fix: equals and hashcode of several classes

[chrfwow]

This PR

Fixes some of the equals and hashcode methods in the sdk.

Related Issues

Fixes #1362

Notes

I assumed that for the classes I modified, two objects should be equal iff their underlying data is equal. E.g. the class Value. Two distinct Value objects should be equal if they represent the same data:

        Value val1 = new Value(12312312);
        Value val2 = new Value(12312312);
        assertEquals(val1, val2);

Please comment if you think there are more such cases in the sdk, or if I added this behavior somewhere it is not appropriate.

[glissand0]

Thanks for addressing the issue so promptly, appreciate it! 👍

[glissand0]

minor comment: the MutableStructure tests are in ImmutableStructureTest. Should they be moved into a separate class?

[glissand0]

Perhaps in a separate PR could we address the toString generation as well? Eg, for MutableStructure it is

public String toString() {return "MutableStructure()";}

@tostring(callSuper = true) generates what we want

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.34%. Comparing base (f8df5fb) to head (5feb3b2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1364      +/-   ##
============================================
+ Coverage     92.80%   93.34%   +0.53%     
- Complexity      468      472       +4     
============================================
  Files            43       43              
  Lines          1126     1127       +1     
  Branches         90       91       +1     
============================================
+ Hits           1045     1052       +7     
+ Misses           53       48       -5     
+ Partials         28       27       -1     

Flag	Coverage Δ
unittests	93.34% <100.00%> (+0.53%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud