This example assumes different test files for each operating system, and the test harness runs only the tests appropriate to the operating system.
These three test files, in combination, test all the statements in Core-AAM role=heading mapping table.
| Edge on Windows | Firefox on Windows | Chromium on Linux | Firefox on Linux | Chromium on macOS | Firefox on macOS | Safari on macOS | |
|---|---|---|---|---|---|---|---|
| `role="heading"` (Windows) | 2/2 | 1/2 | n/a | n/a | n/a | n/a | n/a |
| `role="heading"` (Linux) | n/a | n/a | 1/1 | 1/1 | n/a | n/a | n/a |
| `role="heading"` (macOS) | n/a | n/a | n/a | n/a | 1/1 | 1/1 | 1/1 |