ability to run coverage against a external test runner

[wighawag]

I am currently using vitest for my test

it use hardhat environment by simply importing hardhat,

Now if I install soldiity-coverage as plugin, it seems I need to make use of hardhat test task which does not let me use my vitest tests.

Is there a way to let the coverage be executed against my external test ?

Ideally I would like that to happen in memory but if that require launching a hardhat node, that would be fine enough

Note: I tried to execute vitest inside hardhat via overriding the TEST task but could not get it working, probably due to cjs / esm

[cgewecke]

@wighawag Is it impossible to launch vitest from a task? e.g it's not a problem specifically with overriding "test"?

solidity-coverage attaches to the in-memory provider to watch the test execution trace. It won't work with an independent node. I don't know enough about vitest to understand what should be done but if you have an example I could look at am happy to check it out.

In principle it should be possible to use the internal API solidity-coverage's own task uses to get something working around any test framework as long as it provides hooks for starting and finishing the test suite. (The API docs are a little inaccurate - they predate the existence of the hardhat client)

If you can launch vitest from a hardhat task, I'd suggest stealing all the code in the coverage task and adapting it to launch vitest somehow...

[wighawag]

I managed to get something working: https://github.com/wighawag/vitest-solidity-coverage/