A check button is a button(s) that is being used when the user is given an optional action, or when the user can select multiple choices.
Bellow are two check buttons one that by default is unchecked and one that by default is checked.
You can make tests that check wether the buttons are checked or unchecked, or yuo can create tests that are checking or unchecking the check button and then check if the check button is was checked or unchecked successfully.
Writing about check buttons can get really interesting.
So go ahead and tell me what do you have a bike or a car? Or both? Or neither?
Check buttons for testing purposes
I have a bike
I have a car