How can I unit test a model within Android?

Below I have an example of a model I have created within Android Studio to be utilised within my application.

Could someone with experience in this area, offer me examples of unit tests I could perform to test this model (in android) to get me started?

- I'm referring to Unit Testing via Google Android Testing

code for Contact model:

public class Contact extends MainModel
{
    private Long id;
    private String personName;
    private String phoneNumber;
    private String occupation;



    public Long getId() 
    { 
        return id; 
    }

    public void setId(Long id)
    { 
        this.id = id; 
    }



    public String getPersonName() 
    { 
        return personName; 
    }

    public void setPersonName(String personName) 
    { 
        this.personName = personName; 
    }



    public String getPhoneNumber()
    { 
        return phoneNumber; 
    }

    public void setPhoneNumber(String phoneNumber) 
    { 
        this.phoneNumber = phoneNumber; 
    }



    public String getOccupation()
    {
        return occupation;
    }

    public void setOccupation(String occupation)
    {
        this.occupation = occupation;
    }

}