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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/contributing/development/testing-with-cypress

Running the E2E tests in development environment

In dev environment, to execute the E2E tests, you will need to open 3 different terminals in 2 different projects.

1. API: Server

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

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

First:

Then, simply start it for E2E with:

  • npm run start:e2e

Behind the scenes it will do the following (so you don't have to do it):

  • set environment variables: TZ=UTC NODE_ENV=e2e E2E_TEST=1
  • reset a dedicated database (opencollective_e2e): npm run db:restore:e2e
  • migrate the database: npm run db:migrate
  • build the API server: npm run build
  • start the API server: npm run start

2. Frontend: Server

If it's not already setup, look at the "Install" instructions in the README.

Make sure the Frontend is talking to the local API:

In your .env, paste the following content:

API_URL=http://localhost:3060
API_KEY=dvl-1510egmf4a23d80342403fb599qd

You can simply start a local server by running npm run dev. This is useful to quickly iterate when developing, but if you're looking for stable and reproducible results we recommend to run a build of the Frontend. It will be faster and more reliable. To do so:

  • npm run build:e2e

Start from the build:

  • npm run start:e2e

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

  • TZ=UTC npm run dev

3. 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

Troubleshooting

  • To launch with Chrome, use npm run cypress:open -- --browser chrome (double check Chrome is selected in the UI before running)
  • On Mac OS, to force Chrome to use the English language: defaults write com.google.Chrome AppleLanguages '(en, en-US)'