WIP: MP 2693 create a script to ensure code coverage improvement on p rs (#194)

* feat: add coverage diff checker to test workflow

* fix: run test workflow on pull requests only

.github/workflows/test-runner.yaml

@@ -1,10 +1,6 @@
 name: Test Runner
 
-on:
-  push:
-    branches: [develop, main]
-  pull_request:
-    branches: [develop, main]
+on: pull_request
 
 jobs:
   build:
@@ -19,8 +15,13 @@ jobs:
           node-version: '20.x'
       - name: Install dependencies
         run: yarn
-      - name: Run tests
-        run: yarn test
+      - name: Test Coverage
+        id: testCoverage
+        uses: anuraag016/Jest-Coverage-Diff@master
+        with:
+          fullCoverageDiff: false
+          runCommand: 'yarn jest --collectCoverageFrom=''["src/**/*.{js,jsx,ts,tsx}"]'' --coverage --collectCoverage=true --coverageDirectory=''./'' --coverageReporters=''json-summary'' --forceExit --detectOpenHandles __tests__/**/*.test.*'
+          delta: 0.5
       # - name: Upload coverage reports to Codecov
       #   uses: codecov/codecov-action@v3
       #   with:

.gitignore

@@ -7,6 +7,7 @@
 
 # testing
 /coverage
+.coverage-summary.json
 
 # next.js
 /.next/