Cypress read contenu PDf file

I want to retrieve the content of a pdf in my cypress test

index.js:

const path = require('path')
const pdf = require('pdf-parse')
const repoRoot = path.join(__dirname, '..', '..')

const parsePdf = async (pdfName) => {
  const pdfPathname = path.join(repoRoot, pdfName)
  let dataBuffer = fs.readFileSync(pdfPathname);
  return await (pdf(dataBuffer))  // use async/await since pdf returns a promise
}

module.exports = (on, config) => {
    on('task', {
        getPdfContent (pdfName) {
            return (parsePdf(pdfName))
        }
    })
     return config
}

steps.js:

  cy.task('getPdfContent', 'cypress/fixtures/justificatifs/attestation.pdf').then(content => {
                    cy.log(content)
      })

why is it not working?

Cdt