CODEWITHSUNDEEP
javascriptcypress
Mag
Mag

Reputation: 229

How to verify if a file is downloaded with a particular extension instead of whole name?

I created test that:

  1. erase existing download directory (cypress/download)
  2. Downloading a file.pdf/csv/txt/and so on...
  3. Makes an assertion and in order to do that you have to provide expected filename for instance 'correctFile.pdf' and cypress will match this expected name with filename that has been downloaded in 'cypress/download'.
  4. erase existing download directory (cypress/download)

cypress/download TEST.pdf

TEST: `

it.only("should downloads file", () => {
    cy.task('deleteDirectory', downloadsFolder); // deleting download directory
    cy.get("downloadButton").click(); // downloading 'TEST.pdf' file
    cy.task('isExistDownloadedFile', 'TEST.pdf').should('equal', true); // assertion
    cy.task('deleteDirectory', downloadsFolder); // deleting download directory
  })

`

plugins/index.js `


**--snip--**

const path = require('path');
const fs = require('fs');
const downloadDirectory = path.join(__dirname, '..', 'downloads');
    
const findDownloadedFile = (filename) => {
  **const FileName = `${downloadDirectory}/${filename}`;**
  const contents = fs.existsSync(FileName);
  return contents;
};
    
const hasFile = (filename, ms) => {
  const delay = 10;
  return new Promise((resolve, reject) => {
    if (ms < 0) {
      return reject(
        new Error(`Could not find any file ${downloadDirectory}/${filename}`)
      );
    }
    const found = findDownloadedFile(filename);
    if (found) {
      return resolve(true);
    }
    setTimeout(() => {
      hasFile(filename, ms - delay).then(resolve, reject);
    }, delay);
  });
};

**--snip--**

// find downloaded file and match the name of that file with the expected filename
  on('task', {
    isExistDownloadedFile(filename, ms = 4000) {
      return hasFile(filename, ms);
    },
  });
  return config;

`

My question: Now I can assert only entire file name e.g. TEST.pdf (downloaded) equal to TEST.pdf (expected) RESULT: PASSED but how can I make that my program will also accept some characters, like only extension for instance: TEST.pdf (downloaded) contains .pdf (expected) RESULT: PASSED

Upvotes: 2

Views: 1146

Answers (2)

Fody
Fody

Reputation: 31954

Install glob and use it in place of fs.existsSync()

plugins/index.js

...
const glob = require("glob");

const findDownloadedFile = (filename) => {
  const matches = glob.sync(fileName);
  return (matches.length > 0);
}

test

// partial name
cy.task('isExistDownloadedFile', '*.pdf').should('equal', true)

// still works with full name
cy.task('isExistDownloadedFile', 'TEST.pdf').should('equal', true)

Upvotes: 3

agoff
agoff

Reputation: 7135

You could implement something like this answer to filter the results of the entire list of files in the directory.

const findDownloadedFile = (filename) => {
  const files = fs.readDirSync(downloadDirectory).filter((x) => x.includes(filename));
  return files.length
};

Upvotes: 1

Related Questions