Jarrett Allen’s offseason prep will be tested by Joel Embiid

TORONTO — The Nets are being tested with their latest back-to-back — and after Saturday’s 110-102 loss at the defending champion Raptors nobody will face a tougher exam Sunday against the visiting 76ers than Jarrett Allen.

Allen, who scored seven points but pulled down 10 rebounds for career-best 10th straight game Saturday, has taken huge strides this season, including largely getting the better of Denver’s Nikola Jokic in last Sunday’s home win over the Nuggets.

But after getting outplayed by Marc Gasol (17 points, 15 boards), now he’ll have to come back on short rest and deal with Joel Embiid, the Sixers star who has bullied him so often.

“It’s part of the job,” Allen said of the quick…