Mocha在Promise回调中的测试失败时超时

时间:2018-11-14 13:06:14

标签: mocha es6-promise

如果我具有以下模块:

module.exports = kontinue => {
  Promise.resolve({error:null})
    .then(o => {
      console.log('promise resolved');
      // say something goes wrong here
      if(true)
        kontinue({error:'promise resolved but something else went wrong'});
      else kontinue(o);
    })
    .catch(error => {
      console.log('caught error');
      kontinue({error:'promise rejected, or resolved but then continuation threw exception'})
    });
};


以及以下测试:

const assert = require('assert').strict;
const target = require('./the_above_code.js');

it('should not timeout', (done) => {
  target((sut) => {
    console.log('continuation called');
    assert.ok(false); // the test for sut.error === what I expected was failing
    done();
  });
});


它输出:

promise resolved
continuation called
caught error

...

Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.


我意识到这是因为.catch()返回的新承诺无法解决,但这不是我在测试期间真正想要的。

我该如何测试承诺解决的对象,如有必要,请通过测试,并让Mocha报告失败?

也许除了延续(在使用此模块的代码中永远不会返回)之外的其他地方,我还可以进行测试?

我确定monad可以减少此处的样板代码数量,但是肯定使用它们会违反Kernighan's maxim

0 个答案:

没有答案