Discrepancies between coverage shown in Last Activity and the PR Summary

[didix21 (Dídac Coll Pujals)]

• ALM used (GitHub, Bitbucket Cloud, Azure DevOps)
• CI system used: Circle CI
• orb: sonarsource/sonarcloud@2.0.0
• Languages of the repository: Swift

Hello,

I was observing some discrepancies between SonarQube cloud > Overview > Last Activity and the PR Summary.

Case 1

For example, if I didn’t modify any executable lines in my project, the Last Activity reports a decrease of 0.1% in coverage:

Last Activity

PR Summary

Case 2

Additionally, if I modify my code without covering it with tests, I observe that the coverage in the Last Activity becomes equal to +60%:

Last Activity

PR Summary

Case 3

Another thing that I saw was in another PR, the coverage is 91.2% and the estimated coverage after merge is 85.6%. However, the Last Activity show a decrease in coverage of 0.2%.

Last Activity

PR Summary

This could be related to:

• Large discrepancy between "Estimated after merge" and overall coverage

[ganncamp (G Ann Campbell)]

Hi,

Welcome to the community!

@didix21

Case 1

For example, if I didn’t modify any executable lines

That’s not actually what your PR Summary is showing. It says there are “not enough lines to compute coverage”, not that there are no lines.

Can you check the Measures tab of this PR to see exactly what (if anything) shows up under Size → New Lines?

@didix21

Case 2

Additionally, if I modify my code without covering it with tests, I observe that the coverage in the Last Activity becomes equal to +60%:

What was the existing coverage on those modified lines? I’m willing to bet it was 60%. This isn’t looking at new coverage on changed lines, but total coverage.

@didix21

Case 3

Another thing that I saw was in another PR, the coverage is 91.2% and the estimated coverage after merge is 85.6%. However, the Last Activity show a decrease in coverage of 0.2%.

That’s all perfectly possible. 91.2% is not 100%. Since it’s such a large change (2.2k New Lines to Cover is… a lot) I can easily imagine that dragging down overall coverage.

 
Ann