What is the scheme of testing chained promises in JS?

I'm trying to understand how to use Jasmine for nested promises testing in JS. What will be the approximate scheme to do so?

I have a code, that represents an elf's movements. The idea is, to check the reaction of the elf on different gems, e.g. "pirop" in my case. My function consists of chained promises. Can somebody give me a hint, please, how can I test my piece of code, using Jasmine. I've read, that I need to use Jasmine clock, but I can not understand how to do so.

Function to test:

function pirop(elf) {
   return new Promise((resolve => {
       setTimeout(() => {
           bothLegsIn(elf);
           bothHandsUp(elf).then(() => {
               bothLegsOut(elf);
               bothHandsDown(elf);
           });
           resolve(elf);
       }, elf.danceSpeed);
   }));

}

Test function:

it("Pirop: legs in, hands up, then legs out, hands down",     function(done) {

    let gem = "Pirop";
    let elf = {
        danceSpeed: 10,
        stance: [0, 0, 0, 0],
    }

    pirop(elf, gem).then(data => {
        expect(elf.stance).toEqual([0, 0, 0, 0]);
    })
});

The initial posture (stance) is [0, 0, 0, 0]. The final is the same. The stance after "legs in, hands up" will be [1, 1, 1, 1]. So I need to test both postures in one test.