overleaf/services/web/test/frontend/features/chat/components/chat-pane.test.js

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import { expect } from 'chai'
import {
fireEvent,
screen,
waitForElementToBeRemoved,
} from '@testing-library/react'
import fetchMock from 'fetch-mock'
import ChatPane from '../../../../../frontend/js/features/chat/components/chat-pane'
import {
renderWithChatContext,
cleanUpContext,
} from '../../../helpers/render-with-context'
import { stubMathJax, tearDownMathJaxStubs } from './stubs'
describe('<ChatPane />', function () {
const user = {
id: 'fake_user',
first_name: 'fake_user_first_name',
email: 'fake@example.com',
}
const testMessages = [
{
id: 'msg_1',
content: 'a message',
user,
timestamp: new Date().getTime(),
},
{
id: 'msg_2',
content: 'another message',
user,
timestamp: new Date().getTime(),
},
]
beforeEach(function () {
fetchMock.reset()
cleanUpContext()
stubMathJax()
})
afterEach(function () {
tearDownMathJaxStubs()
})
it('renders multiple messages', async function () {
fetchMock.get(/messages/, testMessages)
renderWithChatContext(<ChatPane />, { user })
await screen.findByText('a message')
await screen.findByText('another message')
})
it('provides error message with reload button on FetchError', async function () {
fetchMock.get(/messages/, 500)
renderWithChatContext(<ChatPane />, { user })
// should have hit a FetchError and will prompt user to reconnect
await screen.findByText('Try again')
// bring chat back up
fetchMock.reset()
fetchMock.get(/messages/, [])
const reconnectButton = screen.getByRole('button', {
name: 'Try again',
})
expect(reconnectButton).to.exist
// should now reconnect with placeholder message
fireEvent.click(reconnectButton)
await screen.findByText('Send your first message to your collaborators')
})
it('a loading spinner is rendered while the messages are loading, then disappears', async function () {
fetchMock.get(/messages/, [])
renderWithChatContext(<ChatPane />, { user })
await waitForElementToBeRemoved(() => screen.getByText('Loading…'))
})
describe('"send your first message" placeholder', function () {
it('is rendered when there are no messages ', async function () {
fetchMock.get(/messages/, [])
renderWithChatContext(<ChatPane />, { user })
await screen.findByText('Send your first message to your collaborators')
})
it('is not rendered when messages are displayed', function () {
fetchMock.get(/messages/, testMessages)
renderWithChatContext(<ChatPane />, { user })
expect(
screen.queryByText('Send your first message to your collaborators')
).to.not.exist
})
})
})