Yes they are definitely testing you. I would sit each one down seperately and professionally discuss the issues you are having. Have your examples with you so you know what you want to speak about. Let them know there are 2 of them and you are always willing to help them do their job, but a CNA/CWJ cannot help you do your job and there are things you must complete in your shift. Let them know that speaking with a doc, doing a discharge, ect takes presidence over helping them sit patients up, helping with a bath ect. ESPECIALLY since there are 2 of them and only 1 of you.
Be sure that you remain in control of the coversation, but always stay in a calm voice and allow your team member to voice their opinion. Nothing is worst then losing control, starting to yell, getting emotional, ect. You will lose even more respect.
If you feel you need to, let your unit manager know that you have had this conversation to the CNA and CWJ and how it went, the outcome, ect. If things do not get better after that (even though I think they will) then go to your unit manager and speak to them about writing them up, ect.
If you go directly to writing them up before speaking with them, you will not gain their respect and they will only resent you and things will get worse. There are a whole lot more CNA jobs out there than RN jobs, and they know they can always get another job.
Good luck, and I hope things get better for you, hang in there!