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E2E (end-to-end) tests

We use Cypress for E2E (end-to-end) tests.

Writing E2E tests

See the following guide in our documentation: https://docs.opencollective.com/help/developers/testing-with-cypress

Running the E2E tests in development environment

In dev environment, to execute the E2E tests, you will need to open 4 different terminals in 2 different projects.

1. API: Server

To make sure tests are properly reproduceable, you will need to setup the Open Collective API locally.

We recommend to run a build and not the development environment.

We also recommend to restore the development dump of the database before you start the tests.

  • npm run db:restore && npm run db:migrate

Then start the API:

  • TZ=UTC NODE_ENV=e2e E2E_TEST=1 MAILDEV=1 npm run start

2. API: Maildev

Some tests are relying on Maildev to check that emails are properly sent.

From the the API repository, start Maildev with:

  • npm run maildev

3. Frontend: Server

We recommend to run a production build of the Frontend. It will be faster and more reliable.

When investigating a specific test, feel free to switch to the development environment:

  • TZ=UTC npm run dev

4. Frontend: Cypress

You can run all the Cypress tests in CLI mode with the following command:

  • npm run test:e2e

Cypress tests are split in 4 different groups. You can run these groups individually in CLI mode with:

  • npm run test:e2e:0
  • npm run test:e2e:1
  • npm run test:e2e:2
  • npm run test:e2e:3

To inspect tests, you can open the Cypress application with the following command:

  • npm run cypress:open