Code: Increase target code coverage ratio up to 80% before v3.9.0

[WHUweiqingzhou]

Describe the Code Quality Issue

According to the latest coverage test, the current coverage is 74.11%. We need at least 6000 lines to cover and make the coverage up 80%. It is worth mentioning that, this file with more than 5000 lines shows zero coverage:

Additional Context

No response

Task list for Issue attackers (only for developers)

• [ ] Identify the specific code file or section with the code quality issue.
• [ ] Investigate the issue and determine the root cause.
• [ ] Research best practices and potential solutions for the identified issue.
• [ ] Refactor the code to improve code quality, following the suggested solution.
• [ ] Ensure the refactored code adheres to the project's coding standards.
• [ ] Test the refactored code to ensure it functions as expected.
• [ ] Update any relevant documentation, if necessary.
• [ ] Submit a pull request with the refactored code and a description of the changes made.

[jinzx10]

Hi @WHUweiqingzhou , PR #5513 adds an accuracy test to the Lebedev quadrature and covered ~5000 lines of code.

But I think I'm not able to figure out another ~1000 lines of coverage that I can test with ease. Maybe it's better to resort to respective module maintainers to do the job.