From 38bad59cc15f34d39c970040b9e4e65416cb40d8 Mon Sep 17 00:00:00 2001
From: w3bdesign <45217974+w3bdesign@users.noreply.github.com>
Date: Wed, 20 Nov 2024 03:49:40 +0100
Subject: [PATCH] Tests

---
 .github/workflows/codecov.yml |   2 +-
 backend/src/main.spec.ts      | 166 ++++++++++++++++++++++++++++++++++
 2 files changed, 167 insertions(+), 1 deletion(-)
 create mode 100644 backend/src/main.spec.ts

diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index e720a75b..7d447b64 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -25,7 +25,7 @@ jobs:
           node-version: '22'
 
       - name: Install pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
           version: 8
           run_install: false
diff --git a/backend/src/main.spec.ts b/backend/src/main.spec.ts
new file mode 100644
index 00000000..edd08cbf
--- /dev/null
+++ b/backend/src/main.spec.ts
@@ -0,0 +1,166 @@
+import { Test } from '@nestjs/testing';
+import { ValidationPipe, INestApplication } from '@nestjs/common';
+import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
+import { AppModule } from './app.module';
+import { NestFactory } from '@nestjs/core';
+
+// Mock AppModule
+jest.mock('./app.module', () => ({
+  AppModule: class MockAppModule {},
+}));
+
+// Mock NestFactory
+const mockApp = {
+  enableCors: jest.fn(),
+  useGlobalPipes: jest.fn(),
+  listen: jest.fn().mockResolvedValue(undefined),
+  init: jest.fn().mockResolvedValue(undefined),
+  close: jest.fn().mockResolvedValue(undefined),
+  get: jest.fn(),
+  select: jest.fn(),
+  useGlobalFilters: jest.fn(),
+  useGlobalInterceptors: jest.fn(),
+  useGlobalGuards: jest.fn(),
+  use: jest.fn(),
+} as unknown as INestApplication;
+
+jest.mock('@nestjs/core', () => ({
+  NestFactory: {
+    create: jest.fn().mockResolvedValue(mockApp),
+  },
+}));
+
+// Mock SwaggerModule
+jest.mock('@nestjs/swagger', () => ({
+  SwaggerModule: {
+    createDocument: jest.fn().mockReturnValue({
+      openapi: '3.0.0',
+      info: {
+        title: 'Hair Salon Booking API',
+        description: 'API documentation for the Hair Salon Booking System',
+        version: '1.0',
+      },
+      paths: {},
+    }),
+    setup: jest.fn(),
+  },
+  DocumentBuilder: jest.fn().mockReturnValue({
+    setTitle: jest.fn().mockReturnThis(),
+    setDescription: jest.fn().mockReturnThis(),
+    setVersion: jest.fn().mockReturnThis(),
+    addBearerAuth: jest.fn().mockReturnThis(),
+    build: jest.fn().mockReturnThis(),
+  }),
+}));
+
+// Mock console.log to reduce noise in tests
+console.log = jest.fn();
+
+describe('Bootstrap', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  afterEach(() => {
+    jest.resetModules();
+  });
+
+  it('should create NestJS application', async () => {
+    // Run the bootstrap function in isolation
+    await jest.isolateModules(async () => {
+      await require('./main');
+      expect(NestFactory.create).toHaveBeenCalledWith(AppModule);
+    });
+  });
+
+  it('should enable CORS with correct configuration', async () => {
+    await jest.isolateModules(async () => {
+      await require('./main');
+      expect(mockApp.enableCors).toHaveBeenCalledWith({
+        origin: true,
+        methods: 'GET,HEAD,PUT,PATCH,POST,DELETE,OPTIONS',
+        credentials: true,
+      });
+    });
+  });
+
+  it('should set up global validation pipe with correct configuration', async () => {
+    await jest.isolateModules(async () => {
+      await require('./main');
+      expect(mockApp.useGlobalPipes).toHaveBeenCalledWith(
+        expect.any(ValidationPipe)
+      );
+      
+      const validationPipe = (mockApp.useGlobalPipes as jest.Mock).mock.calls[0][0];
+      expect(validationPipe.options).toEqual({
+        whitelist: true,
+        transform: true,
+        forbidNonWhitelisted: true,
+        transformOptions: {
+          enableImplicitConversion: true,
+        },
+        disableErrorMessages: false,
+        validationError: {
+          target: false,
+          value: false,
+        },
+      });
+    });
+  });
+
+  it('should set up Swagger documentation', async () => {
+    await jest.isolateModules(async () => {
+      await require('./main');
+      
+      const documentBuilder = new DocumentBuilder();
+      expect(documentBuilder.setTitle).toHaveBeenCalledWith('Hair Salon Booking API');
+      expect(documentBuilder.setDescription).toHaveBeenCalledWith('API documentation for the Hair Salon Booking System');
+      expect(documentBuilder.setVersion).toHaveBeenCalledWith('1.0');
+      expect(documentBuilder.addBearerAuth).toHaveBeenCalledWith(
+        {
+          type: 'http',
+          scheme: 'bearer',
+          bearerFormat: 'JWT',
+          name: 'JWT',
+          description: 'Enter JWT token',
+          in: 'header',
+        },
+        'JWT-auth'
+      );
+      expect(documentBuilder.build).toHaveBeenCalled();
+      expect(SwaggerModule.createDocument).toHaveBeenCalled();
+      expect(SwaggerModule.setup).toHaveBeenCalledWith('api', mockApp, expect.any(Object), {
+        swaggerOptions: {
+          persistAuthorization: true,
+          docExpansion: 'none',
+          filter: true,
+          showRequestDuration: true,
+        },
+      });
+    });
+  });
+
+  it('should listen on the configured port', async () => {
+    const originalEnv = process.env.PORT;
+    process.env.PORT = '4000';
+
+    await jest.isolateModules(async () => {
+      await require('./main');
+      expect(mockApp.listen).toHaveBeenCalledWith('4000');
+    });
+
+    process.env.PORT = originalEnv;
+  });
+
+  it('should use default port 3000 when PORT env is not set', async () => {
+    const originalEnv = process.env.PORT;
+    delete process.env.PORT;
+
+    await jest.isolateModules(async () => {
+      await require('./main');
+      expect(mockApp.listen).toHaveBeenCalledWith(3000);
+    });
+
+    process.env.PORT = originalEnv;
+  });
+});