Always passes.
Passes if the incoming value is equal to the buffer value.
Passes if the incoming value is greater than or equal to the buffer value.
Passes if the incoming value is greater than the buffer value.
Passes if the incoming value is less than or equal to the buffer value.
Passes if the incoming value is less than the buffer value.
Never passes.
Passes if the incoming value is not equal to the buffer value.
Testing functions.