The real test came after Jared and Mahonri Moriancumer had both died and we are told to our great relief that Orihah governed the people humbly and justly. Furthermore he taught the people to remember how generous God had been to bring them to the promised land and by serving God and maintaining a righteous, peaceful society, verse 28 says they became exceedingly rich.
So these were the circumstances when Jared and Mahonri Moriancumer passed to their eternal reward. But at least they had the satisfaction of knowing they had left the affairs of the people in good hands.