ci(test): base coverage testing

Author: Gvozd

.github/workflows/ci.yml

@@ -49,4 +49,4 @@ jobs:
       - run: npm install
       - name: Install webpack ${{ matrix.webpack-version }}
         run: npm i webpack@${{ matrix.webpack-version }}
-      - run: npm run test
+      - run: npm run test:coverage

.gitignore

@@ -1 +1,2 @@
 node_modules
+/coverage

jest.config.js

@@ -24,7 +24,7 @@ module.exports = {
   // collectCoverageFrom: null,
 
   // The directory where Jest should output its coverage files
-  // coverageDirectory: null,
+  coverageDirectory: "coverage",
 
   // An array of regexp pattern strings used to skip coverage collection
   // coveragePathIgnorePatterns: [

package.json

@@ -10,7 +10,8 @@
   "scripts": {
     "prepublishOnly": "npm run lint",
     "lint": "eslint index.js",
-    "test": "jest"
+    "test": "jest",
+    "test:coverage": "jest --coverage"
   },
   "husky": {
     "hooks": {