testFailed

Returns whether a test has already failed. This will be the case when [glib.global.testFail], [glib.global.testIncomplete] or [glib.global.testSkip] have been called, but also if an assertion has failed.

This can be useful to return early from a test if continuing after a failed assertion might be harmful.

The return value of this function is only meaningful if it is called from inside a test function.