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Overview

General information

OpenSearch Dashboards uses Jest for unit and integration tests, Selenium for functional tests, and Cypress for backwards compatibility tests.

In general, we recommend four tiers of tests:

  • Unit tests: Unit tests: small and modular tests that utilize mocks for external dependencies.
  • Integration tests: higher-level tests that verify interactions between systems (eg. HTTP APIs, OpenSearch API calls, calling other plugin).
  • End-to-end tests (e2e): functional tests that verify behavior in a web browser.
  • Backwards Compatibility tests: cypress tests that verify any changes are backwards compatible with previous versions.

Requirements

  • Install the latest NodeJS, NPM and Yarn
    • nvm install v14.20.1
    • npm install -g yarn

Running tests

The following is a cheatsheet of options for running the tests for OpenSearch Dashboards.

Unit tests

To run all the unit tests: yarn test:jest To run specific unit tests, pass the path to the test: yarn test:jest [test path]

Integration tests

To run all the integration tests: yarn test:jest_integration To run specific integration tests, pass the path to the test: yarn test:jest_integration [test path]

Functional tests

Functional testing in OpenSearch Dashboards is migrating to the opensearch-dashboards-functional-test repository. All new functional tests should be written there. When modifying a file that affects an existing functional test, the old test should be migrated to the new repository. The rest of this section outlines how to run the existing functional tests in the repository.

To run all functional tests: yarn test:ftr To run specific functional tests, you can run by CI group: node scripts/functional_tests.js --include ciGroup1

To debug functional tests: Say that you would want to debug a test in CI group 1, you can run the following command in your environment: node --inspect-brk --inspect scripts/functional_tests.js --config test/functional/config.js --include ciGroup1 --debug

This will print off an address, to which you could open your chrome browser on your instance and navigate to chrome://inspect/#devices and inspect the functional test runner scripts/functional_tests.js.

Backwards Compatibility tests

To run all the backwards compatibility tests on OpenSearch Dashboards without security:

yarn test:bwc -o [test path to opensearch.tar.gz] -d [test path to opensearch-dashboards.tar.gz]

To run all the backwards compatibility tests on OpenSearch Dashboards with security, pass the security parameter to the test:

yarn test:bwc -o [test path to opensearch.tar.gz] -d [test path to opensearch-dashboards.tar.gz] -s true

To run specific versions' backwards compatibility tests, pass the versions to the test:

yarn test:bwc -o [test path to opensearch.tar.gz] -d [test path to opensearch-dashboards.tar.gz] -v "[test versions]"

To generate test data that will be utilized for backwards compatibility tests:

yarn test:bwc -o [test path to opensearch.tar.gz] -d [test path to opensearch-dashboards.tar.gz] -g true

This will create an archive of the data based on the OpenSearch Dashboards version you have provided. For example, if a tarball of 2.0.0 was passed then an osd-2.0.0.zip will be created. This command is intended to be executed when needed per a version. For example, when end-users cannot migrate directly from vPrevious to vNext. If osd-vCurrent.zip does not exist, then this command be ran and the output sourced controlled for future use.

Additional checks

Make sure you run lint checker before submitting a pull request. To run lint checker: node scripts/precommit_hook.js --fix

Please ensure that you don't introduce any broken links accidently. For any intentional broken link (e.g. dummy url in unit test), you can add it to lycheeexclude allow list specifically.

Writing Tests

Conventions and best practices for writing tests can be found in /src/core/TESTING.md

Continuous Integration

Automated testing is provided with Jenkins for Continuous Integration. Jenkins enables developers to build, deploy, and automate projects and provides us to run groups of tests quickly. CI groups are ran from the Jenkinsfile.

Environment misc

Selenium tests are run in headless mode on CI. Locally the same tests will be executed in a real browser. You can activate headless mode by setting the environment variable: export TEST_BROWSER_HEADLESS=1

Since local Selenium tests are run in a real browser, the dev environment should have a desktop environment and Google Chrome or Chromium installed to run the tests.

By default the version of OpenSearch Dashboards will pull the snapshot of the same version of OpenSearch if available while running a few integration tests and for running functional tests. However, if the version of OpenSearch Dashboards is not available, you can build OpenSearch locally and point the functional test runner to the executable with: export TEST_OPENSEARCH_FROM=[local directory of OpenSearch executable]

Selinium tests require a chromedriver and a corresponding version of chrome to run properly. Depending on the version of chromedriver used, you may need to use a version of Google Chrome that is not the latest version. You can do this by running:

# Enter the version of chrome that you want to install
CHROME_VERSION=100.0.4896.127-1

# Download Chrome to a temp directory
curl -sSL "https://dl.google.com/linux/linux_signing_key.pub" | sudo apt-key add -  && wget -O /tmp/chrome.deb "https://dl.google.com/linux/chrome/deb/pool/main/g/google-chrome-stable/google-chrome-stable_${CHROME_VERSION}_amd64.deb"

# Install/Downgrade Chrome
sudo apt-get install -y --allow-downgrades /tmp/chrome.deb

Misc

Although Jest is the standard for this project, there are a few Mocha tests that still exist. You can run these tests by running: yarn test:mocha

However, these tests will eventually be migrated. Please avoid writing new Mocha tests. For further questions or to check the status please see this issue.