Overleaf/libraries/overleaf-editor-core/test/string_file_data.test.js

// @ts-check
'use strict'

const { expect } = require('chai')
const _ = require('lodash')

const ot = require('..')
const StringFileData = require('../lib/file_data/string_file_data')
const TextOperation = ot.TextOperation

describe('StringFileData', function () {
  it('throws when it contains non BMP chars', function () {
    const content = '𝌆𝌆𝌆'
    const fileData = new StringFileData(content)
    const operation = new TextOperation()
    operation.insert('aa')
    expect(() => {
      fileData.edit(operation)
    }).to.throw(TextOperation.ApplyError, /string contains non BMP characters/)
  })

  it('validates string length when edited', function () {
    const longString = _.repeat('a', TextOperation.MAX_STRING_LENGTH)
    const fileData = new StringFileData(longString)
    expect(fileData.getByteLength()).to.equal(longString.length)
    expect(fileData.getStringLength()).to.equal(longString.length)

    expect(() => {
      fileData.edit(new TextOperation().retain(longString.length).insert('x'))
    }).to.throw(TextOperation.TooLongError)
    expect(fileData.getByteLength()).to.equal(longString.length)
    expect(fileData.getStringLength()).to.equal(longString.length)

    fileData.edit(new TextOperation().retain(longString.length - 1).remove(1))
    expect(fileData.getByteLength()).to.equal(longString.length - 1)
    expect(fileData.getStringLength()).to.equal(longString.length - 1)
  })

  it('getComments() should return an empty array', function () {
    const fileData = new StringFileData('test')
    expect(fileData.getComments()).to.eql([])
  })

  it('creates StringFileData with comments', function () {
    const fileData = new StringFileData('test', [
      {
        id: 'comm1',
        ranges: [
          {
            pos: 5,
            length: 10,
          },
        ],
      },
      {
        id: 'comm2',
        ranges: [
          {
            pos: 20,
            length: 5,
          },
        ],
      },
    ])

    expect(fileData.getComments()).to.eql([
      { id: 'comm1', ranges: [{ pos: 5, length: 10 }], resolved: false },
      { id: 'comm2', ranges: [{ pos: 20, length: 5 }], resolved: false },
    ])
  })

  it('fromRaw() should create StringFileData with comments', function () {
    const fileData = StringFileData.fromRaw({
      content: 'test',
      comments: [
        {
          id: 'comm1',
          ranges: [
            {
              pos: 5,
              length: 10,
            },
          ],
          resolved: false,
        },
        {
          id: 'comm2',
          ranges: [
            {
              pos: 20,
              length: 5,
            },
          ],
          resolved: true,
        },
      ],
    })

    expect(fileData.getComments()).to.eql([
      { id: 'comm1', ranges: [{ pos: 5, length: 10 }], resolved: false },
      { id: 'comm2', ranges: [{ pos: 20, length: 5 }], resolved: true },
    ])
  })
})