Definition result of the extensiontest is same
From MediaWiki extension testing
When a Wikiation_exttest.py runs a test on a testcase the possible can be :
Result : Same
The result of the test is the same as expected. This is allmost equal to "Test ok"
If the behaviour of the extension should not be changed since the last test then this IS ok. But if the behaviour of the extension should result in a different output then this might not be ok.
Same is something a program can measure. A program can not give a value of right or wrong, only a human can do so. A human can decide that Same means Ok. But that is often very easy to after the test is run.