} else {
			extra.Insert(str)
		}
	}
	if len(notFound) != 0 || len(extra) != 0 {
		return fmt.Errorf("not found: %v, extra: %v", notFound.UnsortedList(), extra.UnsortedList())
	}
	return nil
}

func TestGetNodeIPs(t *testing.T) {
	type expectation struct {
		matchAll bool
		ips      sets.Set[string]
	}

	testCases := []struct {
		name          string
		cidrs         []string
		itfAddrsPairs []InterfaceAddrsPair

		err := CanUseIPVSProxier(ctx, ipvs, versioner, tc.scheduler)
		if (err == nil) != tc.ok {
			t.Errorf("Case [%s], expect %v, got err: %v", tc.name, tc.ok, err)
		}
	}
}

func TestGetNodeIPs(t *testing.T) {
	testCases := []struct {
		isIPv6       bool
		devAddresses map[string][]string
		expectIPs    []string
	}{
		// case 0
		{