overleaf/services/web/test/frontend/features/binary-file/components/binary-file-text.test.js

import React from 'react'
import { render, screen } from '@testing-library/react'
import fetchMock from 'fetch-mock'

import BinaryFileText from '../../../../../frontend/js/features/binary-file/components/binary-file-text.js'

describe('<BinaryFileText/>', function () {
  const file = {
    name: 'example.tex',
    linkedFileData: {
      v1_source_doc_id: 'v1-source-id',
      source_project_id: 'source-project-id',
      source_entity_path: '/source-entity-path.ext',
      provider: 'project_file',
    },
    created: new Date(2021, 1, 17, 3, 24).toISOString(),
  }

  beforeEach(function () {
    fetchMock.reset()
    window.project_id = '123abc'
  })

  afterEach(function () {
    delete window.project_id
  })

  it('renders a text view', async function () {
    fetchMock.head('express:/project/:project_id/file/:file_id', {
      status: 201,
      headers: { 'Content-Length': 10000 },
    })
    fetchMock.get(
      'express:/project/:project_id/file/:file_id',
      'Text file content'
    )

    render(<BinaryFileText file={file} onError={() => {}} onLoad={() => {}} />)

    await screen.findByText('Text file content', { exact: false })
  })
})