Your doctor will have you take one or more of the following to both confirm the diagnosis and to check in with how your diabetes is being managed:
A1C Test
Fasting Blood Sugar Test
Glucose Tolerance Test
Random Blood Sugar Test
Once you have been diagnosed with diabetes there are further tests that you will no doubt be expected to perform at home, which requires the monitor, the testing strips, lancets, and a power source as well as a carrying case.