How do I focus on one spec in jasmine.js?

Question

I have a bunch of failing specs from a rather large architectural change. I\'d like to work on fixing them one by one by tagging each one with \'focus\'.

Does jasmin

Answer 1

In core since 2.1 with fit and fdescribe.

Answer 2

You can create your all your specs up front but disable them with xdescribe and xit until you're ready to test them.

describe('BuckRogers', function () {
  it('shoots aliens', function () {
    // this will be tested
  });

  xit('rescues women', function () {
    // this won't
  });
});

// this whole function will be ignored
xdescribe('Alien', function () {
  it('dies when shot', function () {
  });
});

Answer 3

For anyone stumbling upon this, a better approach, which you can set up from the code itself, is to use this plugin: https://github.com/davemo/jasmine-only

It allows you set the spec exclusivity right on the code like this:

describe.only("MySpec", function() { 
  it('function 1', function() { 
    //... 
  }) 

  it.only('function 2', function() { 
    //... 
  }
})
// This won't be run if there are specs using describe.only/ddescribe or it.only/iit
describe("Spec 2", function(){}) 

There has been a long discussion to get this added to Jasmine core, see: https://github.com/pivotal/jasmine/pull/309

If you happen to be using Jasmine via Karma/Testacular you should already have access to ddescribe() and iit()

Answer 4

Not exactly what you've asked for but adding iit will test only that particular spec and ignore all others in the file, ddescribe works in the same way. So you can focus on a particular spec using iit or ddescribe

Answer 5

With stand-alone Jasmine(2.0.0), on the spec_runner.htlm, I could click a specific spec and focus on that one spec. I should have noticed this feature earlier.

Answer 6

This is the most simplified answer with a practical example .Even in fdescribe you can run few it blocks using it. f means focus.

Also in a none fdescribe block which is just describe, you can select only specific it blocks by marking them as fit.

Please run the below code and observe the console log, also read the comments in the code. Read this author's article it helps too . https://davidtang.io/2016/01/03/controlling-which-tests-run-in-jasmine.html

 //If you want to run few describe only add f so using focus those describe blocks and it's it block get run

  fdescribe("focus description i get run with all my it blocks ", function() {
    it("1 it in fdescribe get executed", function() {
        console.log("1 it in fdescribe get executed unless no fit within describe");

    });
    it("2 it in fdescribe get executed", function() {
        console.log("2 it in fdescribe get executed unless no fit within describe");

    });
    //but if you and fit in fdescribe block only the fit blocks get executed
    fit("3  only fit blocks in  fdescribe get executed", function() {
        console.log("If there is  a fit   in fdescribe only fit blocks  get executed");

    });
  });

  describe("none description i get skipped with all my it blocks ", function() {
        it("1 it in none describe get skipped", function() {
            console.log("1 it in none describe get skipped");

        });
        it("2 it in none describe get skipped", function() {
            console.log("2 it in none describe get skipped");
        });
//What happen if we had fit in a none fdescribe block will it get run ?   yes  
       fit("3 fit in none describe get executed too eventhough it;s just describe ", function() {
            console.log("3 fit in none describe get executed too");
        }); 
      });