Ruby - Add failing tests for issue with deserializing wrapped values

[djquan]

This is in reference to #7029.

The expected behavior is
1.) wrapped values with the default value set should serialize to a wrapped value with the default value set, but instead, they are being set to nil.

The first test fails with:
Error: test_map_wrappers_with_default_values(BasicTest::MessageContainerTest): NoMethodError: undefined method value for nil:NilClass, which matches what #7029 is seeing.

2.) The second test I added for completeness. A test that asserts the correct behavior for wrapped values with no value set.

The test structure followed the test introduced by @haberman here, #6797. My understanding of C is limited, but that PR seems to be one of the PRs that touched the Ruby code between the upgrade from 3.10.1 to 3.11.0, where this issue was introduced.

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[djquan]

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[haberman]

Thank you for these test cases. I incorporated them into my fix in #7195.

Could you give your consent to have your changes incorporated into that PR?

Some of the test cases weren't quite right though. Map values are always present, so m.map_double[0] will never return nil. I corrected that in my PR.

Thanks for submitting and sorry the fix was a bit slow.

[djquan]

@haberman Looks great, thanks! I consent to having my changes incorporated in #7195

Thanks again!

[haberman]

@djquan for the system to recognize it, you need to put @googlebot I consent into a message on #7195.

See: #7195 (comment)

[djquan]

Ahh @haberman , gotcha, done!

[haberman]

@djquan Thanks!

[acozzette]

Closing this since the changes were incorporated into #7195.