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package process
/**
* Code in this file is based on the source code at
* https://github.com/hashicorp/consul-template/tree/3ea7d99ad8eff17897e0d63dac86d74770170bb8/child/child_test.go
*
* Major changes include supporting api changes in child.go and removing
* tests for reloading, which was removed in child.go
*/
import (
"io/ioutil"
"os"
"os/exec"
"strings"
"testing"
"time"
"github.com/hashicorp/go-gatedio"
"github.com/hashicorp/go-hclog"
)
const fileWaitSleepDelay = 150 * time.Millisecond
func testChild(t *testing.T) *Child {
cmd := exec.Command("echo", "hello", "world")
cmd.Stdout = ioutil.Discard
cmd.Stderr = ioutil.Discard
c, err := newChild(NewInput{
Cmd: cmd,
KillSignal: os.Kill,
KillTimeout: 2 * time.Second,
Splay: 0 * time.Second,
Logger: hclog.Default(),
})
if err != nil {
t.Fatal(err)
}
return c
}
func TestNew(t *testing.T) {
stdin := gatedio.NewByteBuffer()
stdout := gatedio.NewByteBuffer()
stderr := gatedio.NewByteBuffer()
command := "echo"
args := []string{"hello", "world"}
env := []string{"a=b", "c=d"}
killSignal := os.Kill
killTimeout := fileWaitSleepDelay
splay := fileWaitSleepDelay
cmd := exec.Command(command, args...)
cmd.Stdin = stdin
cmd.Stderr = stderr
cmd.Stdout = stdout
cmd.Env = env
c, err := newChild(NewInput{
Cmd: cmd,
KillSignal: killSignal,
KillTimeout: killTimeout,
Splay: splay,
Logger: hclog.Default(),
})
if err != nil {
t.Fatal(err)
}
if c.killSignal != killSignal {
t.Errorf("expected %q to be %q", c.killSignal, killSignal)
}
if c.killTimeout != killTimeout {
t.Errorf("expected %q to be %q", c.killTimeout, killTimeout)
}
if c.splay != splay {
t.Errorf("expected %q to be %q", c.splay, splay)
}
if c.stopCh == nil {
t.Errorf("expected %#v to be", c.stopCh)
}
}
func TestExitCh_noProcess(t *testing.T) {
c := testChild(t)
ch := c.ExitCh()
if ch != nil {
t.Errorf("expected %#v to be nil", ch)
}
}
func TestExitCh(t *testing.T) {
c := testChild(t)
if err := c.Start(); err != nil {
t.Fatal(err)
}
println("Started")
defer c.Stop()
ch := c.ExitCh()
if ch == nil {
t.Error("expected ch to exist")
}
}
func TestPid_noProcess(t *testing.T) {
c := testChild(t)
pid := c.Pid()
if pid != 0 {
t.Errorf("expected %q to be 0", pid)
}
}
func TestPid(t *testing.T) {
c := testChild(t)
if err := c.Start(); err != nil {
t.Fatal(err)
}
defer c.Stop()
pid := c.Pid()
if pid == 0 {
t.Error("expected pid to not be 0")
}
}
func TestStart(t *testing.T) {
c := testChild(t)
// Set our own reader and writer so we can verify they are wired to the child.
stdin := gatedio.NewByteBuffer()
stdout := gatedio.NewByteBuffer()
stderr := gatedio.NewByteBuffer()
// Custom env and command
env := []string{"a=b", "c=d"}
cmd := exec.Command("env")
cmd.Stdin = stdin
cmd.Stdout = stdout
cmd.Stderr = stderr
cmd.Env = env
c.cmd = cmd
if err := c.Start(); err != nil {
t.Fatal(err)
}
defer c.Stop()
select {
case <-c.ExitCh():
case <-time.After(fileWaitSleepDelay):
t.Fatal("process should have exited")
}
output := stdout.String()
for _, envVar := range env {
if !strings.Contains(output, envVar) {
t.Errorf("expected to find %q in %q", envVar, output)
}
}
}
func TestKill_noSignal(t *testing.T) {
c := testChild(t)
c.cmd = exec.Command("sh", "-c", "while true; do sleep 0.2; done")
c.killTimeout = 20 * time.Millisecond
c.killSignal = nil
if err := c.Start(); err != nil {
t.Fatal(err)
}
defer c.Stop()
// For some reason bash doesn't start immediately
time.Sleep(fileWaitSleepDelay)
c.Kill()
// Give time for the file to flush
time.Sleep(fileWaitSleepDelay)
if c.cmd != nil {
t.Errorf("expected cmd to be nil")
}
}
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