ci: add automated testing workflow

Author: Mosas2000

.github/workflows/test.yml

@@ -0,0 +1,79 @@
+name: Tests
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+
+jobs:
+  unit-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+          cache-dependency-path: frontend/package-lock.json
+      
+      - name: Install dependencies
+        run: cd frontend && npm ci
+      
+      - name: Run unit tests
+        run: cd frontend && npm test -- --coverage
+      
+      - name: Upload coverage
+        uses: codecov/codecov-action@v3
+        with:
+          directory: ./frontend/coverage
+
+  e2e-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+          cache-dependency-path: frontend/package-lock.json
+      
+      - name: Install dependencies
+        run: cd frontend && npm ci
+      
+      - name: Install Playwright
+        run: npx playwright install --with-deps
+      
+      - name: Run E2E tests
+        run: npx playwright test
+      
+      - name: Upload test results
+        if: always()
+        uses: actions/upload-artifact@v3
+        with:
+          name: playwright-report
+          path: playwright-report/
+
+  contract-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+      
+      - name: Install dependencies
+        run: npm ci
+      
+      - name: Run Hardhat tests
+        run: npx hardhat test
+      
+      - name: Generate coverage
+        run: npx hardhat coverage