.gitlab-ci.yml

# first, install Cypress, then run all tests (in parallel)
stages:
  - build
  - test

# to cache both npm modules and Cypress binary we use environment variables
# to point at the folders we can list as paths in "cache" job settings
variables:
  npm_config_cache: "$CI_PROJECT_DIR/.npm"
  CYPRESS_CACHE_FOLDER: "$CI_PROJECT_DIR/cache/Cypress"

# cache using branch name
# https://gitlab.com/help/ci/caching/index.md
cache:
  key: ${CI_COMMIT_REF_SLUG}
  paths:
    - .npm
    - cache/Cypress
    - node_modules

# this job installs NPM dependencies and Cypress
install:
  image: cypress/base:10
  stage: build

  script:
    - npm ci
    - $(npm bin)/print-env CI
    - npm run cy:verify

# all jobs that actually run tests can use the same definition
.job_template: &job
  image: cypress/base:10
  stage: test
  script:
    # print CI environment variables for reference
    - $(npm bin)/print-env CI
    # start the server in the background
    - npm run start:ci &
    # run Cypress test in load balancing mode, pass id to tie jobs together
    - npm run e2e:record -- --parallel --ci-build-id $CI_PIPELINE_ID --group electrons

# actual job definitions
# all steps are the same, they come from the template above
electrons-1:
  <<: *job
electrons-2:
  <<: *job
electrons-3:
  <<: *job
electrons-4:
  <<: *job
electrons-5:
  <<: *job