add test for correct result state when user has won or tied
remove unused import
update code to new move api
update tests referee tests to new api
create setup board manually, don't depend on board instance
test has_tied function when game is tied
forgot to update setup function to use board variable
test has_won returns false without winning position
simplify tests by setting attributes during setUp
initial strategy test
test suggested move when board is empty
fix returning too early in suggest move function
test suggest move when about to win