使用错误消息扩展JASMINE匹配器

// 自定义匹配器
beforeEach(() => {
  jasmine.addMatchers({
    toBeWithinRange: () => {
      return {
        compare: (actual, expectedMin, expectedMax) => {
          const result = {
            pass: actual >= expectedMin && actual <= expectedMax,
            message: () => `Expected ${actual} to be within range [${expectedMin}, ${expectedMax}]`
          };
          return result;
        }
      };
    }
  });
});

// 使用自定义匹配器
describe('Custom Matcher Example', () => {
  it('should pass if number is within range', () => {
    expect(5).toBeWithinRange(1, 10);
  });

  it('should fail with custom message if number is out of range', () => {
    expect(15).toBeWithinRange(1, 10);
  });
});