package api

// Owner review (P5a): the default pool is built once, safely, when concurrent first requests
// arrive on a server with no pool configured (run under -race).

import (
	"sync"
	"testing"
)

func TestDefaultPoolConcurrentFirstUse(t *testing.T) {
	s, _ := setupAPI(t, nil)
	var wg sync.WaitGroup
	got := make(chan any, 16)
	for i := 0; i < 16; i++ {
		wg.Add(1)
		go func() { defer wg.Done(); got <- s.pool() }()
	}
	wg.Wait()
	close(got)
	var first any
	for p := range got {
		if first == nil {
			first = p
		}
		if p != first || p == nil {
			t.Fatal("pool() returned different or nil pools")
		}
	}
}