First creation of Hello World project

Signed-off-by: Vinh-Tuong MAI <mvtuong90@gmail.com>
New test class

Signed-off-by: Vinh-Tuong MAI <mvtuong90@gmail.com>
Changed

Signed-off-by: Vinh-Tuong MAI <mvtuong90@gmail.com>
test

Signed-off-by: Vinh-Tuong MAI <mvtuong90@gmail.com>
printed

Signed-off-by: Vinh-Tuong MAI <mvtuong90@gmail.com>
hahaha