config.yml

jobs:
  test:
    <executor removed for brevity>
    # set the number of containers to split the tests across
    parallelism: 2
    steps:
    <checkout steps removed for brevity>
        # create directory to store test results
        - run: mkdir ~/junit
        
        - run:
            name: Test application 
            command: |
                TEST=$(circleci tests glob **/{*test.js,!node_modules} | circleci tests split --split-by=timings)
                yarn test $TEST
                
        # copy test results into directory created above  
        - run:
            command: cp junit.xml ~/junit/
            when: always
            
        # store test results !!need this to have timing data available!!
        - store_test_results:
              path: ~/junit
              
        # store test results as artifact as well
        - store_artifacts:
              path: ~/junit