Different Output for Test Between IntelliJ and Maven?

Question

I have a simple check with ObjectMapper.writeValueAsString for a test to verify that no input have been changed without a developer having noticed it. It works fine but the issue is that the length diffs between JUnit and Maven.

I have tried the following things to correct it:

Cleaned the cache of IntelliJ
Verified that both of them run the same version of ObjectMapper (2.14.2)
Removed all .m2 artifacts in case something was causing issue in there

A more probably explanation is that you're somehow reusing the instance of the ObjectMapper without noticing since IntelliJ and Maven's runners have different logic as to when they instantiate a test class. Can you share the relevant snippet? — Mureinik
– Mureinik, Commented Jan 15, 2024 at 9:32
what exactly do you mean with "JUnit and Maven"? Maven executes JUnit tests as well, so what is the other method you run JUnit tests? — cyberbrain
– cyberbrain, Commented Jan 15, 2024 at 9:32
@Mureinik Maybe? I have ran all of the tests as a suite in IntelliJ and that works fine but there could be something like that, I will do some testing — David S
– David S, Commented Jan 15, 2024 at 9:33
@cyberbrain With JUnit I mean in IntelliJ by pushing the button or through the 'Run All Tests' button when running from a module. Compared to 'mvn clean install' — David S
– David S, Commented Jan 15, 2024 at 9:34
Did you specify the character encoding in your tests? It would be helpful if you can provide a minimal reproducible example in your question and also add the different methods of running the test there. — cyberbrain
– cyberbrain, Commented Jan 15, 2024 at 9:40

David S · Accepted Answer · 2024-01-15 10:53:56Z

0

Finally found it! It was locale that was playing tricks on me, in normal JUnit it defaulted to 'EN' but in maven it was 'EN_US' so appended extra characters in multiple places.

answered Jan 15, 2024 at 10:53

David S

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