LAHAINA, Hawaii — The mid-term exam isn’t complete. But in the first phase of the Colorado men’s basketball team testing itself against college basketball’s elite, the Buffaloes struggled. And the test is about to get even more difficult. The Buffs opened play in the Maui Invitational on Monday and were handed a harsh reality check by Michigan State, which got to the rim at will and out-toughed CU inside while handing the Buffs their first loss of the season, 72-56, at the Lahaina Civic Center. CU will have to regroup in a hurry, as it continues play in the tournament on Tuesday against second-ranked, two-time defending champion UConn, which was upset in overtime by Memphis in Monday’s opening game. Last week, Boyle described the three-game Maui trip as a “mid-term” exam for his club.