Spacemelody:
the board will input test into the sketch while I am trying to upload it.
Only if you have the editor portion of the Arduino IDE selected.
Consider your code:
Spacemelody:
if(digitalRead(fx1)==HIGH){
Keyboard.print("test");
}
The simplest way to make it stop typing is to merely connect pin 0 to GND. Then it will not read HIGH and the Keyboard.print() statement won't run.