Hypothetically, the NBA would need to test at the Hotel before the Players get on the bus to the practice facility. They need a Rapid Test. QMC says its test will give positive results in 3 minutes or confirm a negative (disease free) result in 15 minutes. So the Player would wait 15 minutes while the test was working. That's a short time for a test.

Same idea for anyone going to work in a store, for example.