package backendpool

import "testing"

func TestPoolSeparatesRuntimeCapacityFromDeliveries(t *testing.T) {
	pool := New(2)
	if !pool.Acquire("one") || !pool.Acquire("two") || pool.Acquire("three") {
		t.Fatal("capacity was not enforced")
	}
	if !pool.Acquire("one") {
		t.Fatal("redelivery must be idempotent")
	}
	pool.Release("one")
	if !pool.Acquire("three") || pool.Active() != 2 {
		t.Fatalf("active=%d", pool.Active())
	}
}

func TestRestoreMayTemporarilyExceedReducedCapacity(t *testing.T) {
	pool := New(1)
	pool.Restore("one")
	pool.Restore("two")
	if pool.Active() != 2 || pool.Acquire("three") {
		t.Fatalf("active=%d", pool.Active())
	}
}