Allow non-final
classes to act as suites.
#550
Merged
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Now that we require Swift 6, we can see the names of classes during
@Test
macro expansion. This was the primary blocker preventing us from allowing non-final
classes, because we had to substituteSelf
for the class name and this was invalid if the suite type could be covariant. We can drop the constraint now.Note that test functions are not heritable.
Checklist: