Is jasmine supposed to execute specs in the order they are declared or in a random order?

Question

un-comment the last spec. All hell breaks loose... why?

describe('test', function() {
  var index = 1;

  it('test 1', function() {
    expect(index).toBe(1);
    index++;
  });

  it('test 2', function() {
    expect(index).toBe(2);
    index++;
  });

  it('test 3', function() {
    expect(index).toBe(3);
    index++;
  });

  it('test 4', function() {
    expect(index).toBe(4);
    index++;
  });

  it('test 5', function() {
    expect(index).toBe(5);
    index++;
  });

  it('test 6', function() {
    expect(index).toBe(6);
    index++;
  });

  it('test 7', function() {
    expect(index).toBe(7);
    index++;
  });

  it('test 8', function() {
    expect(index).toBe(8);
    index++;
  });

  it('test 9', function() {
    expect(index).toBe(9);
    index++;
  });

  it('test 10', function() {
    expect(index).toBe(10);
    index++;
  });

  // it('test 11', function() {
  //   expect(index).toBe(11);
  //   index++;
  // });

});

thanks to @PWKad for pointing out this happens when there are more than 10 tests.

Solution 1

Yes, Jasmine executes the specs (it) in order. There was an issue from 2.3.0 to 2.3.3 with more than 10 specs. I hit the same issue in 2.3.3, the issue is fixed in 2.3.4.

https://github.com/jasmine/jasmine/issues/850

I just used 2.3.4 in place of 2.3.3 and my 15 tests finally passed.

Solution 2

Currently (v2.x) Jasmine runs tests in the order they are defined. However, there is a new (Oct 2015) option to run specs in a random order, which is still off by default. According to the project owner, in Jasmine 3.x it will be converted to be the default.

References:

• Feature Discussion
• User Story in the Project Tracker
• Feature Pull Request

Solution 3

Here I am now in 2021, and indeed, the default setup via npx jasmine init sets random test order by default it seems.

Surely not what most developers would expect. (Not what I expected!)

To run in declared order, go into your spec/support/jasmine.json and set:

"random": false