feat: add POST /accounts endpoint to create new WhatsApp account records

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/modules/accounts/accounts.service.spec.ts

@@ -1,4 +1,5 @@
 import { Test, TestingModule } from '@nestjs/testing';
+import { ConfigService } from '@nestjs/config';
 import { AccountsService } from './accounts.service';
 import { PrismaService } from '../../prisma/prisma.service';
 import * as QRCode from 'qrcode';
@@ -11,13 +12,28 @@ const mockAccounts = [
   { id: 'acc_1', platform: 'whatsapp', jid: '111@s.whatsapp.net', displayName: 'Test Account', status: 'ACTIVE' },
 ];
 
+const mockCreatedAccount = {
+  id: 'acc_new',
+  platform: 'whatsapp',
+  jid: 'pending_uuid@placeholder',
+  displayName: 'My Number',
+  status: 'ACTIVE',
+};
+
 const mockPrisma = {
   account: {
     findMany: jest.fn().mockResolvedValue(mockAccounts),
     findUnique: jest.fn(),
+    create: jest.fn().mockResolvedValue(mockCreatedAccount),
   },
 };
 
+const mockConfig = {
+  get: jest.fn().mockImplementation((key: string, def: string) =>
+    key === 'WHATSAPP_SESSION_PATH' ? './sessions' : def,
+  ),
+};
+
 describe('AccountsService', () => {
   let service: AccountsService;
 
@@ -27,6 +43,7 @@ describe('AccountsService', () => {
       providers: [
         AccountsService,
         { provide: PrismaService, useValue: mockPrisma },
+        { provide: ConfigService, useValue: mockConfig },
       ],
     }).compile();
     service = module.get<AccountsService>(AccountsService);
@@ -63,4 +80,42 @@ describe('AccountsService', () => {
       expect(result).toEqual({ status: 'not_found', qrDataUrl: null });
     });
   });
+
+  describe('create()', () => {
+    it('creates account with platform whatsapp and status ACTIVE', async () => {
+      await service.create('My Number');
+      expect(mockPrisma.account.create).toHaveBeenCalledWith(
+        expect.objectContaining({
+          data: expect.objectContaining({
+            platform: 'whatsapp',
+            status: 'ACTIVE',
+            displayName: 'My Number',
+          }),
+        }),
+      );
+    });
+
+    it('generates a unique sessionPath under WHATSAPP_SESSION_PATH', async () => {
+      await service.create();
+      const call = mockPrisma.account.create.mock.calls[0][0];
+      expect(call.data.sessionPath).toMatch(/^\.\/sessions\/.+/);
+    });
+
+    it('generates a placeholder jid prefixed with pending_', async () => {
+      await service.create();
+      const call = mockPrisma.account.create.mock.calls[0][0];
+      expect(call.data.jid).toMatch(/^pending_/);
+    });
+
+    it('sets displayName to null when not provided', async () => {
+      await service.create();
+      const call = mockPrisma.account.create.mock.calls[0][0];
+      expect(call.data.displayName).toBeNull();
+    });
+
+    it('returns the created account summary', async () => {
+      const result = await service.create('My Number');
+      expect(result).toEqual(mockCreatedAccount);
+    });
+  });
 });