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Enable branch coverage for SimpleCov

Markus Koller requested to merge enable-branch-coverage into master

What does this MR do and why?

Enables branch coverage as described at https://github.com/simplecov-ruby/simplecov#branch-coverage-ruby--25

Note: The overall coverage is still based on line coverage, this could be switched to branch coverage with an additional setting: https://github.com/simplecov-ruby/simplecov#primary-coverage. But to avoid any disruption from this change we'll keep line coverage as the primary.

To compare:

Report from master without branch coverage

97.86% covered at 71492.25 hits/line

  • 11828 files in total.
  • 284416 relevant lines, 278342 lines covered and 6074 lines missed. ( 97.86% )

Report from this MR with branch coverage

97.93% covered at 75462.23 hits/line )

  • 11828 files in total.
  • 284414 relevant lines, 278534 lines covered and 5880 lines missed. ( 97.93% )
  • 61622 total branches, 54325 branches covered and 7297 branches missed. ( 88.16% )

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

Edited by Markus Koller

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