No coverage information is generated for vscode extension using nyc - node.js

Question

To generate the code coverage report for vscode extension, i am using nyc and running those via vscode test runner.
Source : https://code.visualstudio.com/api/working-with-extensions/testing-extension
Project structure:
out
-test
-unit
-testcases.js
-index.js
- runTest.js
``
"test": "rm -rf .nyc_output/ && nyc node ./out/test/runTest.js",
"nyc": {
"extends": "#istanbuljs/nyc-config-typescript",
"require": [
"ts-node/register",
"source-map-support/register"
],
"report-dir": ".",
"reporter": [
"text",
"html",
"lcov"
],
"exclude": ["out/test/**"],
"include": [ "out/**/*.js" ],
"check-coverage": true
},
index.ts file:
import * as path from 'path';
import * as Mocha from 'mocha';
import * as glob from 'glob';
export function run(): Promise<void> {
const mocha = new Mocha({
ui: 'tdd',
color: true,
timeout: 20000,});
const testsRoot = path.resolve(__dirname, '../unit');
return new Promise((c, e) => {
glob('**/**.test.js', { cwd: testsRoot }, (err, files) => {
if (err) {
return e(err);
}
// Add files to the test suite
files.forEach(f => {
mocha.addFile(path.resolve(testsRoot, f));
});
try {
// Run the mocha test
mocha.run(failures => {
if (failures > 0) {
e(new Error(`${failures} tests failed.`));
} else {
c();
}
});
} catch (err) {
// eslint-disable-next-line no-console
console.error(err);
e(err);
}
});
});
}
runTest.ts file:
import * as path from 'path';
import { runTests } from 'vscode-test';
async function main() {
try {
// The folder containing the Extension Manifest package.json
// Passed to `--extensionDevelopmentPath`
const extensionDevelopmentPath = path.resolve(__dirname, '../../');
// The path to test runner
// Passed to --extensionTestsPath
//const extensionTestsPath = path.resolve(__dirname, './unit/index-coverage');
const extensionTestsPath = path.resolve(__dirname, './unit/index');
// Download VS Code, unzip it and run the integration test
await runTests({ extensionDevelopmentPath, extensionTestsPath });
} catch (err) {
//console.error('Failed to run tests');
process.exit(1);
}
}
main();
I was not able to generate code coverage report.It generates report but without any information.
What i am doing wrong here??

Answer 1

There are couple of ways to do this. I found some valuable information while checking below link:
How do a generate vscode TypeScript extension coverage report
Seems the easiest one is from user frenya. but the other two also gives valuable information.