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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !notcpstat
// +build !notcpstat
package collector
import (
"bytes"
"encoding/binary"
"syscall"
"testing"
"github.com/josharian/native"
"github.com/mdlayher/netlink"
)
func Test_parseTCPStats(t *testing.T) {
encode := func(m InetDiagMsg) []byte {
var buf bytes.Buffer
err := binary.Write(&buf, native.Endian, m)
if err != nil {
panic(err)
}
return buf.Bytes()
}
msg := []netlink.Message{
{
Data: encode(InetDiagMsg{
Family: syscall.AF_INET,
State: uint8(tcpEstablished),
Timer: 0,
Retrans: 0,
ID: InetDiagSockID{},
Expires: 0,
RQueue: 11,
WQueue: 21,
UID: 0,
Inode: 0,
}),
},
{
Data: encode(InetDiagMsg{
Family: syscall.AF_INET,
State: uint8(tcpListen),
Timer: 0,
Retrans: 0,
ID: InetDiagSockID{},
Expires: 0,
RQueue: 11,
WQueue: 21,
UID: 0,
Inode: 0,
}),
},
}
tcpStats, err := parseTCPStats(msg)
if err != nil {
t.Fatal(err)
}
if want, got := 1, int(tcpStats[tcpEstablished]); want != got {
t.Errorf("want tcpstat number of established state %d, got %d", want, got)
}
if want, got := 1, int(tcpStats[tcpListen]); want != got {
t.Errorf("want tcpstat number of listen state %d, got %d", want, got)
}
if want, got := 42, int(tcpStats[tcpTxQueuedBytes]); want != got {
t.Errorf("want tcpstat number of bytes in tx queue %d, got %d", want, got)
}
if want, got := 22, int(tcpStats[tcpRxQueuedBytes]); want != got {
t.Errorf("want tcpstat number of bytes in rx queue %d, got %d", want, got)
}
}
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