overleaf/services/web/test/frontend/features/chat/context/chat-context.test.js
Alf Eaton 7c97f8ab6e Switch to new JSX runtime (#4225)
* Use new JSX runtime and update Babel Node target
* Update .eslintrc
* Remove React imports

GitOrigin-RevId: 559de0267f8f2934c56a860ea8701bb522aa861a
2021-06-24 02:06:59 +00:00

506 lines
15 KiB
JavaScript

// Disable prop type checks for test harnesses
/* eslint-disable react/prop-types */
import { renderHook, act } from '@testing-library/react-hooks/dom'
import { expect } from 'chai'
import fetchMock from 'fetch-mock'
import EventEmitter from 'events'
import { useChatContext } from '../../../../../frontend/js/features/chat/context/chat-context'
import {
ChatProviders,
cleanUpContext,
} from '../../../helpers/render-with-context'
import { stubMathJax, tearDownMathJaxStubs } from '../components/stubs'
describe('ChatContext', function () {
const user = {
id: 'fake_user',
first_name: 'fake_user_first_name',
email: 'fake@example.com',
}
beforeEach(function () {
fetchMock.reset()
cleanUpContext()
stubMathJax()
})
afterEach(function () {
tearDownMathJaxStubs()
})
describe('socket connection', function () {
beforeEach(function () {
// Mock GET messages to return no messages
fetchMock.get('express:/project/:projectId/messages', [])
// Mock POST new message to return 200
fetchMock.post('express:/project/:projectId/messages', 200)
})
it('subscribes when mounted', function () {
const socket = new EventEmitter()
renderChatContextHook({ user, socket })
// Assert that there is 1 listener
expect(socket.rawListeners('new-chat-message').length).to.equal(1)
})
it('unsubscribes when unmounted', function () {
const socket = new EventEmitter()
const { unmount } = renderChatContextHook({ user, socket })
unmount()
// Assert that there is 0 listeners
expect(socket.rawListeners('new-chat-message').length).to.equal(0)
})
it('adds received messages to the list', async function () {
// Mock socket: we only need to emit events, not mock actual connections
const socket = new EventEmitter()
const { result, waitForNextUpdate } = renderChatContextHook({
user,
socket,
})
// Wait until initial messages have loaded
result.current.loadInitialMessages()
await waitForNextUpdate()
// No messages shown at first
expect(result.current.messages).to.deep.equal([])
// Mock message being received from another user
socket.emit('new-chat-message', {
id: 'msg_1',
content: 'new message',
timestamp: Date.now(),
user: {
id: 'another_fake_user',
first_name: 'another_fake_user_first_name',
email: 'another_fake@example.com',
},
})
const message = result.current.messages[0]
expect(message.id).to.equal('msg_1')
expect(message.contents).to.deep.equal(['new message'])
})
it("doesn't add received messages from the current user if a message was just sent", async function () {
const socket = new EventEmitter()
const { result, waitForNextUpdate } = renderChatContextHook({
user,
socket,
})
// Wait until initial messages have loaded
result.current.loadInitialMessages()
await waitForNextUpdate()
// Send a message from the current user
result.current.sendMessage('sent message')
// Receive a message from the current user
socket.emit('new-chat-message', {
id: 'msg_1',
content: 'received message',
timestamp: Date.now(),
user,
})
// Expect that the sent message is shown, but the new message is not
const messageContents = result.current.messages.map(
({ contents }) => contents[0]
)
expect(messageContents).to.include('sent message')
expect(messageContents).to.not.include('received message')
})
it('adds the new message from the current user if another message was received after sending', async function () {
const socket = new EventEmitter()
const { result, waitForNextUpdate } = renderChatContextHook({
user,
socket,
})
// Wait until initial messages have loaded
result.current.loadInitialMessages()
await waitForNextUpdate()
// Send a message from the current user
result.current.sendMessage('sent message from current user')
const [sentMessageFromCurrentUser] = result.current.messages
expect(sentMessageFromCurrentUser.contents).to.deep.equal([
'sent message from current user',
])
act(() => {
// Receive a message from another user.
