TEST "Move to the center square"
result=$(tictactoe_move 4)
-test "$result" = "true"
+test "$result" = '{"legal":true}'
TEST_END
TEST "Move to center square again is now illegal"
result=$(tictactoe_move 4)
-test "$result" = "false"
+test "$result" = '{"legal":false,"message":"Square is already occupied"}'
TEST_END
TEST_REPORT