917 improve code coverage of ide secir

[lenaploetzke]

Changes and Information

Please briefly list the changes (main added features, changed items, or corrected bugs) made:

• Changed one value in the test for parameters.h so that the uncovered lines are now covered.
• Deleted the first check of check_constraints in modelbecause this case already leads to an error in the construction of a model.

If need be, add additional information and what the reviewer should look out for in particular:

-

Merge Request - Guideline Checklist

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Checks by code author

• [x] Every addressed issue is linked (use the "Closes #ISSUE" keyword below)
• [x] New code adheres to coding guidelines
• [x] No large data files have been added (files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• [x] Tests are added for new functionality and a local test run was successful
• [x] Appropriate documentation for new functionality has been added (Doxygen in the code and Markdown files if necessary)
• [x] Proper attention to licenses, especially no new third-party software with conflicting license has been added
• [ ] (For ABM development) Checked benchmark results and ran and posted a local test above from before and after development to ensure performance is monitored.

Checks by code reviewer(s)

• [ ] Corresponding issue(s) is/are linked and addressed
• [ ] Code is clean of development artifacts (no deactivated or commented code lines, no debugging printouts, etc.)
• [ ] Appropriate unit tests have been added, CI passes, code coverage and performance is acceptable (did not decrease)
• [ ] No large data files added in the whole history of commits(files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• [ ] On merge, add 2-5 lines with the changes (main added features, changed items, or corrected bugs) to the merge-commit-message. This can be taken from the briefly-list-the-changes above (best case) or the separate commit messages (worst case).

Closes #917

[lenaploetzke]

The problem with the uncovered lines 227-230 in parameters.h was that there is a check for negative probabilities (210-214), so that the value -1 already leads to a returned true there.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (d4cb5ee) 96.22% compared to head (6c42373) 96.26%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #923 +/- ## ========================================== + Coverage 96.22% 96.26% +0.04% ========================================== Files 124 124 Lines 9699 9699 ========================================== + Hits 9333 9337 +4 + Misses 366 362 -4 ```

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[mknaranja]

Merged with #959 .