Mocked methods cannot be called from the original constructor of a partially mocked class about phpunit HOT 4 CLOSED

Brief update: The confidence Garvin has shown me that I will be able to solve the problem has motivated me to continue thinking about the problem and working on a solution.

I currently have the situation here (local, not committed and pushed) that @sbuerk's test is green. Whoopee! However, several other tests are red. Oh no!

Let's hope that I manage to turn all the tests green again ...

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Please don't get me wrong, I don't want to deny any blame, nor do I want to blame users of PHPUnit. The only person I blame is myself and I am sorry that PHPUnit 11.2 broke your tests.

Just dropping by to say that there's no blame at all, and those nightly tests are there for us to catch things early, and search for solutions. Thank you and @sbuerk for inspecting this so quickly, and I'm sure there'll be a solution. :-)

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PHPUnit 11.2 has added support for extendable classes that are declared readonly to its test double functionality. This required extensive changes to the runtime internals of the test double functionality. These changes are the reason why tests like the one you have provided as an example no longer work. I am grateful to you for reporting this, as I was not aware of this problem before.

Side note: maybe we can discuss at the TYPO3 code sprint this week whether the TYPO3 project can also test in its nightly CI pipeline with the current development version of PHPUnit. This would allow us to uncover such problems earlier.

The problem you found is ultimately due to the fact that the test double functionality of PHPUnit supports not only interfaces, but also extendable classes. The fact that only a selection of the methods of an extendable class can be replaced makes the whole thing even worse.

Please don't get me wrong, I don't want to deny any blame, nor do I want to blame users of PHPUnit. The only person I blame is myself and I am sorry that PHPUnit 11.2 broke your tests.

I will try my best to fix this issue, but at least right now I am not very hopeful that it can be fixed (without reverting #5804).

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I have an idea how to solve this, now I need to find time to give it a try.

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