Improve and align html-output

[AlbertMietus]

I like MutMut; it has become a default tool in in my toolset. However, ...

The result is sometimes a bit hard to grasp. This while the html-report (index.html) is a very-simple table (and file does not comply to the current HTML-standard)
When doing a big project, we got a long list (table) in no particular order. So it hard to find the part (eg dir) to focus on. Nor is is conviniant to find the worst files

My request is to improve this, and align it to e.g coverage, another tool in my toolbox.

Although it's another tool, they are comparable in use and reporting. For example coverage html also gives a table with measurements pro file. See this Example Report

• One can sort (up/down) on any column (click on header)
• One can filter (see box top-right)
  Probably (read: hopefully) one can reuse a lot of that code.

Thanks

[boxed]

I personally don't use the html report and don't really see the point of it. But I am open to PRs to improve it for those who do find it useful.

[rouke-broersma]

In case any mutmut user is interested in improving the html reporting capabilities, I would like to gently plug https://github.com/stryker-mutator/mutation-testing-elements which we created as a generic mutation testing report including a json schema, with the intent that we could hopefully standardize mutation testing output across tools.

An example of what it looks like here: https://dashboard.stryker-mutator.io/reports/github.com/stryker-mutator/robo-coasters-example/master#mutant

[boxed]

Nice. That seems much more sane to support than maintaining a reporting infrastructure in mutmut itself!

[boxed]

For my own future reference:
Use https://docs.pydantic.dev/latest/integrations/datamodel_code_generator/ on https://raw.githubusercontent.com/stryker-mutator/mutation-testing-elements/refs/heads/master/packages/report-schema/src/mutation-testing-report-schema.json to generate a python schema for this?