$ zig test priority_queue.zig
Test [1/2] test "priority queue (max heap)"...
Executing:  Make tea (priority 5)
Executing:  Feed Cat (priority 4)
Executing:  Clear drains (priority 3)
Executing:  Tax returns (priority 2)
Executing:  Solve RC tasks (priority 1)

Test [2/2] test "priority queue (min heap)"...
Executing:  Solve RC tasks (priority 1)
Executing:  Tax returns (priority 2)
Executing:  Clear drains (priority 3)
Executing:  Feed Cat (priority 4)
Executing:  Make tea (priority 5)

All 2 tests passed.