Add comprehensive test infrastructure with Jest, mocks, and 488 passing tests

.github/workflows/test.yml

@@ -0,0 +1,52 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [main, develop]
+  push:
+    branches: [main, develop]
+
+jobs:
+  test:
+    name: Run Tests
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      pull-requests: write
+
+    strategy:
+      matrix:
+        node-version: [22.x]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Generate Prisma Client
+        run: npm run prisma:generate
+
+      - name: Run type check
+        run: npx tsc --noEmit
+
+      - name: Run tests
+        run: npm run test:ci
+
+      - name: Upload coverage reports
+        uses: codecov/codecov-action@v4
+        if: always()
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage/lcov.info
+          flags: unittests
+          name: codecov-umbrella
+          fail_ci_if_error: false

.gitignore

@@ -26,6 +26,10 @@ Thumbs.db
 *.log
 npm-debug.log*
 
+# Test coverage
+coverage/
+*.lcov
+
 /src/generated/prisma
 
 # Github action ssh key

README.md

@@ -1,5 +1,7 @@
 # Askify
 
+[![Tests](https://github.com/jnahian/askify-bot/actions/workflows/test.yml/badge.svg)](https://github.com/jnahian/askify-bot/actions/workflows/test.yml)
+
 An internal Slack poll bot for team decisions, engagement, and feedback.
 
 ## Features
@@ -135,6 +137,37 @@ See [docs/DEPLOYMENT.md](docs/DEPLOYMENT.md) for Docker deployment instructions.
 | ORM | Prisma v7 with `@prisma/adapter-pg` |
 | Scheduler | node-cron |
 | Deployment | Docker |
+| Testing | Jest + ts-jest |
+
+## Testing
+
+Askify uses Jest for unit and integration testing.
+
+```bash
+npm test              # Run all tests
+npm run test:watch   # Run tests in watch mode
+npm run test:coverage # Run tests with coverage report
+npm run test:ci      # Run tests in CI mode
+```
+
+### Test Structure
+
+```
+__tests__/
+  fixtures/         # Test data factories
+  mocks/           # Mock utilities (Prisma, Slack client)
+  utils/           # Tests for utility functions
+  services/        # Tests for service layer
+  blocks/          # Tests for Block Kit message builders
+  actions/         # Tests for action handlers
+  commands/        # Tests for command handlers
+  views/           # Tests for modal views
+  events/          # Tests for event handlers
+  jobs/            # Tests for background jobs
+  middleware/      # Tests for middleware
+```
+
+For detailed testing guidelines, see [TESTING.md](TESTING.md).
 
 ## Documentation