how could I write a unit test for the following : Using C# - MStest

public class API_FIRM_LINKController : ODataController

private Entities db =new Entities();

{

public IQueryable GetAPI_FIRM_LINK()

{

return db.API_FIRM_LINK;

}

public SingleResult GetAPI_FIRM_LINK([FromODataUri] Guid key)

{

return SingleResult.Create(db.API_FIRM_LINK.Where(aPI_FIRM_LINK => aPI_FIRM_LINK.ApiFirmLInkId == key ));

}

Test files :

public class API_FIRM_LINKControllerTests

{

public void GetAPI_FIRM_LINKTest()

//arrange

//act

//assert

public void GetAPI_FIRM_LINKTest1()

{

//arrange

//act

//assert

}

If someone could assist me , it might be simple