This small test suite has been built to test the link checker at W3C, but could be used for any tool used to either check links in HTML documents, spiders, or miscellaneous Web User-Agents by adding the proper Python module in harness/lib.

The test suite uses a series of hardcoded domain names for its operation, listed in the hosts file. They should be added to your local DNS resolution before running the crawler under test. On Unix systems, this can be obtained by appending the cost of the hosts file to /etc/hosts, or, on linux by running the command-under-test in a dedicate execution namespace, à la

 bwrap --dev-bind / / --ro-bind hosts /etc/hosts sh -c "command args"