Hi,
I dont think you need to test prior final medical. There will be no problem if you do not have any TB history, any contagious disease or need costly treatment.
Still, if you want to be sure, They usually do-
1. serological test(blood test- CBC, ESR etc)
2. Urine RME
3. Chest X-ray
4. Blood pressure check
5. weight, height and eyesight check
They will ask you whether You have diabetes or hypertension, if you take any regular medication. If the answer is yes, they will do further some tests to see your BP/Blood sugar is controlled.
Then the doctor will meet you and may check you. thats all...............