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// Copyright 2018 CoreOS, Inc.
//
// 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.
package journal
import (
"fmt"
"io/ioutil"
"runtime"
"strconv"
"strings"
"testing"
)
func TestJournalEnabled(t *testing.T) {
enabled := Enabled()
if !enabled {
t.Fatalf("journald socket not detected")
}
}
func TestValidVarName(t *testing.T) {
validTestCases := []string{
"TEST",
"TE_ST",
"TEST_",
"0TEST0",
}
invalidTestCases := []string{
"test",
"_TEST",
"",
}
for _, tt := range validTestCases {
if err := validVarName(tt); err != nil {
t.Fatalf("\"%s\" should be a valid variable", tt)
}
}
for _, tt := range invalidTestCases {
if err := validVarName(tt); err == nil {
t.Fatalf("\"%s\" should be an invalid variable", tt)
}
}
}
func TestJournalSend(t *testing.T) {
if !Enabled() {
t.Skip("systemd journal not available locally")
}
// an always-too-big value (hopefully)
hugeValue := 1234567890
// a value slightly larger than default limit,
// see `SO_SNDBUF` in socket(7)
largeValue := hugeValue
if wmem, err := ioutil.ReadFile("/proc/sys/net/core/wmem_default"); err == nil {
wmemStr := strings.TrimSpace(string(wmem))
if v, err := strconv.Atoi(wmemStr); err == nil {
largeValue = v + 1
}
}
// small messages should go over normal data,
// larger ones over temporary file with fd in ancillary data
testValues := []struct {
label string
len int
}{
{
"empty message",
0,
},
{
"small message",
5,
},
{
"large message",
largeValue,
},
{
"huge message",
hugeValue,
},
}
// This is memory intensive, so we manually trigger GC before and after each test.
for i, tt := range testValues {
t.Logf("journal send test #%v - %s (len=%d)", i, tt.label, tt.len)
runtime.GC()
err := SendAlloc(i, tt.label, tt.len)
if err != nil {
t.Fatalf("#%v: failed sending %s: %s", i, tt.label, err)
}
runtime.GC()
}
}
func SendAlloc(run int, label string, len int) error {
largeVars := map[string]string{
"KEY": string(make([]byte, len)),
}
msg := fmt.Sprintf("go-systemd test #%v - %s", run, label)
return Send(msg, PriCrit, largeVars)
}