ts-setup-example ts-setup-example

package.json

{
  "name": "zora-coverage",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "ts-node sum.spec.ts",
    "test:only": "RUN_ONLY=true ts-node sum.spec.ts",
    "test:coverage": "c8 --exclude to-be-excluded.ts ts-node sum.spec.ts",
    "dev": "nodemon sum.spec.ts"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "c8": "~7.7.2",
    "nodemon": "~2.0.7",
    "ts-node": "~9.1.1",
    "zora": "^4.1.0"
  }
}

sum.spec.ts

import {test} from 'zora';
import sum from './sum'

test(`sum`, (t) =>{
    t.eq(sum(0,4), 4);
})

sum.ts

import {foo} from './to-be-excluded';

foo();

export default (a: number, b: number): number => a + b;

to-be-excluded.ts

export const foo = () => {
    console.log(foo);
}

I've had no luck with this.

I use esbuild, which requires "type": "module", and this won't work with that. (the same issue probably affects other bundlers that rely on type - like parcel or microbundle...)

I also tried the experimental ESM feature in ts-node - so node --loader ts-node/esm instead of ts-node, that doesn't work either, just errors at the first import or export statement.

I had more luck with this approach in zora-recipes:

https://github.com/lorenzofox3/zora-recipes/blob/master/3_node_typescript/package.json

Still, no luck with c8 and code-coverage though. (will post more on that here.)