I searched for examples of "recovered" Coronavirus patients testing negative for the virus after recovery, and instead of finding any evidence this is possible, I found something much worse reported in the New England Journal of Medicine.
https://www.nejm.org/doi/full/10.1056/NEJMc2001468?query=featured_coronavirus"In this context,
the detection of 2019-nCoV and a high sputum viral load in a convalescent patient (Patient 1) arouse concern about prolonged shedding of 2019-nCoV after recovery."
A patient with no symptoms tested positive for the Virus. He then developed symptoms and recovered. After recovery, he still had a large amount of virus being extruded in his mucus and saliva.
So what we have is evidence of being contagious before and after you develop the flu like symptoms or pneumonia 
Now supposedly after he is done shedding the virus for a while perhaps his body completely kills off the virus like in the cold or the flu, but I have not been able to find one confirmed example of any "recovery" including no more virus in the system.
Many viruses stay with you for years or till you are dead or we find a cure. Hundreds of strains of HPV can take a year or two for your body to get rid of, while HSV-1 and HSV-2 viruses last forever in your system. Hepatitus can stay in a person for years and of course HIV we know lasts forever except in a few rare cases of cures.
Id feel a lot better about this virus if I saw some scientific evidence of patients achieving a full cure, bc if people are going to be spreading this thing for years on end then its just a matter of time before everyone has Aids-Flu.
Perhaps when they say a patient has recovered, they mean no more virus present in the body, but it would be nice if they would be specific. Perhaps its too early and they just dont know.