socket.emit('new-chat-message', {
id: 'msg_1',
content: 'new message from other user',
timestamp: Date.now(),
user: {
id: 'another_fake_user',
first_name: 'another_fake_user_first_name',
email: 'another_fake@example.com',
},
})
})
const [, messageFromOtherUser] = result.current.messages
expect(messageFromOtherUser.contents).to.deep.equal([
'new message from other user',
])
// Receive a message from the current user
socket.emit('new-chat-message', {
id: 'msg_2',
content: 'received message from current user',
timestamp: Date.now(),
user,
})
// Since the current user didn't just send a message, it is now shown
const [, , receivedMessageFromCurrentUser] = result.current.messages
expect(receivedMessageFromCurrentUser.contents).to.deep.equal([
'received message from current user',
])
})
})
describe('loadInitialMessages', function () {
beforeEach(function () {
fetchMock.get('express:/project/:projectId/messages', [
{
id: 'msg_1',
content: 'a message',
user,
timestamp: Date.now(),
},
])
})
it('adds messages to the list', async function () {
const { result, waitForNextUpdate } = renderChatContextHook({ user })
result.current.loadInitialMessages()
await waitForNextUpdate()
expect(result.current.messages[0].contents).to.deep.equal(['a message'])
})
it("won't load messages a second time", async function () {
const { result, waitForNextUpdate } = renderChatContextHook({ user })
result.current.loadInitialMessages()
await waitForNextUpdate()
expect(result.current.initialMessagesLoaded).to.equal(true)
// Calling a second time won't do anything
result.current.loadInitialMessages()
expect(fetchMock.calls()).to.have.lengthOf(1)
})
it('provides an error on failure', async function () {
fetchMock.reset()
fetchMock.get('express:/project/:projectId/messages', 500)
const { result, waitForNextUpdate } = renderChatContextHook({ user })
result.current.loadInitialMessages()
await waitForNextUpdate()
expect(result.current.error).to.exist
expect(result.current.status).to.equal('error')
})
})
describe('loadMoreMessages', function () {
it('adds messages to the list', async function () {
// Mock a GET request for an initial message
fetchMock.getOnce('express:/project/:projectId/messages', [
{
id: 'msg_1',
content: 'first message',
user,
timestamp: new Date('2021-03-04T10:00:00').getTime(),
},
])
const { result, waitForNextUpdate } = renderChatContextHook({ user })
result.current.loadMoreMessages()
await waitForNextUpdate()
expect(result.current.messages[0].contents).to.deep.equal([
'first message',
])
// The before query param is not set
expect(getLastFetchMockQueryParam('before')).to.be.null
})
it('adds more messages if called a second time', async function () {
// Mock 2 GET requests, with different content
fetchMock
.getOnce(
'express:/project/:projectId/messages',
// Resolve a full "page" of messages (50)
createMessages(50, user, new Date('2021-03-04T10:00:00').getTime())
)
.getOnce(
'express:/project/:projectId/messages',
[
{
id: 'msg_51',
content: 'message from second page',
user,
timestamp: new Date('2021-03-04T11:00:00').getTime(),
},
],
{ overwriteRoutes: false }
)
const { result, waitForNextUpdate } = renderChatContextHook({ user })
result.current.loadMoreMessages()
await waitForNextUpdate()
// Call a second time
result.current.loadMoreMessages()
await waitForNextUpdate()
// The second request is added to the list
// Since both messages from the same user, they are collapsed into the
// same "message"
expect(result.current.messages[0].contents).to.include(
'message from second page'
)
// The before query param for the second request matches the timestamp
// of the first message
const beforeParam = parseInt(getLastFetchMockQueryParam('before'), 10)
expect(beforeParam).to.equal(new Date('2021-03-04T10:00:00').getTime())
})
it("won't load more messages if there are no more messages", async function () {
// Mock a GET request for 49 messages. This is less the the full page size
// (50 messages), meaning that there are no further messages to be loaded
fetchMock.getOnce(
'express:/project/:projectId/messages',
createMessages(49, user)
)
const { result, waitForNextUpdate } = renderChatContextHook({ user })
result.current.loadMoreMessages()
await waitForNextUpdate()
expect(result.current.messages[0].contents).to.have.length(49)
result.current.loadMoreMessages()
expect(result.current.atEnd).to.be.true
expect(fetchMock.calls()).to.have.lengthOf(1)
})
it('handles socket messages while loading', async function () {
// Mock GET messages so that we can control when the promise is resolved
let resolveLoadingMessages
fetchMock.get(
'express:/project/:projectId/messages',
