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|
//go:build !windows
package journaltest
import (
"bytes"
"context"
"io"
"os/exec"
"strings"
"syscall"
"testing"
"time"
)
func TestInstallMockEmitsScenarioAndRecordsParsedFlags(t *testing.T) {
mock := InstallMock(t, Scenario{
Default: Invocation{
Lines: []string{"default"},
Stderr: []string{"warning"},
NoEntries: true,
},
Units: map[string]Invocation{
"ssh.service": {
Lines: []string{"alpha", "beta"},
},
},
})
cmd := exec.Command(journalctlCommand, "-u", "ssh.service", "-n", "2", "--output=json")
var stderr bytes.Buffer
cmd.Stderr = &stderr
output, err := cmd.Output()
if err != nil {
t.Fatalf("run journalctl mock: %v", err)
}
if got, want := string(output), "alpha\nbeta\n"; got != want {
t.Fatalf("stdout = %q, want %q", got, want)
}
if stderr.Len() != 0 {
t.Fatalf("stderr = %q, want empty", stderr.String())
}
if got, want := strings.TrimSpace(mock.Args(t)), "-u ssh.service -n 2 --output=json"; got != want {
t.Fatalf("args = %q, want %q", got, want)
}
if got := strings.TrimSpace(readOptionalFile(t, mock.UnitFile)); got != "ssh.service" {
t.Fatalf("unit = %q, want ssh.service", got)
}
if got := strings.TrimSpace(readOptionalFile(t, mock.CountFile)); got != "2" {
t.Fatalf("count = %q, want 2", got)
}
if got := strings.TrimSpace(readOptionalFile(t, mock.OutputFile)); got != "json" {
t.Fatalf("output = %q, want json", got)
}
}
func TestInstallMockSupportsErrorsPartialLongLinesAndDelay(t *testing.T) {
mock := InstallMock(t, Scenario{
Default: Invocation{
Lines: []string{"alpha"},
PartialLine: "partial",
LongLineLength: 70 * 1024,
InterLineDelay: 10 * time.Millisecond,
ExitCode: 7,
NoEntries: true,
},
})
started := time.Now()
cmd := exec.Command(journalctlCommand)
output, err := cmd.CombinedOutput()
if err == nil {
t.Fatal("journalctl mock unexpectedly succeeded")
}
if exitCode := cmd.ProcessState.ExitCode(); exitCode != 7 {
t.Fatalf("exit code = %d, want 7", exitCode)
}
if elapsed := time.Since(started); elapsed < 20*time.Millisecond {
t.Fatalf("mock did not apply inter-line delay, elapsed %s", elapsed)
}
got := string(output)
if !strings.Contains(got, "-- No entries --") {
t.Fatalf("combined output missing no entries stderr: %q", got)
}
if !strings.Contains(got, "alpha\n") || !strings.Contains(got, "\npartial") {
t.Fatalf("combined output missing regular or partial line: %q", got)
}
if !strings.Contains(got, strings.Repeat("x", 70*1024)) {
t.Fatal("combined output missing long line")
}
if mock.Terminated(t) {
t.Fatal("mock recorded SIGTERM without being signaled")
}
}
func TestInstallMockCanFailFirstInvocations(t *testing.T) {
InstallMock(t, Scenario{
Default: Invocation{
Lines: []string{"after retry"},
FailFirst: 1,
FailExitCode: 9,
},
})
first := exec.Command(journalctlCommand)
if err := first.Run(); err == nil {
t.Fatal("first journalctl mock invocation unexpectedly succeeded")
}
if exitCode := first.ProcessState.ExitCode(); exitCode != 9 {
t.Fatalf("first exit code = %d, want 9", exitCode)
}
second := exec.Command(journalctlCommand)
output, err := second.Output()
if err != nil {
t.Fatalf("second journalctl mock invocation failed: %v", err)
}
if got, want := string(output), "after retry\n"; got != want {
t.Fatalf("second stdout = %q, want %q", got, want)
}
}
func TestInstallMockFollowHonorsSIGTERM(t *testing.T) {
mock := InstallMock(t, Scenario{
Default: Invocation{
FollowLines: []string{"follow"},
InterLineDelay: 20 * time.Millisecond,
},
})
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
cmd := exec.CommandContext(ctx, journalctlCommand, "-f", "-n", "0")
var stderr bytes.Buffer
cmd.Stderr = &stderr
stdout, err := cmd.StdoutPipe()
if err != nil {
t.Fatalf("open stdout: %v", err)
}
if err := cmd.Start(); err != nil {
t.Fatalf("start journalctl mock: %v", err)
}
t.Cleanup(func() {
if cmd.ProcessState == nil {
_ = cmd.Process.Kill()
}
})
buf := make([]byte, len("follow\n"))
if _, err := io.ReadFull(stdout, buf); err != nil {
t.Fatalf("read follow output: %v", err)
}
if string(buf) != "follow\n" {
t.Fatalf("first follow output = %q, want follow", string(buf))
}
if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
t.Fatalf("signal journalctl mock: %v", err)
}
if err := cmd.Wait(); err != nil {
t.Fatalf("wait after SIGTERM: %v", err)
}
mock.WaitForTerm(t, time.Second)
if !strings.Contains(stderr.String(), TermSentinel) {
t.Fatalf("stderr = %q, want term sentinel", stderr.String())
}
if got := strings.TrimSpace(readOptionalFile(t, mock.FollowFile)); got != "1" {
t.Fatalf("follow flag = %q, want 1", got)
}
}
func TestInstallMockLongDelayHonorsSIGTERMPromptly(t *testing.T) {
mock := InstallMock(t, Scenario{
Default: Invocation{
FollowLines: []string{"follow"},
InterLineDelay: time.Second,
},
})
cmd := exec.Command(journalctlCommand, "-f", "-n", "0")
var stderr bytes.Buffer
cmd.Stderr = &stderr
stdout, err := cmd.StdoutPipe()
if err != nil {
t.Fatalf("open stdout: %v", err)
}
if err := cmd.Start(); err != nil {
t.Fatalf("start journalctl mock: %v", err)
}
t.Cleanup(func() {
if cmd.ProcessState == nil {
_ = cmd.Process.Kill()
}
})
buf := make([]byte, len("follow\n"))
if _, err := io.ReadFull(stdout, buf); err != nil {
t.Fatalf("read follow output: %v", err)
}
if string(buf) != "follow\n" {
t.Fatalf("first follow output = %q, want follow", string(buf))
}
signaledAt := time.Now()
if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
t.Fatalf("signal journalctl mock: %v", err)
}
waitForTermFile(t, mock, signaledAt, 200*time.Millisecond)
waitDone := make(chan error, 1)
go func() {
waitDone <- cmd.Wait()
}()
select {
case err := <-waitDone:
if err != nil {
t.Fatalf("wait after SIGTERM: %v", err)
}
case <-time.After(time.Second):
t.Fatal("journalctl mock did not exit after SIGTERM")
}
if !strings.Contains(stderr.String(), TermSentinel) {
t.Fatalf("stderr = %q, want term sentinel", stderr.String())
}
}
func waitForTermFile(t *testing.T, mock *Mock, started time.Time, timeout time.Duration) {
t.Helper()
deadline := time.NewTimer(timeout)
defer deadline.Stop()
ticker := time.NewTicker(5 * time.Millisecond)
defer ticker.Stop()
for {
if mock.Terminated(t) {
return
}
select {
case <-deadline.C:
t.Fatalf("journalctl mock did not record SIGTERM within %s; elapsed %s", timeout, time.Since(started))
case <-ticker.C:
}
}
}
|
