ScanningRecipes that don't add/modify/delete files should report the estimated time savings other than zero

[bmuschko]

What version of OpenRewrite are you using?

• Moderne Sass v10.181.0

How are you running OpenRewrite?

From the Sass UI.

What is the smallest, simplest way to reproduce the problem?

Run the recipe org.openrewrite.FindGitProvenance against one or many repositories. I am only using this recipe as an example in this case to demonstrate the issue. Say, I'd write a custom ScanningRecipe that only generates files but doesn't change any, I think I would see the same issue.

What did you expect to see?

The "Estimated time savings" on the "Summary" tab should report a higher number than 0. Every recipe sets 5 minutes as the default for the estimated savings. Given that a ScanningRecipe doesn't override the method, I'd expect the same behavior.

Maybe this is expected behavior but it is not clearly documented as of now. Maybe you can clarify.

What did you see instead?

The "Estimated time savings" on the "Summary" tab should reports 0 even though the data tables produced by the recipe have been populated. Work has been done even though no files were changed.