// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
// SPDX-License-Identifier: MIT

package server

import (
	"os"
	"syscall"
	"testing"
)

// The transient accept errors are survivable; anything else is not.
func TestTransientAccept(t *testing.T) {
	transient := []error{
		os.NewSyscallError("accept", syscall.ECONNABORTED),
		os.NewSyscallError("accept", syscall.EMFILE),
		os.NewSyscallError("accept", syscall.ENFILE),
		os.NewSyscallError("accept", syscall.EAGAIN),
		os.NewSyscallError("accept", syscall.EINTR),
	}
	for _, err := range transient {
		if !transientAccept(err) {
			t.Fatalf("%v classified as fatal", err)
		}
	}
	if transientAccept(os.NewSyscallError("accept", syscall.EACCES)) {
		t.Fatal("EACCES classified as transient")
	}
	if transientAccept(os.ErrClosed) {
		t.Fatal("a closed listener classified as transient")
	}
}