在斷言期間承諾被拒絕時，Karma通過測試

Question

如果承諾本身在'does fail'測試中被拒絕，則測試失敗，正如我所期望的那樣。如果斷言失敗/錯誤被拋出/承諾在承諾的「當時」被拒絕，我會記錄說ERROR: 'Unhandled promise rejection'並且測試通過。我如何讓它拒絕而不是記錄拒絕未處理？

import { expect } from 'chai'; 

describe.only('What?',() => { 
    const e = new Error('NOPE'); 

    it('does fail',() => Promise.reject(e)); 

    it('should fail when rejected',() => { 
    const promise = new Promise(r => r()); 

    promise.then(() => Promise.reject(e)); 

    return promise; 
    }); 

    it('should fail when thrown, then caught then rejected',() => { 
    const promise = new Promise(r => r()); 

    promise 
     .then(() => { throw e; }) 
     .catch(() => Promise.reject('huh')); 

    return promise; 
    }); 

    it('should fail/reject when thrown, then caught then rethrown',() => { 
    const promise = new Promise(r => r()); 

    promise 
     .then(() => { throw e; }) 
     .catch(er => { throw er; }); 

    return promise; 
    }); 

    it(`doesn't matter if I expect`,() => { 
    const promise = new Promise(r => r()); 

    promise.then(() => { 
     expect(1).to.eq(2); 
    }); 

    return promise; 
    }); 
}); 

然後報告...

START: 
    What? 
    ✖ does fail 
    ✔ should fail when rejected 
ERROR: 'Unhandled promise rejection', Error{stack: undefined} 
    ✔ should fail when thrown, then caught then rejected 
ERROR: 'Unhandled promise rejection', 'huh' 
    ✔ should fail/reject when thrown, then caught then rethrown 
ERROR: 'Unhandled promise rejection', Error{stack: undefined, line: 47567, sourceURL: 'http://localhost:9876/base/test/test_index.js?7f696b0b50c0a51c7a2fa5278582072b20241a3b'} 
    ✔ doesn't matter if I expect 
ERROR: 'Unhandled promise rejection', AssertionError{message: 'expected 1 to equal 2', showDiff: true, actual: 1, expected: 2, stack: 'AssertionError@http://localhost:9876/base/test/test_index.js?7f696b0b50c0a51c7a2fa5278582072b20241a3b:39222:25 

Answer 1

你必須返回then(...)的返回值，而不是你創建的第一個應許。