Yes, the wrong usage of return values are the issue that cause leakage.
As far as running into trouble, unless you have a massive amount of tests, you won't actually run out of memory, so, like you, probably 99% of mock users won't hit any issues, but its worth keeping that article in your mind if you see some weird behavior on your tests.
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Yes, the wrong usage of return values are the issue that cause leakage.
As far as running into trouble, unless you have a massive amount of tests, you won't actually run out of memory, so, like you, probably 99% of mock users won't hit any issues, but its worth keeping that article in your mind if you see some weird behavior on your tests.