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Continuous Integration

We use continuous integration (CI) to test and check our code on every git push.

Services

  • GitHub Actions
    • runs unit tests (pytest)
    • runs integration tests (Cypress)
    • reformats Python and JavaScript code on the default branch
    • triggers deployment via webhook at deploy.altlab.dev
  • codecov: measures and tracks code coverage
  • Cypress: stores test recordings

Cypress

On GitHub Actions, the integration test run using this rule:

npm run test:ci

Which, in turn, does the following:

  • USE_TEST_DB=true pipenv run dev & — Starts the Django server in the background
  • wait-on tcp:127.0.0.1:8000 — waits for the Django server to respond to HTTP requests
  • $(npm bin)/cypress run $CYPRESS_OPTS — runs the Cypress integration tests

$CYPRESS_OPTS is intended to be either empty or --record. If set to --record --key SECRET_KEY, it will upload recordings to the Cypress Dashboard. Note that if there is no more room for recordings on our Cypress plan, the build will fail. We're on Cypress's open-source plan, which should give us some extra space to deal with!