Crash tests are used to ensure that a document can be loaded without crashing or experiencing other low-level issues that may be checked by implementation-specific tooling (e.g. leaks, asserts, or sanitizer failures).
Crashtests are identified by the string
-crash in the filename, or
by being in a directory called
The simplest crashtest is a single HTML file with any content. The test passes if the load event is reached, and the browser finishes painting, without terminating.
In some cases crashtests may need to perform work after the initial page load.
In this case the test may specify a
class=test-wait attribute on the root
element. The test will not complete until that attribute is removed from the
root. At the time when the test would otherwise have ended a
event is emitted; test authors can use this event to perform modifications that
are guaranteed not to be batched with the initial paint. This matches the
behaviour of reftests.