Refactoring the test

profile.spec.js

it("saves the profile in the backend", (done) => {
    simulateChangeInPhone(change);
    let savedProfile = spyOnSaveProfile();
    eventually(() => {
        expect(savedProfile.phone).toEqual(change);
    }, done);

    saveProfileButton().simulate("click");
});

function spyOnSaveProfile(){
    let actualProfile = {};
    stubApi.saveProfile = (profile) => {
        Object.assign(actualProfile, profile);
        return Promise.resolve({message: 'Success'});
    };
    return actualProfile;
}

function eventually(expectation, done){
    spyNotifier.slowOperationFinished = () => {
        expectation();
        done();
    }
}