| Introduction |
| ------------ |
| |
| This directory contains testsuites for CSS WG specifications, including ones |
| that do not strictly speaking define CSS features, e.g., |
| [Geometry Interfaces](https://drafts.fxtf.org/geometry/). |
| |
| The directories should be named like the specification's shortname, but without |
| any level suffix. |
| |
| As the test harness relies on the largely undocumented old CSS build system, |
| this directory has a number of test requirements specific to it: |
| |
| * support files for a given test must live in an adjacent `support` directory; |
| |
| * tests must have a [`<link rel=help>`][spec-link] pointing to what they are |
| testing; |
| |
| * for each spec so linked, test filenames must be unique; and |
| |
| * support and reference files must have unique filenames within the entire |
| `css` directory. |
| |
| |
| [spec-link]: https://web-platform-tests.org/writing-tests/css-metadata.html#specification-links |