new Promise(resolve => {
resolveLoadingMessages = resolve
})
)
const socket = new EventEmitter()
const { result, waitForNextUpdate } = renderChatContextHook({
user,
socket,
})
// Start loading messages
result.current.loadMoreMessages()
// Mock message being received from the socket while the request is in
// flight
socket.emit('new-chat-message', {
id: 'socket_msg',
content: 'socket message',
timestamp: Date.now(),
user: {
id: 'another_fake_user',
first_name: 'another_fake_user_first_name',
email: 'another_fake@example.com',
},
})
// Resolve messages being loaded
resolveLoadingMessages([
{
id: 'fetched_msg',
content: 'loaded message',
user,
timestamp: Date.now(),
},
])
await waitForNextUpdate()
// Although the loaded message was resolved last, it appears first (since
// requested messages must have come first)
const messageContents = result.current.messages.map(
({ contents }) => contents[0]
)
expect(messageContents).to.deep.equal([
'loaded message',
'socket message',
])
})
it('provides an error on failures', async function () {
fetchMock.reset()
fetchMock.get('express:/project/:projectId/messages', 500)
const { result, waitForNextUpdate } = renderChatContextHook({ user })
result.current.loadMoreMessages()
await waitForNextUpdate()
expect(result.current.error).to.exist
expect(result.current.status).to.equal('error')
})
})
describe('sendMessage', function () {
beforeEach(function () {
// Mock GET messages to return no messages and POST new message to be
// successful
fetchMock
.get('express:/project/:projectId/messages', [])
.postOnce('express:/project/:projectId/messages', 200)
})
it('optimistically adds the message to the list', function () {
const { result } = renderChatContextHook({ user })
result.current.sendMessage('sent message')
expect(result.current.messages[0].contents).to.deep.equal([
'sent message',
])
})
it('POSTs the message to the backend', function () {
const { result } = renderChatContextHook({ user })
result.current.sendMessage('sent message')
const [, { body }] = fetchMock.lastCall(
'express:/project/:projectId/messages',
'POST'
)
expect(JSON.parse(body)).to.deep.equal({ content: 'sent message' })
})
it("doesn't send if the content is empty", function () {
const { result } = renderChatContextHook({ user })
result.current.sendMessage('')
expect(result.current.messages).to.be.empty
expect(
fetchMock.called('express:/project/:projectId/messages', {
method: 'post',
})
).to.be.false
})
it('provides an error on failure', async function () {
fetchMock.reset()
fetchMock
.get('express:/project/:projectId/messages', [])
.postOnce('express:/project/:projectId/messages', 500)
const { result, waitForNextUpdate } = renderChatContextHook({ user })
result.current.sendMessage('sent message')
await waitForNextUpdate()
expect(result.current.error).to.exist
expect(result.current.status).to.equal('error')
})
})
describe('unread messages', function () {
beforeEach(function () {
// Mock GET messages to return no messages
fetchMock.get('express:/project/:projectId/messages', [])
})
it('increments unreadMessageCount when a new message is received', function () {
const socket = new EventEmitter()
const { result } = renderChatContextHook({ user, socket })
// Receive a new message from the socket
socket.emit('new-chat-message', {
id: 'msg_1',
content: 'new message',
timestamp: Date.now(),
user,
})
expect(result.current.unreadMessageCount).to.equal(1)
})
it('resets unreadMessageCount when markMessagesAsRead is called', function () {
const socket = new EventEmitter()
const { result } = renderChatContextHook({ user, socket })
// Receive a new message from the socket, incrementing unreadMessageCount
// by 1
socket.emit('new-chat-message', {
id: 'msg_1',
content: 'new message',
timestamp: Date.now(),
user,
})
result.current.markMessagesAsRead()
expect(result.current.unreadMessageCount).to.equal(0)
})
})
})
function renderChatContextHook(props) {
return renderHook(() => useChatContext(), {
// Wrap with ChatContext.Provider (and the other editor context providers)
// eslint-disable-next-line react/display-name
wrapper: ({ children }) => (
<ChatProviders {...props}>{children}</ChatProviders>
),
})
}
function createMessages(number, user, timestamp = Date.now()) {
return Array.from({ length: number }, (_m, idx) => ({
id: `msg_${idx + 1}`,
content: `message ${idx + 1}`,
user,
timestamp,
}))
}
/*
* Get query param by key from the last fetchMock response
*/
function getLastFetchMockQueryParam(key) {
const { url } = fetchMock.lastResponse()
const { searchParams } = new URL(url, 'https://www.overleaf.com')
return searchParams.get(key)
}