(bug) The 'task' event has not been registered in the plugins file. You must register it before using cy.task()

[CyrilKrylatov]

Describe the bug Hi @meinaart,

I have the following error when I'm trying to use cypress-plugin-snapshots:

cy.task('cypress-plugin-snapshot:getFile') failed with the following error:

The 'task' event has not been registered in the plugins file. You must register it before using cy.task()

Fix this in your plugins file here:
false

https://on.cypress.io/api/task

Because this error occurred during a before all hook we are skipping all of the remaining tests.

To Reproduce Steps to reproduce the behavior:

1. Install cypress-plugin-snapshots
2. Add to one of my test (show.spec.js):

   it('Compare screenshots', () => {
   cy.get(`[data-cy="screenshot-offers"]`)
     .toMatchImageSnapshot()
   })

Expected behavior I'm expecting to not have this error I guess

Screenshots

Desktop (please complete the following information):

• OS: macOS Mojave 10.14.6 (18G95)
• Cypress Version 4.7.0

Additional context Thank you for your support!

[adesko]

@CyrilKrylatov Don't know if you've figured this out already, but i had this issue and looks like the reason was that i had 2 module.exports statements in the plugins/index.js file. So i moved everything to one module.exports statement. This was before:

const { initPlugin } = require('cypress-plugin-snapshots/plugin');

module.exports = (on, config) => {
  initPlugin(on, config);
  return config;
};

module.exports = (on, config) => {
    on('before:browser:launch', (browser = {}, launchOptions) => {
      if (browser.family === 'chromium' && browser.name !== 'electron') {
        launchOptions.args.push('--disable-dev-shm-usage');
      };
      return launchOptions
    });
  };

And this is after:

const { initPlugin } = require('cypress-plugin-snapshots/plugin');

module.exports = (on, config) => {
    on('before:browser:launch', (browser = {}, launchOptions) => {
      if (browser.family === 'chromium' && browser.name !== 'electron') {
        launchOptions.args.push('--disable-dev-shm-usage');
      };
      return launchOptions
    });

    initPlugin(on, config);
    return config;
  };

After doing that, the issue disappeared.

[mshamshaddin1]

@adesko - Thank you so much, that also worked for me!