add tests

apps/api/src/domain/auth/Public.test.ts

@@ -0,0 +1,40 @@
+import { SetMetadata } from '@nestjs/common';
+import { Public, PUBLIC_ROUTE_METADATA_KEY } from './Public';
+
+// Mock SetMetadata
+vi.mock('@nestjs/common', () => ({
+  SetMetadata: vi.fn(() => () => {}),
+}));
+
+describe('Public', () => {
+  it('should return a method decorator', () => {
+    const decorator = Public();
+    expect(typeof decorator).toBe('function');
+  });
+
+  it('should call SetMetadata with correct key and value', () => {
+    Public();
+    
+    expect(SetMetadata).toHaveBeenCalledWith(PUBLIC_ROUTE_METADATA_KEY, {
+      public: true,
+    });
+  });
+
+  it('should return a decorator that can be used as both method and class decorator', () => {
+    const decorator = Public();
+    
+    // Test as method decorator
+    const mockTarget = {};
+    const mockPropertyKey = 'testMethod';
+    const mockDescriptor = { value: () => {} };
+    
+    const result = decorator(mockTarget, mockPropertyKey, mockDescriptor);
+    
+    // The decorator should return the descriptor
+    expect(result).toBe(mockDescriptor);
+  });
+
+  it('should have correct metadata key', () => {
+    expect(PUBLIC_ROUTE_METADATA_KEY).toBe('gridpilot:publicRoute');
+  });
+});