Feat/backend unit tests

.github/workflows/backend-ci.yml

@@ -39,3 +39,6 @@ jobs:
 
     - name: Build
       run: bun run build
+
+    - name: Run tests
+      run: bun run test

apps/backend/jest.config.js

@@ -0,0 +1,34 @@
+/** @type {import('jest').Config} */
+export default {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  roots: ['<rootDir>/src'],
+  testMatch: [
+    '**/__tests__/**/*.ts',
+    '**/?(*.)+(spec|test).ts'
+  ],
+  transform: {
+    '^.+\\.ts$': ['ts-jest', {
+      tsconfig: {
+        verbatimModuleSyntax: false,
+        esModuleInterop: true,
+        allowSyntheticDefaultImports: true,
+        module: 'commonjs',
+        target: 'es2020'
+      }
+    }],
+  },
+  collectCoverageFrom: [
+    'src/**/*.ts',
+    '!src/**/*.d.ts',
+    '!src/**/*.spec.ts',
+    '!src/**/*.test.ts'
+  ],
+  coverageDirectory: 'coverage',
+  coverageReporters: ['text', 'lcov', 'html'],
+  moduleFileExtensions: ['ts', 'js', 'json'],
+  verbose: true,
+  clearMocks: true,
+  resetMocks: true,
+  restoreMocks: true
+};

apps/backend/package.json

@@ -16,12 +16,15 @@
     "@types/bun": "latest",
     "@types/cors": "^2.8.19",
     "@types/express": "^5.0.3",
-    "@types/node": "^24.1.0",
+    "@types/jest": "^30.0.0",
+    "@types/node": "^24.2.0",
     "@typescript-eslint/eslint-plugin": "^8.38.0",
     "@typescript-eslint/parser": "^8.38.0",
     "eslint": "^9.32.0",
     "eslint-config-prettier": "^10.1.8",
+    "jest": "^30.0.5",
     "prettier": "^3.6.2",
+    "ts-jest": "^29.4.1",
     "ts-node": "^10.9.2",
     "typescript": "^5.8.3",
     "typescript-eslint": "^8.30.0"
@@ -30,6 +33,9 @@
   "scripts": {
     "dev": "bun run --watch src/index.ts",
     "build": "bun build src/index.ts --outdir ./dist --target node",
+    "test": "bun x jest",
+    "test:watch": "bun x jest --watch",
+    "test:coverage": "bun x jest --coverage",
     "lint": "bun eslint src/**/*.ts",
     "format": "bun prettier --write 'src/**/*.ts'",
     "setup": "bun run scripts/setup.ts",