Angular单元测试的一个错误消息

错误消息：

‘expect’ was used when there was no current spec, this could be because an asynchronous test timed out

原始的单元测试代码：

describe('Jerry for Spartacus unit test', () => {

  const valueService = new ValueService();

  expect(valueService.getValue()).toEqual('Jerry');
} );      

解决方法

describe('Jerry for Spartacus unit test', () => {

  it('#getValue unit test here!', () => {
    const valueService = new ValueService();
    expect(valueService.getValue()).toEqual('Jerry');
  });
});