/usr/share/gocode/src/github.com/mitchellh/panicwrap/panicwrap_test.go is in golang-github-mitchellh-panicwrap-dev 0.0~git20151215.0.a1e50bc-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import (
"bytes"
"fmt"
"os"
"os/exec"
"regexp"
"strings"
"testing"
"time"
)
var wrapRe = regexp.MustCompile(`wrapped: \d{3,4}`)
func helperProcess(s ...string) *exec.Cmd {
cs := []string{"-test.run=TestHelperProcess", "--"}
cs = append(cs, s...)
env := []string{
"GO_WANT_HELPER_PROCESS=1",
}
cmd := exec.Command(os.Args[0], cs...)
cmd.Env = append(env, os.Environ()...)
cmd.Stdin = os.Stdin
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
return cmd
}
// This is executed by `helperProcess` in a separate process in order to
// provider a proper sub-process environment to test some of our functionality.
func TestHelperProcess(*testing.T) {
if os.Getenv("GO_WANT_HELPER_PROCESS") != "1" {
return
}
// Find the arguments to our helper, which are the arguments past
// the "--" in the command line.
args := os.Args
for len(args) > 0 {
if args[0] == "--" {
args = args[1:]
break
}
args = args[1:]
}
if len(args) == 0 {
fmt.Fprintf(os.Stderr, "No command\n")
os.Exit(2)
}
panicHandler := func(s string) {
fmt.Fprintf(os.Stdout, "wrapped: %d", len(s))
os.Exit(0)
}
cmd, args := args[0], args[1:]
switch cmd {
case "no-panic-ordered-output":
exitStatus, err := BasicWrap(panicHandler)
if err != nil {
fmt.Fprintf(os.Stderr, "wrap error: %s", err)
os.Exit(1)
}
if exitStatus < 0 {
for i := 0; i < 1000; i++ {
os.Stdout.Write([]byte("a"))
os.Stderr.Write([]byte("b"))
}
os.Exit(0)
}
os.Exit(exitStatus)
case "no-panic-output":
fmt.Fprint(os.Stdout, "i am output")
fmt.Fprint(os.Stderr, "stderr out")
os.Exit(0)
case "panic-boundary":
exitStatus, err := BasicWrap(panicHandler)
if err != nil {
fmt.Fprintf(os.Stderr, "wrap error: %s", err)
os.Exit(1)
}
if exitStatus < 0 {
// Simulate a panic but on two boundaries...
fmt.Fprint(os.Stderr, "pan")
os.Stderr.Sync()
time.Sleep(100 * time.Millisecond)
fmt.Fprint(os.Stderr, "ic: oh crap")
os.Exit(2)
}
os.Exit(exitStatus)
case "panic-long":
exitStatus, err := BasicWrap(panicHandler)
if err != nil {
fmt.Fprintf(os.Stderr, "wrap error: %s", err)
os.Exit(1)
}
if exitStatus < 0 {
// Make a fake panic by faking the header and adding a
// bunch of garbage.
fmt.Fprint(os.Stderr, "panic: foo\n\n")
for i := 0; i < 1024; i++ {
fmt.Fprint(os.Stderr, "foobarbaz")
}
// Sleep so that it dumps the previous data
//time.Sleep(1 * time.Millisecond)
time.Sleep(500 * time.Millisecond)
// Make a real panic
panic("I AM REAL!")
