Add basic demos tests
Add basic demos tests

[Issue] N/A
[Problem] No test for demos
[Solution] Add basic demos tests

HunseopJeong/WATT,HunseopJeong/WATT,HunseopJeong/WATT,HunseopJeong/WATT,HunseopJeong/WATT,HunseopJeong/WATT