build: add coveralls as test coverage service

.github/workflows/test.yml

@@ -12,4 +12,10 @@ jobs:
         run: |
           npm ci
           npm run build
-          npm test
+          npm test -- --collectCoverage
+
+      - name: Coveralls
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+

README.md

@@ -5,6 +5,7 @@
 <p align="center">
     <a href="https://www.npmjs.com/package/avro-decorators"><img src="https://img.shields.io/npm/v/avro-decorators/latest.svg?style=flat-square" alt="NPM Version" /></a>
     <a href="https://github.com/wtho/avro-decorators/actions/workflows/test.yml"><img src="https://img.shields.io/github/workflow/status/wtho/avro-decorators/test/main?style=flat-square" alt="CI Tests Pipeline" /></a>
+    <a href="https://coveralls.io/github/wtho/avro-decorators?branch=main"><img src="https://img.shields.io/coveralls/github/wtho/avro-decorators?style=flat-square" alt="Test Coverage" /></a>
     <a href="https://github.com/wtho/avro-decorators/blob/main/LICENSE"><img src="https://img.shields.io/npm/l/avro-decorators?style=flat-square" alt="GitHub license" /></a>
 </p>
 

jest.config.ts

@@ -3,7 +3,7 @@ import type { Config } from '@jest/types'
 const config: Config.InitialOptions = {
   preset: 'ts-jest',
   testEnvironment: 'node',
-  coverageReporters: ['html'],
+  coverageReporters: ['html', 'lcov'],
   // do not print console from tested code
   silent: true,
 }