This ensures that not only the return values match the expected results, but also that their type is the same.
Going forward, stricter type checking by using `assertSame()` should generally be preferred to `assertEquals()` where appropriate, to make the tests more reliable.
Follow-up to [49904], [49925], [49992], [50012], [50013], [50065], [50075], [50131], [50150], [50157].
See #38266, #52482.
git-svn-id: https://develop.svn.wordpress.org/trunk@50284 602fd350-edb4-49c9-b593-d223f7449a82