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Performance/Load Tests

CHEFS uses k6 for performance/load tests.

The tests require an IDIR user's token. Each CHEFS environment should have a configured IDIR user for the functional tests. Please get in touch with the test lead for the account information.

Configuration

k6 will require a lot of environment variables. When running the dev container, we have added dotenv-cli, allowing us to pass in an environment file instead of each variable.

IMPORTANT CHEFS API is rate-limited. Whatever instance/environment you are performance/load testing, you will need to raise the "server.rateLimit.public.limitFrontend" value.

Variables

Review sample-env to see a local configuration example.

var notes
OIDC_TOKEN_URL token url for OIDC provider
OIDC_CLIENT_ID the CHEFS SSO client ID for that provider
BASE_URL CHEFS instance to load test (need to include the base path ex. /app or /pr-123)
FORM_NAME one of the fixtures
SCENARIOS which scenarios to execute
RPS Requests Per Second - do not use more than 50 without consulting Platform services
TEST_RUN_USERS number of users for test_run stage
MIN_USERS min. virtual users for load tests
MAX_USERS max. virtual users for load tests
AVERAGE_USERS avg. virtual users for load tests
STRESS_LOAD_USERS avg. virtual users for load_with_spike and stress stages
STAGE which stage to run
INITIAL_TOKEN the IDIR test user access_token
INITIAL_REFRESH_TOKEN the IDIR test user refresh_token

Token

For the given execution environment, you will need to fetch a current token.

  • Open a browser with developer tools to see the Network calls and their responses.
  • Get the credentials for that CHEFS instance from the test lead, go to BASE_URL and sign in.
  • Look for the token request and copy the access_token attribute (set INITIAL_TOKEN) and the refresh_token attribute (set the INITIAL_REFRESH_TOKEN ).
cd tests/performance
cp .sample-env .env
< set INITIAL_TOKEN and INITIAL_REFRESH_TOKEN values >

Execution

Let's assume we are in the devcontainer and running CHEFS using the local defaults, and we've set the token configurations.

Example:

cd tests/performance
dotenv -e .env k6 run backend.js

Scenarios

createForm - will create a form using the FORM_NAME environment variable.

createAndPublishForm - will create a form using the FORM_NAME environment variable and publish it.

fetchAndSubmitForm - requires that the token user has an existing, published version of FORM_NAME. This will create a matching submission for that form and post it. This test is best used in conjunction with createAndPublishForm - by default it will start with a slight delay which allows a form to be created and published on an empty CHEFS instance.