Unable to ignore lines for coverage in projen project

[michanto]

I have an AwsCdkConstructLibrary with some code I would like ignored:

    /* istanbul ignore next */
    if (TreeInspectable.TREE_INSPECTABLE_SERVICE.has(scope)) {
      throw new Error(`Should not be able to get here.  ${scope.node.path} is already inspectable.`);
    }

If I run npm run test the line counts against me in the coverage report.

If I run npx jest the same line is ignored. I can see (by running npm run test --verbose) that the test command is:

jest --passWithNoTests --coverageProvider=v8 --updateSnapshot

I have tried:

• /* istanbul ignore next */
• /* istanbul ignore if */
• /* c8 ignore next */
• /* v8 ignore next */

In all cases, npm run test counts the line against me.

I tried replacing the test command, but I cannot because it already exists. I tried removing it first, but I cannot because it is referenced elsewhere. I don't know how to change the test command to allow me to ignore lines.

[mrgrain]

Fixing this so you can change the coverage provider.

For v8 I recommend using /* c8 ignore start */ + /*c8 ignore end */. I have more success with that.
The bug aside, it is obviously not projen's job to make sure the ignore instructions work.