How to check for file in download folder and if exist delete in cypress - 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()
});

Answer 2

You can create a script in "scripts" section of "Package.json" like below:
"clear": "del /f cypress\\results\\*.xlsx"
which will forcefully delete the XLSX files of "cypress\results\" folder. Now, execute this before running your tests.
Refer image as I've used for deleting the JSON files in the respective folder.