The tests directory contains integration tests that require a pre-seeded database.
Each tests/ contains a seed.txt file at tests//seed.txt, which is used by the docker seeddb container to setup the test database.
The tests can be run using tests//run.sh.
The tests/search/scripts directory contains test scripts *.txt that are run using tests/search/run.sh.
These scripts follow the format:
Test name A search query A Expected result A1 Expected result A2 Test name B search query B Expected result B1 Expected result B2 ...
Each test set is separated by a newline. Comments (lines that being with a #), are ignored.
The imported by counts for a dataset can also be updated in search/importedby.txt. The file has the format:
<package-path>, <imported-by-count>
It is expected that the modules for these packages are in tests/search/seed.txt.
Th e2e/ directory contains end-to-end tests for pages on pkg.go.dev, which can be run using ./tests/e2e/run.sh.
In order to run the tests, run this command from the root of the repository:
./tests/e2e/run.sh
To run a set of tests with a custom experiment set active create a directory with a config.yaml file and a seed.txt file if a custom set of seed modules is desired. Then run ./tests/e2e/run.sh <directory>.
./tests/e2e/run.sh sets up a series of docker containers that run a postgres database, frontend, and headless chrome, and runs the e2e tests using headless chrome.
Alternatively, you can run the tests against a website that is already running.
First run headless chrome:
docker run --rm -e "CONNECTION_TIMEOUT=-1" -p 3000:3000 browserless/chrome:1.46-chrome-stable
Then run the tests from the root of pkgsite:
./all.bash npx jest [files]
PKGSITE_URL can https://pkg.go.dev, or http://localhost:8080 if you have a local instance for the frontend running.
If the tests failure, diffs will be created that show the cause of the failure. Timeouts and diff thresholds are configurable for image snapshots if adjustments are needed to prevent test flakiness. See the API for jest image snapshots for more information.
Tests are written in the Jest framework using Puppeteer to drive a headless instance of Chrome.
Familiarize yourself with the Page class from the Puppeteer documenation. You'll find methods on this class that let you to interact with the page.
Most tests will follow a similar structure but for details on the Jest framework and the various hooks and assertions see the API.