Is there a way to calculate diff coverage?

[adrianotr]

I noticed that ReportGenerator supports setting minimumCoverageThresholds:lineCoverage, which is ok for validating overall coverage. However, I couldn’t find a way to calculate or enforce coverage deltas across the report history.

In most CI pipelines, I aim to fail the build if new or changed code doesn’t meet a defined coverage threshold, rather than basing the decision on the overall project coverage.

Is there currently a way to:

• Compare the latest report to the previous one (from -historydir)?
• Enforce a threshold based on the difference or regression in coverage between those two runs?

If not, is there an alternative approach or best practice you’d recommend for this use case?

[danielpalme]

@adrianotr

Regarding your questions:

• You can use the report type MarkdownDeltaSummary (Example: https://reportgenerator.io/resources/reports/MarkdownDeltaSummary/DeltaSummary.md) or TextDeltaSummary (Example: https://reportgenerator.io/resources/reports/TextDeltaSummary/DeltaSummary.txt).
• There is no such option. I recommend using a fixed minimum coverage. If a (small) threshold is allowed, overall coverage can decrease over time