I'm trying to implement the infection/infection php mutation testing library into a new project of mine. I've set up some tests which all pass, then ran infection.
Infection returns the following:
You are running Infection with xdebug enabled.
____ ____ __ _
/ _/___ / __/__ _____/ /_(_)___ ____
/ // __ \/ /_/ _ \/ ___/ __/ / __ \/ __ \
_/ // / / / __/ __/ /__/ /_/ / /_/ / / / /
/___/_/ /_/_/ \___/\___/\__/_/\____/_/ /_/
Running initial test suite...
PHPUnit version: 7.4.0
23 [============================] < 1 sec
Generate mutants...
Processing source code files: 3/3
Creating mutated files and processes: 14/14
.: killed, M: escaped, S: uncovered, E: fatal error, T: timed out
SSSSSSSSSSSSSS (14 / 14)
14 mutations were generated:
0 mutants were killed
14 mutants were not covered by tests
0 covered mutants were not detected
0 errors were encountered
0 time outs were encountered
Metrics:
Mutation Score Indicator (MSI): 0%
Mutation Code Coverage: 0%
Covered Code MSI: 0%
Please note that some mutants will inevitably be harmless (i.e. false positives).
Time: 1s. Memory: 10.00MB
When I dug a little deeper into my infection-log.txt, I found that many of the uncovered mutants were for the Function Signature Visibility mutator.
The issue I am running into is that my tests do cover those methods. I manually changed some of my methods from public to protected, re-ran my phpunit tests and the tests failed. I'm really not sure where to proceed from here. I have a hunch that infection isn't properly detecting my phpunit test suite, but I cannot find any discussion about this being an issue elsewhere.
If anyone has any ideas let me know.
This issue was on me! Running around in circles for hours only to find out it was your own fault is a real pain.
I had the set the phpunit configuration option forceCoversAnnotation which makes it so that
"Code Coverage will only be recorded for tests that use the @Covers annotation documented in @Covers."
At no point was I using @Covers annotations, nor do I think I would normally. I apologise for the confusing issue, thanks!