Add codecov coverage uploading (#308)

* Add codecov coverage uploading.

* ignore coverage dir, add codecov badge, use 4.0.1 of codecov action

.github/workflows/main.yml

@@ -13,8 +13,15 @@ jobs:
     - uses: actions/checkout@v4
       with:
         ref: ${{ github.event.pull_request.head.sha }}
-    - run: npm ci && npm run build
+    - run: npm ci
+    - run: npm run build
     - run: npm test
+    - run: npm run test:gen-cov
+    - name: Upload coverage to CodeCov
+      uses: codecov/codecov-action@v4.0.1
+      with:
+        directory: ./coverage
+        token: ${{ secrets.CODECOV_TOKEN }}
 
   integration_test_botToken:
     runs-on: ubuntu-latest

.gitignore

@@ -2,3 +2,4 @@ node_modules
 .DS_Store
 .nyc_output
 dist
+coverage

README.md

@@ -1,5 +1,7 @@
 # Slack Send GitHub Action
 
+[![codecov](https://codecov.io/gh/slackapi/slack-github-action/graph/badge.svg?token=OZNX7FHN78)](https://codecov.io/gh/slackapi/slack-github-action)
+
 Send data into Slack using this GitHub Action!
 
 ## Sending Variables

package.json

@@ -6,8 +6,9 @@
   "scripts": {
     "lint": "eslint .",
     "local": "act public --eventpath .github/workflows/local/event.json --secret-file .github/workflows/local/.env --platform ubuntu-latest=node:20-buster",
-    "test:mocha": "nyc mocha --config .mocharc.json test/*-test.js",
-    "test": "npm run lint && npm run test:mocha",
+    "test:mocha": "mocha --config .mocharc.json test/*-test.js",
+    "test:gen-cov": "nyc --reporter=lcov npm run test:mocha",
+    "test": "npm run lint && nyc npm run test:mocha",
     "build": "npx @vercel/ncc build src/index.js --license licenses.txt"
   },
   "repository": {