Cypress is returning an empty array when trying to log sheetnames of an excel file - excel

Question

I am currently trying to get the sheetnames of an excel file but Cypress is returning an empty array. Is there something I missed? I'll be using it to verify data on later steps.
I'm using Cypress 9.6.0 with Cucumber. Below are my scripts and screenshots:
index.js for task
module.exports = (on, config) => {
on('file:preprocessor', cucumber());
on('task', {
checkExcelSheetContents(args){
if (fs.existsSync(args.filePath)) {
const workbook = xlsx.readFile(args.filePath);
return xlsx.utils.sheet_to_json(workbook.SheetNames)
} else {
throw new Error ("File not found")
}
}
})
return Object.assign({}, config, {
fixturesFolder: 'cypress/fixtures',
integrationFolder: 'cypress/integration',
screenshotsFolder: 'cypress/screenshots',
videosFolder: 'cypress/videos',
supportFile: 'cypress/support/index.js'
});
}
.js file
And ('try', () => {
var excelFilePath = "../CreateAutomatedTests/cypress/downloads/courses20220714_09_51_27.xlsx"
cy.wrap(excelFilePath).as('filePath')
cy.get('#filePath').then((filePath) => {
cy.task('checkExcelSheetContents', { filePath }).then((contents) => {
cy.log(contents)
})
})
})
Please see these screenshots as well

Answer 1

I've always used the buffer version of xlsx.read().
From xlsx package
For Node ESM, the readFile helper is not enabled. Instead, fs.readFileSync should be used to read the file data as a Buffer for use with XLSX.read:
import { readFileSync } from "fs";
import { read } from "xlsx/xlsx.mjs";
const buf = readFileSync("test.xlsx");
/* buf is a Buffer */
const workbook = read(buf);
Your task:
on('task', {
checkExcelSheetContents(args){
if (fs.existsSync(args.filePath)) {
const buf = fs.readFileSync(file);
const workbook = xlsx.read(buf, { type: 'buffer' });
return workbook.SheetNames
} else {
throw new Error ("File not found")
}
}
})