How to increase timeout for a single test case in mocha

Question

I m submitting a network request in a test case  but this sometimes takes longer than 2 seconds  the default timeout    How do I increase the timeout for a single test case

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If you are using in NodeJS then you can set timeout in package json   test    mocha --timeout 10000    then you can run using npm like   npm test

User · Answer

If you wish to use es6 arrow functions you can add a  timeout ms  to the end of your it definition   it  should not timeout    done    gt        doLongThing   then      gt            done               timeout 5000     At least this works in Typescript

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From command line   mocha -t 100000 test js

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This worked for me  Couldn t find anything to make it work with before   describe  quot When in a long running test quot        gt      it  quot Should not time out with 2000ms quot   async      gt        let service   new SomeService        let result   await service callToLongRunningProcess        expect result  to be true       timeout 10000      Custom Timeout

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You might also think about taking a different approach  and replacing the call to the network resource with a stub or mock object  Using Sinon  you can decouple the app from the network service  focusing your development efforts

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since I ran into this today   Be careful when using ES2015 fat arrow syntax   This will fail    it  accesses the network   done   gt       this timeout 500      will not work        this  binding refers to parent function scope in fat arrow functions       i e  the  this  object of the describe function    done          EDIT  Why it fails   As  atoth mentions in the comments  fat arrow functions do not have their own this binding  Therefore  it s not possible for the it function to bind to this of the callback and provide a timeout function   Bottom line  Don t use arrow functions for functions that need an increased timeout

User · Answer

Here you go  http   mochajs org  test-level  it  accesses the network   function done     this timeout 500      Put network code here  with done   in the callback       For arrow function use as follows   it  accesses the network    done    gt       Put network code here  with done   in the callback     timeout 500

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For test navegation on Express  const request   require  supertest    const server   require     bin www     describe  navegation        gt        it  login page   function done            this timeout 4000           const timeOut   setTimeout done  3500            request server               get   login                expect 200               then res   gt                    res text should include  Login                    clearTimeout timeOut                   done                                catch err   gt                    console log this test fullTitle    err                   clearTimeout timeOut                   done err                                In the example the test time is 4000  4s   Note  setTimeout done  3500  is minor for than done is called within the time of the test but clearTimeout timeOut  it avoid than used all these time

[mocha.js] How to increase timeout for a single test case in mocha

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