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/schedules/schedules.boundaries.spec.ts

@@ -0,0 +1,137 @@
+import { BadRequestException } from '@nestjs/common';
+import { SchedulesService } from './schedules.service';
+import { ClassroomStatus } from '../entities';
+
+function mockQueryBuilder<T>(results: T[] = []) {
+  const qb = {
+    where: jest.fn().mockReturnThis(),
+    andWhere: jest.fn().mockReturnThis(),
+    orderBy: jest.fn().mockReturnThis(),
+    addOrderBy: jest.fn().mockReturnThis(),
+    getMany: jest.fn().mockResolvedValue(results),
+  };
+  return qb;
+}
+
+describe('SchedulesService — boundary conditions', () => {
+  const validDto = {
+    classId: 1,
+    classroomId: 2,
+    weekDay: 1,
+    startTime: '09:00',
+    endTime: '10:00',
+    startDate: '2026-07-01',
+    endDate: '2026-07-31',
+    subject: '数学',
+    teacherId: 1,
+  };
+
+  /** Minimal service where only scheduleRepo.create is mocked, used for early-rejection tests. */
+  function makeMinimalService() {
+    const scheduleRepo = { create: jest.fn() };
+    return {
+      service: new SchedulesService(
+        scheduleRepo as never,
+        {} as never,
+        {} as never,
+        {} as never,
+        {} as never,
+        {} as never,
+      ),
+      scheduleRepo,
+    };
+  }
+
+  /** Full service where all downstream mocks are wired so create can succeed end-to-end. */
+  function makeFullService() {
+    const scheduleRepo = {
+      createQueryBuilder: jest.fn().mockReturnValue(mockQueryBuilder([])),
+      create: jest.fn(),
+      save: jest.fn(),
+      findOne: jest.fn(),
+    };
+    const classroomRepo = {
+      findOne: jest.fn().mockResolvedValue({
+        id: 2,
+        status: ClassroomStatus.AVAILABLE,
+      }),
+    };
+    const classTeacherRepo = {
+      findOne: jest.fn().mockResolvedValue({
+        classId: 1,
+        userId: 1,
+      }),
+      find: jest.fn().mockResolvedValue([]),
+    };
+    const rentalRepo = {
+      createQueryBuilder: jest.fn().mockReturnValue(mockQueryBuilder([])),
+    };
+
+    return {
+      service: new SchedulesService(
+        scheduleRepo as never,
+        {} as never,
+        classroomRepo as never,
+        rentalRepo as never,
+        classTeacherRepo as never,
+        {} as never,
+      ),
+      scheduleRepo,
+    };
+  }
+
+  it('create rejects reversed startTime/endTime before repository access', async () => {
+    const { service, scheduleRepo } = makeMinimalService();
+
+    await expect(
+      service.create({ ...validDto, startTime: '14:00', endTime: '13:00' }),
+    ).rejects.toThrow(BadRequestException);
+
+    await expect(
+      service.create({ ...validDto, startTime: '14:00', endTime: '13:00' }),
+    ).rejects.toThrow('上课时间不能晚于下课时间');
+
+    // Validation short-circuits before any repository call.
+    expect(scheduleRepo.create).not.toHaveBeenCalled();
+  });
+
+  it('create allows startTime < endTime and proceeds through full create flow', async () => {
+    const { service, scheduleRepo } = makeFullService();
+
+    const savedSchedule = {
+      id: 1,
+      ...validDto,
+      startTime: '09:00',
+      endTime: '12:00',
+      status: 'active',
+    };
+    scheduleRepo.create.mockReturnValue(savedSchedule);
+    scheduleRepo.save.mockResolvedValue(savedSchedule);
+    scheduleRepo.findOne.mockResolvedValue(savedSchedule);
+
+    const result = await service.create({
+      ...validDto,
+      startTime: '09:00',
+      endTime: '12:00',
+    });
+
+    // Should not throw during validation.
+    expect(result).toMatchObject({ startTime: '09:00', endTime: '12:00' });
+    expect(scheduleRepo.create).toHaveBeenCalled();
+  });
+
+  it('create rejects equal startTime/endTime before repository access', async () => {
+    const { service, scheduleRepo } = makeMinimalService();
+
+    await expect(
+      service.create({ ...validDto, startTime: '09:00', endTime: '09:00' }),
+    ).rejects.toThrow(BadRequestException);
+
+    await expect(
+      service.create({ ...validDto, startTime: '09:00', endTime: '09:00' }),
+    ).rejects.toThrow('上课时间和下课时间不能相同');
+
+    // Validation short-circuits before any repository call.
+    expect(scheduleRepo.create).not.toHaveBeenCalled();
+  });
+});