hunk.code_window:   expect(warning.endColumn).toBe(4)
   })
   it('gets range from word', () => {
     let root = parse('a b{}')
     let warning = new Warning('text', { node: root.first, word: 'b' })
     expect(warning.line).toBe(1)
     expect(warning.column).toBe(3)
  
hunk.labels: keep keep add keep keep keep keep keep
hunk.after_edit: it('gets range from node without end', () => {
     let root = parse('a{}')
     root.first!.source!.end = undefined
     let warning = new Warning('text', { node: root.first })
     expect(warning.line).toBe(1)
     expect(warning.column).toBe(1)
     expect(warning.endLine).toBe(1)
     expect(warning.endColumn).toBe(2)
   })
  
hunk.file_path: test/warning.test.ts
hunk.type: add
file: 'use strict'
  
  let CssSyntaxError = require('./css-syntax-error')
  let Declaration = require('./declaration')
  let LazyResult = require('./lazy-result')
  let Container = require('./container')
  let Processor = require('./processor')
  let stringify = require('./stringify')
  let fromJSON = require('./fromJSON')
  let Document = require('./document')
  let Warning = require('./warning')
  let Comment = require('./comment')
  let AtRule = require('./at-rule')
  let Result = require('./result.js')
  let Input = require('./input')
  let parse = require('./parse')
  let list = require('./list')
  let Rule = require('./rule')
  let Root = require('./root')
  let Node = require('./node')
  
  function postcss(...plugins) {
    if (plugins.length === 1 && Array.isArray(plugins[0])) {
      plugins = plugins[0]
    }
    return new Processor(plugins)
  }
  
  postcss.plugin = function plugin(name, initializer) {
    // eslint-disable-next-line no-console
    if (console && console.warn) {
      // eslint-disable-next-line no-console
      console.warn(
        name +
          ': postcss.plugin was deprecated. Migration guide:\n' +
          'https://evilmartians.com/chronicles/postcss-8-plugin-migration'
      )
      if (process.env.LANG && process.env.LANG.startsWith('cn')) {
        // istanbul ignore next
        // eslint-disable-next-line no-console
        console.warn(
          name +
            ': 里面 postcss.plugin 被弃用. 迁移指南:\n' +
            'https://www.w3ctech.com/topic/2226'
        )
      }
    }
    function creator(...args) {
      let transformer = initializer(...args)
      transformer.postcssPlugin = name
      transformer.postcssVersion = new Processor().version
      return transformer
    }
  
    let cache
    Object.defineProperty(creator, 'postcss', {
      get() {
        if (!cache) cache = creator()
        return cache
      }
    })
  
    creator.process = function (css, processOpts, pluginOpts) {
      return postcss([creator(pluginOpts)]).process(css, processOpts)
    }
  
    return creator
  }
  
  postcss.stringify = stringify
  postcss.parse = parse
  postcss.fromJSON = fromJSON
  postcss.list = list
  
  postcss.comment = defaults => new Comment(defaults)
  postcss.atRule = defaults => new AtRule(defaults)
  postcss.decl = defaults => new Declaration(defaults)
  postcss.rule = defaults => new Rule(defaults)
  postcss.root = defaults => new Root(defaults)
  postcss.document = defaults => new Document(defaults)
  
  postcss.CssSyntaxError = CssSyntaxError
  postcss.Declaration = Declaration
  postcss.Container = Container
  postcss.Processor = Processor
  postcss.Document = Document
  postcss.Comment = Comment
  postcss.Warning = Warning
  postcss.AtRule = AtRule
  postcss.Result = Result
  postcss.Input = Input
  postcss.Rule = Rule
  postcss.Root = Root
  postcss.Node = Node
  
  LazyResult.registerPostcss(postcss)
  
  module.exports = postcss
  postcss.default = postcss
  