Description
When running deno test --coverage some files are not included in the resulting JSON files.
As a developer I also want to see completely uncovered files in my codecov report.

Reproduction

git clone https://github.com/dhardtke/prandium.git
cd prandium
deno test --coverage=./cov --unstable --allow-all
grep -r "index.controller.ts" cov

index.controller.ts is not tested (yet) and does not appear in the JSON files and the resulting lcov report.

Possible Workaround
A workaround might be to explicitly provide the list of all files to deno test, regardless of whether they include tests or not.

Side Note
What's odd is that I had a couple of executions of deno test --coverage where it did generate JSON files for the index.controller.ts but I am no longer able to reproduce this behavior.