test: 为边界条件修复添加测试用例

- rooms: parseRoomNumber 未知格式、楼层0、capacity ?? 测试
- occupancies: capacity undefined/null/0 fail-closed 防守测试
- schedules: startTime > endTime 拒绝测试
- attendance: 重叠检查按时间排序、raw[index] 移除测试
- expenses: 金额零/负/NaN 拒绝、period反转校验测试

5 modules, 40 tests, all passing

apps/server/src/expenses/expenses.boundaries.spec.ts

@@ -104,4 +104,110 @@ describe('ExpensesService boundaries', () => {
     await expect(service.batchDeletePersonalExpenses([1, 2])).rejects.toBeInstanceOf(BadRequestException);
     expect(personalExpRepo.createQueryBuilder).not.toHaveBeenCalled();
   });
+
+  describe('batchImportPersonalExpenses', () => {
+    it('rejects zero amount', async () => {
+      const { service } = createService();
+      const result = await service.batchImportPersonalExpenses([
+        {
+          studentName: '张三',
+          expenseType: '其他',
+          amount: 0,
+          expenseDate: '2026-07-01',
+          description: '测试',
+        },
+      ]);
+      expect(result.imported).toBe(0);
+      expect(result.skipped).toBe(1);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0]).toContain('费用金额必须大于0');
+    });
+
+    it('rejects negative amount', async () => {
+      const { service } = createService();
+      const result = await service.batchImportPersonalExpenses([
+        {
+          studentName: '张三',
+          expenseType: '其他',
+          amount: -100,
+          expenseDate: '2026-07-01',
+          description: '测试',
+        },
+      ]);
+      expect(result.imported).toBe(0);
+      expect(result.skipped).toBe(1);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0]).toContain('费用金额必须大于0');
+    });
+
+    it('rejects NaN amount', async () => {
+      const { service } = createService();
+      const result = await service.batchImportPersonalExpenses([
+        {
+          studentName: '张三',
+          expenseType: '其他',
+          amount: NaN,
+          expenseDate: '2026-07-01',
+          description: '测试',
+        },
+      ]);
+      expect(result.imported).toBe(0);
+      expect(result.skipped).toBe(1);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0]).toContain('费用金额最多保留两位小数');
+    });
+
+    it('allows valid positive amount', async () => {
+      const { service, personalExpRepo } = createService();
+      const result = await service.batchImportPersonalExpenses([
+        {
+          studentName: '张三',
+          expenseType: '其他',
+          amount: 500,
+          expenseDate: '2026-07-01',
+          description: '测试',
+        },
+      ]);
+      expect(result.imported).toBe(1);
+      expect(result.skipped).toBe(0);
+      expect(personalExpRepo.save).toHaveBeenCalled();
+    });
+
+    it('allows fractional amount with two decimal places', async () => {
+      const { service, personalExpRepo } = createService();
+      const result = await service.batchImportPersonalExpenses([
+        {
+          studentName: '张三',
+          expenseType: '其他',
+          amount: 99.99,
+          expenseDate: '2026-07-01',
+          description: '测试',
+        },
+      ]);
+      expect(result.imported).toBe(1);
+      expect(result.skipped).toBe(0);
+      expect(personalExpRepo.save).toHaveBeenCalled();
+    });
+  });
+
+  describe('batchImportUtilityExpenses', () => {
+    it('rejects reversed period (end before start)', async () => {
+      const { service } = createService();
+      const result = await service.batchImportUtilityExpenses([
+        {
+          periodStr: '2026-02-08 ~ 2026-01-21',
+          roomNumber: '101',
+          electricityAmount: 100,
+          electricityFee: 50,
+          waterAmount: 0,
+          waterFee: 0,
+          totalFee: 50,
+        },
+      ]);
+      expect(result.imported).toBe(0);
+      expect(result.skipped).toBe(1);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0]).toContain('账期无效');
+    });
+  });
 });