dubdiff/test/dubdiffPlaintext.js

/* eslint-env node, mocha */
/* global expect */
/* eslint no-console: 0 */
'use strict'

import chai from 'chai'

import {plaintextDiff, diffToString} from '../src/common/util/dubdiff'

let diff = (a, b) => diffToString(plaintextDiff(a, b))

const expect = chai.expect // eslint-disable-line no-unused-vars

describe('dubdiff', () => {
  beforeEach(() => {
  })

  it('diffs single words', () => {
    expect(diff(
      'This is a smlb sentence.',
      'This is a simple sentence.'
    )).to.equal('This is a [-smlb -]{+simple +}sentence.')
  })

  it('diffs consecutive words', () => {
    expect(diff(
      'This is a smlb sentnce with no errors.',
      'This is a simple sentence with no errors.'
    )).to.equal('This is a [-smlb sentnce -]{+simple sentence +}with no errors.')
  })

  it('diffs with word deletion', () => {
    expect(diff(
      'Gonna delete a word.',
      'Gonna delete word.'
    )).to.equal('Gonna delete [-a -]word.')
  })
  it('diffs with word insertion', () => {
    expect(diff(
      'Gonna add word.',
      'Gonna add a word.'
    )).to.equal('Gonna add {+a +}word.')
  })
  it('diffs accross newline without weird spaces', () => {
    expect(diff(
      'This is a flawed\ncomment',
      'This is a corrected\nitem'
    )).to.equal('This is a [-flawed-]{+corrected+}\n[-comment-]{+item+}')
  })
  it('doesn\'t add spaces after newline', () => {
    expect(diff(
      '\nhere',
      '\nhere'
    )).to.equal('\nhere')
  })
  it('doesn\'t add spaces before newline', () => {
    expect(diff(
      'there\n',
      'there\n'
    )).to.equal('there\n')
  })
  it('treats punctuation separately', () => {
    expect(diff(
      'Hello world.',
      'Hello, world.'
    )).to.equal('Hello{+, +}world.')
  })
})