如何对nest中的guard进行单元测试？

npm install --save-dev @nestjs/testing jest

import { Test } from '@nestjs/testing';
import { ExecutionContext } from '@nestjs/common';
import { YourGuard } from './your.guard';
import { YourService } from './your.service';

describe('YourGuard', () => {
  let guard: YourGuard;
  let service: YourService;

  beforeEach(async () => {
    const moduleRef = await Test.createTestingModule({
      providers: [
        YourGuard,
        {
          provide: YourService,
          useValue: {
            // Mock your service methods here
          },
        },
      ],
    }).compile();

    guard = moduleRef.get<YourGuard>(YourGuard);
    service = moduleRef.get<YourService>(YourService);
  });

  it('should be defined', () => {
    expect(guard).toBeDefined();
  });

  it('should return true if guard condition is met', async () => {
    // Mock the necessary dependencies and setup the guard condition
    jest.spyOn(service, 'yourMethod').mockResolvedValue(true);

    const context: ExecutionContext = {
      // Mock the necessary properties of ExecutionContext
    };

    const result = await guard.canActivate(context);

    expect(result).toBe(true);
  });

  it('should return false if guard condition is not met', async () => {
    // Mock the necessary dependencies and setup the guard condition
    jest.spyOn(service, 'yourMethod').mockResolvedValue(false);

    const context: ExecutionContext = {
      // Mock the necessary properties of ExecutionContext
    };

    const result = await guard.canActivate(context);

    expect(result).toBe(false);
  });
});

npm run test