Context in before differs when it's in a nested describe vs top level

[ORESoftware]

Hey all, I am trying to wrap my head around the contexts in the before hooks.

One discrepancy I noticed was the following

As you can see, for the first before hook in the top-level describe "currentTest" is undefined as we would probably expect, since before() hooks don't pertain to a particular test.

But what I didn't except was in the nested describe, the before hook 'this' value has "currentTest" defined. When I inspected with the debugger I could verify this. Why is this the case? Perhaps explaining this might help me understand Mocha contexts. Thanks!

[ORESoftware]

here is the original test code that generated the above:

describe('a',function(){


    before(function(){

        console.log('before this a:',this.parent);

    });

    beforeEach(function(){

        console.log('beforeEach this a:',this.parent);

    });


    it('a', function(done){

        console.log('it this a:', this.parent);

        done();

    });


    describe('b',function(){

        before(function(){

            console.log('before this b:',this.parent);

        });

        beforeEach(function(){

            console.log('beforeEach this b:',this.parent);

        });


        it('b', function(done){

            console.log('it this b:',this.parent);


            done();
        });



    });


});

[danielstjules]

Thanks for reporting this! Yup, this is a bug. A smaller reproduce case:

describe('foo', function() {
  it('test1', function() {});

  describe('nested', function() {
    before(function() {
      console.log('CURRENT:', this.currentTest.title);
    });

    it('test2', function() {});
  });
});

  foo
    ✓ test1
    nested
CURRENT: test1
      ✓ test2


  2 passing (8ms)

This is a known issue here: #1638

[ORESoftware]

thanks, yeah np I just wanted to make sure because that would throw me way off in understanding what was going on, that's funny because I commented on #1638 without really seeing the bug myself, another software dejavu moment LOL