用Jasmine和TypeScript模拟getCurrentPosition

// 假设我们有一个函数需要使用 getCurrentPosition
function getLocation() {
  return new Promise((resolve, reject) => {
    navigator.geolocation.getCurrentPosition(resolve, reject);
  });
}

// Jasmine 测试用例
describe('getLocation', () => {
  let getCurrentPositionMock;

  beforeEach(() => {
    // 创建一个模拟的 getCurrentPosition 方法
    getCurrentPositionMock = jasmine.createSpy('getCurrentPosition');
    (navigator as any).geolocation = {
      getCurrentPosition: getCurrentPositionMock
    };
  });

  it('should resolve with position when called', (done) => {
    const mockPosition = {
      coords: {
        latitude: 40.7128,
        longitude: -74.0060
      }
    };

    getCurrentPositionMock.and.returnValue(Promise.resolve(mockPosition));

    getLocation().then((position) => {
      expect(position).toEqual(mockPosition);
      done();
    });
  });

  it('should reject with error when called', (done) => {
    const mockError = new Error('Position unavailable');

    getCurrentPositionMock.and.returnValue(Promise.reject(mockError));

    getLocation().catch((error) => {
      expect(error).toEqual(mockError);
      done();
    });
  });
});