How to check for file in download folder and if exist delete in cypress

Question

I have to download a excel file lets say "someData.xlsx" during test execution meanwhile before downloading also have to put a check over download folder if "someData.xlsx" exist in download folder delete it before downloading the newly updated file. could someone explain how to achieve this ?

I tried this but getting fs.readdirSync is not a function

fs.readdirSync('./downloads').forEach((file) => {
                fs.unlinkSync(`./downloads/${file}`);
              }); 

Answer 1

install cypress-delete-downloads-folder by npm i -D cypress-delete-downloads-folder

in plugins/index.js

const fs = require("fs");
const { removeDirectory } = require('cypress-delete-downloads-folder');


module.exports = (on, config) => {
//task to check if file exist
  on("task", {
     isFileExist( filePath ) {
      return new Promise((resolve, reject) => {
        try {
          let isExists = fs.existsSync(filePath)
          resolve(isExists);
        } catch (e) {
          reject(e);
        }
      });
    }
  });
//to remove directory
on('task', { removeDirectory });
}

in support/commands.js

require('cypress-delete-downloads-folder').addCustomCommand();

in your test spec file

const path = require('path');


describe('check for file in download folder and if exist delete', () => {
    it('delete download folder', () => {
        
        cy.task("isFileExist", { fileName: `.${path.sep}downloads${path.sep}fileName.xlsx`}).then(() => {
            cy.deleteDownloadsFolder()
        });