WebPlatformTest

https://github.com/w3c/web-platform-tests/ is the git repository which contains W3C Web Platform Tests.

You can run those tests with a runner. The runner can be set up on your machine (can be tricky) to run the tests locally or you can use the online version: http://w3c-test.org/tools/runner/index.html.

To run the tests, open the runner web page in your favorite browser, enter "/svg" in "Run tests under path" and hit "Start". Once the tests are done "Download JSON results" save it under a 2-letter-2-digits name (such as Ch41.json, or Fx36.json, IE11.json ...) and push that to another repository https://github.com/w3c/test-results/ which contains only the results.

Additional documentation (for the runner, guidelines to write tests, ...) is available here: http://testthewebforward.org/docs/