventSequence(3)
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// This time, we swap the event listener registrations.
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// The order of emits should remain unchanged.
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emitter.on('end', function (...args) {
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gatherer.callback(['end', ...args])
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})
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emitter.on('searchEntry', function (...args) {
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gatherer.callback(['searchEntry', ...args])
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})
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emitter.emit('searchEntry', { data: 'a' })
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emitter.emit('searchEntry', { data: 'b' })
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emitter.emit('end')
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gatherer.finished.then(function (gatheredEvents) {
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expectedSequence.forEach(function (expectedEvent, i) {
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t.equal(JSON.stringify(expectedEvent), JSON.stringify(gatheredEvents[i]))
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})
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t.end()
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})
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})
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test('delayed listener registration', function (t) {
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const emitter = new CorkedEmitter()
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const expectedSequence = [
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['searchEntry', { data: 'a' }],
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['searchEntry', { data: 'b' }],
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['end']
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]
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const gatherer = gatherEventSequence(3)
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emitter.emit('searchEntry', { data: 'a' })
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emitter.emit('searchEntry', { data: 'b' })
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emitter.emit('end')
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// The listeners only appear after a brief delay - this simulates
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// the situation described in https://github.com/ldapjs/node-ldapjs/issues/602
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// and in https://github.com/ifroz/node-ldapjs/commit/5239f6c68827f2c25b4589089c199d15bb882412
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setTimeout(function () {
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emitter.on('end', function (...args) {
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gatherer.callback(['end', ...args])
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})
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emitter.on('searchEntry', function (...args) {
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gatherer.callback(['searchEntry', ...args])
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})
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}, 50)
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gatherer.finished.then(function (gatheredEvents) {
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expectedSequence.forEach(function (expectedEvent, i) {
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t.equal(JSON.stringify(expectedEvent), JSON.stringify(gatheredEvents[i]))
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})
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t.end()
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})
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})
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