I need a test plan made for my smart irrigation system

I am developing a smart irrigation system and I need to come up with a system test plan. A template from online could be used but it needs to be tailored to my project specifically. The components in my system include: Water tank, water pump, water hose, Dht11 sensor, relay, arduino uno, LCD display screen, float sensor for water level, moisture sensor and a 3.7V power supply.