Test an asynchronous function with jasmine without using setTimeout

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Test an asynchronous function with jasmine without using setTimeout

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#1 by (0 votes)

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I would like if someone can help me to test this function without using the setTimeout I am using in the TEST FILE. after investigating a lot I could make it walk, but that setTimeout is a time bomb. probe with jasmine-promises and in a thousand different ways but none of them worked for me

service:

angular.module('moduloPrueba', [])
  .factory('asincronico', function($q) {

  return {
    tes:tes,
  };


  function tes(){
    var deferred = $q.defer();

    setTimeout(function () {

      deferred.resolve(79);
    }, 50);

    // Return the deferred promise
    return deferred.promise;
  }

});

jasmine test:

describe('description', function () {
  var asi;
  var root;
  var res;

  beforeEach(function () {
    module('moduloPrueba');
    inject(function (asincronico, $rootScope) {
      root = $rootScope;
      asi = asincronico;
    })
  });

  it('should ', function (done) {
    asi.tes().then(function (resp) {
      res = resp;
      done();
    });

    setTimeout(function () {
      root.$digest();
      expect(res).toEqual(79);
      expect(res).not.toEqual(123);
    }, 200);

  });

});

angularjs promesas jasmine

asked by Ivan Paredes 02.04.2018 в 23:13

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1 answer

Call another .java [duplicate] Problem opening application in Yii2

score 0 · Answer 1

According to the documentation for it ()

If you want to try a function like this:

function tes(){
    var deferred = $q.defer();

    setTimeout(function () {

      deferred.resolve(79);
    }, 50);

    // Return the deferred promise
    return deferred.promise;
}

Then you should write the test as:

it('should resolve 79 after 50ms', function (done) {
    asi.tes().then(function (resp) {
      expect(resp).toEqual(79);
      done();
    });
}, 51);

The result of the promise resp you try in the success callback and the time that should delay the promise, you specify it as the last argument in it