old_contents: const stylelint = require('stylelint')
  const path = require('path')
  
  const code = `import styled from 'styled-components';
  const StyledTable = styled(StyledTableBase)\`
  color: red;
  \``
  const processor = path.join(__dirname, '../lib/index.js')
  const rules = {
    indentation: 2
  }
  
  describe('no files', () => {
    let codeFilename
    let data
  
    // NOTE beforeEach() runs _after_ the beforeAll() hooks of the describe() blocks
    beforeEach(done => {
      stylelint
        .lint({
          code,
          codeFilename,
          syntax: 'scss',
          config: {
            processors: [processor],
            rules
          }
        })
        .then(result => {
          data = result
          done()
        })
        .catch(err => {
          // eslint-disable-next-line
          console.log(err)
          data = err
          done()
        })
    })
  
    describe('no codeFilename', () => {
      beforeAll(() => {})
  
      it('should have one result', () => {
        expect(data.results.length).toEqual(1)
      })
  
      it('should use the right file', () => {
        expect(data.results[0].source).toEqual('<input css 2>')
      })
  
      it('should have errored', () => {
        expect(data.errored).toEqual(true)
      })
  
      it('should have one warnings', () => {
        expect(data.results[0].warnings.length).toEqual(1)
      })
  
      it('should have the right line number', () => {
        expect(data.results[0].warnings[0].line).toEqual(3)
      })
    })
  
    describe('has codeFilename', () => {
      beforeAll(() => {
        codeFilename = 'somefile.js'
      })
  
      it('should have one result', () => {
        expect(data.results.length).toEqual(1)
      })
  
      it('should use the right file', () => {
        expect(data.results[0].source).toEqual(path.resolve(process.cwd(), codeFilename))
      })
  
      it('should have errored', () => {
        expect(data.errored).toEqual(true)
      })
  
      it('should have one warnings', () => {
        expect(data.results[0].warnings.length).toEqual(1)
      })
  
      it('should have the right line number', () => {
        expect(data.results[0].warnings[0].line).toEqual(3)
      })
    })
  })
  
new_contents: const stylelint = require('stylelint')
  const path = require('path')
  
  const code = `import styled from 'styled-components';
  const StyledTable = styled(StyledTableBase)\`
  color: red;
  \``
  const processor = path.join(__dirname, '../lib/index.js')
  const rules = {
    indentation: 2
  }
  
  describe('no files', () => {
    let codeFilename
    let data
  
    // NOTE beforeEach() runs _after_ the beforeAll() hooks of the describe() blocks
    beforeEach(done => {
      stylelint
        .lint({
          code,
          codeFilename,
          syntax: 'scss',
          config: {
            processors: [processor],
            rules
          }
        })
        .then(result => {
          data = result
          done()
        })
        .catch(err => {
          // eslint-disable-next-line
          console.log(err)
          data = err
          done()
        })
    })
  
    describe('no codeFilename', () => {
      beforeAll(() => {
        codeFilename = undefined
      })
  
      it('should have one result', () => {
        expect(data.results.length).toEqual(1)
      })
  
      it('should use the right file', () => {
        // Every new linting that occurs in beforeEach() will increase the id
        expect(data.results[0].source).toEqual('<input css 2>')
      })
  
      it('should have errored', () => {
        expect(data.errored).toEqual(true)
      })
  
      it('should have one warning', () => {
        expect(data.results[0].warnings.length).toEqual(1)
      })
  
      it('should have the right line number', () => {
        expect(data.results[0].warnings[0].line).toEqual(3)
      })
    })
  
    describe('has codeFilename', () => {
      beforeAll(() => {
        codeFilename = 'somefile.js'
      })
  
      it('should have one result', () => {
        expect(data.results.length).toEqual(1)
      })
  
      it('should use the right file', () => {
        expect(data.results[0].source).toEqual(path.resolve(process.cwd(), codeFilename))
      })
  
      it('should have errored', () => {
        expect(data.errored).toEqual(true)
      })
  
      it('should have one warning', () => {
        expect(data.results[0].warnings.length).toEqual(1)
      })
  
      it('should have the right line number', () => {
        expect(data.results[0].warnings[0].line).toEqual(3)
      })
    })
  })
  
subject: Fix typos and add comments