假设我有一个小规范,如:
describe("feature", () => {
it("does stuff", () => {
return myPromiseBasedFn().then(result => {
expect(result).to.eql(1);
});
});
});
目前,当承诺被拒绝时,我只看到错误消息。例如:
12 passing (88ms)
1 failing
1) feature does stuff:
TypeError: Cannot read property 'method' of undefined
如何让mocha打印出此错误的完整堆栈跟踪?例如,我想看看
TypeError: Cannot read property 'method' of undefined
at SomeFunc (code/file.js:12:32)
at code/base.js:49:24
答案 0 :(得分:0)
来自此博文:https://medium.com/front-end-hacking/stack-traces-for-promises-in-node-js-46bf5f490fe4
您可以使用:
global.Promise = require("bluebird");
然后设置:
BLUEBIRD_LONG_STACK_TRACES=1
运行测试以获得完整的堆栈跟踪时:
BLUEBIRD_LONG_STACK_TRACES=1 mocha …
这适用于Typescript,如果您使用cls-hooked
,则还需要包含:
let cls = require('cls-hooked');
let clsNamespace = cls.createNamespace('some-namespace')
let clsBluebird = require('cls-bluebird')
let Promise = require('bluebird')
clsBluebird(clsNamespace, Promise)