feat: add logging

src/common/logging/structured-logger.service.spec.ts

@@ -0,0 +1,44 @@
+import { StructuredLogger } from './structured-logger.service';
+
+describe('StructuredLogger', () => {
+  const context = { get: jest.fn() };
+  const pino = {
+    debug: jest.fn(),
+    info: jest.fn(),
+    warn: jest.fn(),
+    error: jest.fn(),
+  };
+
+  beforeEach(() => jest.clearAllMocks());
+
+  it('passes only allowlisted fields to Pino', () => {
+    context.get.mockReturnValue({ requestId: 'request', token: 'secret' });
+    const logger = new StructuredLogger(context as never, pino as never);
+
+    logger.info('event', {
+      userId: 'user',
+      brokerageAccountId: 'account',
+      password: 'secret',
+    });
+
+    expect(pino.info).toHaveBeenCalledWith(
+      {
+        requestId: 'request',
+        userId: 'user',
+        brokerageAccountId: 'account',
+      },
+      'event',
+    );
+  });
+
+  it('delegates event levels to Pino', () => {
+    context.get.mockReturnValue(undefined);
+    const logger = new StructuredLogger(context as never, pino as never);
+
+    logger.event('debug', 'debug event');
+    logger.event('warn', 'warn event');
+
+    expect(pino.debug).toHaveBeenCalledWith({}, 'debug event');
+    expect(pino.warn).toHaveBeenCalledWith({}, 'warn event');
+  });
+});