test(frontend): raise overall statement coverage to 30.42% for Phase 1 MVP

frontend/hooks/__tests__/use-transmittal.test.ts

@@ -0,0 +1,62 @@
+// File: frontend/hooks/__tests__/use-transmittal.test.ts
+// Change Log:
+// - 2026-06-13: Initial creation - test coverage for useTransmittal hook
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { renderHook, waitFor } from '@testing-library/react';
+import { createTestQueryClient } from '@/lib/test-utils';
+import { useTransmittal, transmittalKeys } from '../use-transmittal';
+import { transmittalService } from '@/lib/services/transmittal.service';
+
+// Mock service
+vi.mock('@/lib/services/transmittal.service', () => ({
+  transmittalService: {
+    getByUuid: vi.fn(),
+  },
+}));
+
+describe('useTransmittal hook', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  describe('transmittalKeys', () => {
+    it('ควรสร้าง cache keys ที่ถูกต้อง', () => {
+      expect(transmittalKeys.all).toEqual(['transmittals']);
+      expect(transmittalKeys.detail('uuid-1')).toEqual(['transmittals', 'detail', 'uuid-1']);
+    });
+  });
+
+  describe('useTransmittal', () => {
+    it('ควรดึงรายละเอียด transmittal สำเร็จ', async () => {
+      const mockData = { publicId: 'uuid-1', transmittalNumber: 'TR-001' };
+      vi.mocked(transmittalService.getByUuid).mockResolvedValue(mockData as any);
+      const { wrapper } = createTestQueryClient();
+      const { result } = renderHook(() => useTransmittal('uuid-1'), { wrapper });
+      await waitFor(() => {
+        expect(result.current.isLoading).toBe(false);
+      });
+      expect(result.current.transmittal).toEqual(mockData);
+      expect(transmittalService.getByUuid).toHaveBeenCalledWith('uuid-1');
+    });
+
+    it('ควรดึงรายละเอียด transmittal สำเร็จในแบบ wrapped response', async () => {
+      const mockData = { publicId: 'uuid-2', transmittalNumber: 'TR-002' };
+      vi.mocked(transmittalService.getByUuid).mockResolvedValue({ data: mockData } as any);
+      const { wrapper } = createTestQueryClient();
+      const { result } = renderHook(() => useTransmittal('uuid-2'), { wrapper });
+      await waitFor(() => {
+        expect(result.current.isLoading).toBe(false);
+      });
+      expect(result.current.transmittal).toEqual(mockData);
+    });
+
+    it('ไม่ควรทำงานเมื่อไม่ระบุ uuid', async () => {
+      const { wrapper } = createTestQueryClient();
+      const { result } = renderHook(() => useTransmittal(undefined), { wrapper });
+      expect(result.current.isLoading).toBe(false);
+      expect(result.current.transmittal).toBeUndefined();
+      expect(transmittalService.getByUuid).not.toHaveBeenCalled();
+    });
+  });
+});