Chore: Increase Runtime coverage

[MikaelMayer]

This PR increases the Runtime coverage by adding more tests to cover previously uncovered lines.

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

[MikaelMayer]

Closing/Reopening PR because it seems that code coverage was below the previous value, which happens randomly. Given that this PR increases code coverage, this shouldn't happen, so running it again to have a second chance.
Anyway, even in that mode where some covered lines were missed, the PR is still at 87% lines covered (98681 / 113983) which might be 2% more than before.

[MikaelMayer]

Reopening the PR made all tests to pass the first time, which resulted in a complete code coverage of 88%, which is indeed +2% of code coverage.

99992 / 113983

But the branch is out of date so I'm going to merge it. Anyway, this PR is good to merge.

[MikaelMayer]

Should we now increase the coverage threshold to 87% ?

[keyboardDrummer]

Some warnings are generated for the added code

[keyboardDrummer]

Was some of the new code generated? Can you comment on why that was needed and how it was generated?

[MikaelMayer]

Was some of the new code generated? Can you comment on why that was needed and how it was generated?

Good question. The code was generated by ChatGPT, and I reviewed it manually (like fixing the warnings you mentioned). Here is the conversation I had with it.
https://chatgpt.com/share/0070188d-21c6-4c5b-a825-ab2e03a6a74b

Why ChatGPT generation.

• There is no macro system native to C# that I thought would be useful, like in Rust
• It was extremely efficient to use ChatGPT for this task because it's straightforward (it took less than 2 minutes after writing the first three test cases to generate the remaining 13 others)
• These coverage tests are a one-off and I don't expect them to change anytime soon.
• If they need to change, any LLM should be able to update them
• ChatGPT is one of the best chatbots in its free version.

I just realized we could simplify the assertions of the length in a loop to reduce the size of the file, which I just did.

[keyboardDrummer]

Was some of the new code generated? Can you comment on why that was needed and how it was generated?

Good question. The code was generated by ChatGPT, and I reviewed it manually (like fixing the warnings you mentioned). Here is the conversation I had with it. https://chatgpt.com/share/0070188d-21c6-4c5b-a825-ab2e03a6a74b

Why ChatGPT generation.

• There is no macro system native to C# that I thought would be useful, like in Rust
• It was extremely efficient to use ChatGPT for this task because it's straightforward (it took less than 2 minutes after writing the first three test cases to generate the remaining 13 others)
• These coverage tests are a one-off and I don't expect them to change anytime soon.
• If they need to change, any LLM should be able to update them
• ChatGPT is one of the best chatbots in its free version.

I just realized we could simplify the assertions of the length in a loop to reduce the size of the file, which I just did.

Could you leave a comment describing the generation in the code? That way someone can regenerate it when necessary.