how to debug stored procedure in sql server 2008

HI

for debuging in VS I put breakPoint on line and click on F10 key and it debug step by step

Now I want debug storeprocedure in sql  below is my SP

create procedure dbo.debug

@name nvarchar(20)
,@Transfer nvarchar(30)
,@Type nvarchar(30)
,@Mobile varchar(20)

AS
BEGIN
DECLARE @Result AS int
IF NOT EXISTS(SELECT id FROM Estate_free WHERE (@Mobile IS NOT NULL AND Mobil = @Mobile))
BEGIN

insert into Estate_free(name,Transfer,Type)
values(@name,@Transfer,@Type)
	SET @Result = 1
END
else
begin
	SET @Result = 0
END

END

in this SP I should enter some parameters

I want checked IF condesion will be run or else will be run?

How I can debug it ?

thanks alot