Add the context manager method `assertQueryCount` to count queries, the decorator `@users(...)` to execute a test for several users, and the decorator `@warmup` to execute a test twice (warm-up, then real).
Add the context manager method `assertQueryCount` to count queries, the decorator `@users(...)` to execute a test for several users, and the decorator `@warmup` to execute a test twice (warm-up, then real).