cypress-form-data-with-file-upload
How to test HTTP form submission with file input using Cypress - a hack
Last updated 3 years ago by bahmutov .
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cypress-form-data-with-file-upload

NPM

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How to test HTTP form submission with file input using Cypress - a hack

Testing multipart file upload in Cypress

If the app uses "naked" HTML form submission with file input like server/index.html, the Cypress test spec.js can either replace the submission on the fly with XHR.

Install

npm install --save-dev cypress-form-data-with-file-upload

Use

From your spec file (see spec.js in this repo)

const attachFiles = require('cypress-form-data-with-file-upload')
beforeEach(() => {
  cy.visit('localhost:3000')
})
it('uploads', () => {
  // files to upload for each input[type="file"] by name
  // we are going to construct a single text file in this test
  // for <input type="file" name="fileToUpload" />
  const files = {
    fileToUpload: new File(['foo bar'], 'test-file.txt', {
      type: 'text/plain'
    })
  }
  // get the form element and attach files to upload
  cy.get('form').then(attachFiles(files))

  // submit the form
  cy.get('input[type="submit"]').click()

  // check returned page
  // or check url
  // or spy on the XHR form submission
})

Tip: you can spy on the XHR call, see test in spec.js

Upload test

Development

  • npm install
  • start server index.js with npm start
  • open Cypress npm run cy:open

This code could be made into tiny little helper to answer https://github.com/cypress-io/cypress/issues/170

Small print

Author: Gleb Bahmutov <gleb.bahmutov@gmail.com> © 2018

License: MIT - do anything with the code, but don't blame me if it does not work.

Support: if you find any problems with this module, email / tweet / open issue on Github

MIT License

Copyright (c) 2018 Gleb Bahmutov <gleb.bahmutov@gmail.com>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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