[BUG] - Nondeterminism in unit tests in MessageTest due to JSON parameter ordering #4970
Description
Steps to Reproduce
Issue: This is the same issue as #4946 involving JSON comparisons. Here it's happening in both the should_encode_register_type and should_encode_unregister_type unit tests within the MessageTest class. In summary, since JSONs are unordered, after converting them to strings, the parameter ordering is not guaranteed, which can lead to the tests failing occasionally. For another example of this issue being addressed, see this previous merged PR.
These two tests were flagged via the NonDex tool, which detects potentially unreliable tests due to underlying Java API assumptions. To see the Nondex output for the test class MessageTest, you can run:
mvn -pl service-registry/registry-lightweight edu.illinois:nondex-maven-plugin:2.1.7:nondex -Dtest="org.apache.servicecomb.registry.lightweight.MessageTest"
Expected Behavior
The tests should pass regardless of which order the JSON parameters are stringified.
Servicecomb Version
3.3.0
Additional Context
I will add a PR with a potential fix in the discussion.