package main import "testing" func TestWrongMove(t *testing.T) { // /---+---+---\ // | X | X | X | // +---+---+---+ // | X | X | X | // +---+---+---+ // | X | X | X | // \---+---+---/ // fill the board with artificial cells for i := range cells { cells[i] = player1 } // any move beyond this point is wrong. // reason: every cell is occupied. if play(); !wrongMove { t.Errorf("wrongMove = %t; want true", wrongMove) } initCells() }