}
os.Exit(exitStatus)
case "panic":
hidePanic := false
if args[0] == "hide" {
hidePanic = true
}
config := &WrapConfig{
Handler: panicHandler,
HidePanic: hidePanic,
}
exitStatus, err := Wrap(config)
if err != nil {
fmt.Fprintf(os.Stderr, "wrap error: %s", err)
os.Exit(1)
}
if exitStatus < 0 {
panic("uh oh")
}
os.Exit(exitStatus)
case "wrapped":
child := false
if len(args) > 0 && args[0] == "child" {
child = true
}
config := &WrapConfig{
Handler: panicHandler,
}
exitStatus, err := Wrap(config)
if err != nil {
fmt.Fprintf(os.Stderr, "wrap error: %s", err)
os.Exit(1)
}
if exitStatus < 0 {
if child {
fmt.Printf("%v", Wrapped(config))
}
os.Exit(0)
}
if !child {
fmt.Printf("%v", Wrapped(config))
}
os.Exit(exitStatus)
default:
fmt.Fprintf(os.Stderr, "Unknown command: %q\n", cmd)
os.Exit(2)
}
}
func TestPanicWrap_Output(t *testing.T) {
stderr := new(bytes.Buffer)
stdout := new(bytes.Buffer)
p := helperProcess("no-panic-output")
p.Stdout = stdout
p.Stderr = stderr
if err := p.Run(); err != nil {
t.Fatalf("err: %s", err)
}
if !strings.Contains(stdout.String(), "i am output") {
t.Fatalf("didn't forward: %#v", stdout.String())
}
if !strings.Contains(stderr.String(), "stderr out") {
t.Fatalf("didn't forward: %#v", stderr.String())
}
}
/*
TODO(mitchellh): This property would be nice to gain.
func TestPanicWrap_Output_Order(t *testing.T) {
output := new(bytes.Buffer)
p := helperProcess("no-panic-ordered-output")
p.Stdout = output
p.Stderr = output
if err := p.Run(); err != nil {
t.Fatalf("err: %s", err)
}
expectedBuf := new(bytes.Buffer)
for i := 0; i < 1000; i++ {
expectedBuf.WriteString("ab")
}
actual := strings.TrimSpace(output.String())
expected := strings.TrimSpace(expectedBuf.String())
if actual != expected {
t.Fatalf("bad: %#v", actual)
}
}
*/
func TestPanicWrap_panicHide(t *testing.T) {
stdout := new(bytes.Buffer)
stderr := new(bytes.Buffer)
p := helperProcess("panic", "hide")
p.Stdout = stdout
p.Stderr = stderr
if err := p.Run(); err != nil {
t.Fatalf("err: %s", err)
}
if wrapRe.FindString(stdout.String()) == "" {
t.Fatalf("didn't wrap: %#v", stdout.String())
}
if strings.Contains(stderr.String(), "panic:") {
t.Fatalf("shouldn't have panic: %#v", stderr.String())
}
}
func TestPanicWrap_panicShow(t *testing.T) {
stdout := new(bytes.Buffer)
stderr := new(bytes.Buffer)
p := helperProcess("panic", "show")
p.Stdout = stdout
p.Stderr = stderr
if err := p.Run(); err != nil {
t.Fatalf("err: %s", err)
}
if wrapRe.FindString(stdout.String()) == "" {
t.Fatalf("didn't wrap: %#v", stdout.String())
}
if !strings.Contains(stderr.String(), "panic:") {
t.Fatalf("should have panic: %#v", stderr.String())
}
}
func TestPanicWrap_panicLong(t *testing.T) {
stdout := new(bytes.Buffer)
p := helperProcess("panic-long")
p.Stdout = stdout
p.Stderr = new(bytes.Buffer)
if err := p.Run(); err != nil {
t.Fatalf("err: %s", err)
}
if wrapRe.FindString(stdout.String()) == "" {
t.Fatalf("didn't wrap: %#v", stdout.String())
}
}
func TestPanicWrap_panicBoundary(t *testing.T) {
// TODO(mitchellh): panics are currently lost on boundaries
t.SkipNow()
stdout := new(bytes.Buffer)
p := helperProcess("panic-boundary")
p.Stdout = stdout
//p.Stderr = new(bytes.Buffer)
if err := p.Run(); err != nil {
t.Fatalf("err: %s", err)
}
if wrapRe.FindString(stdout.String()) == "" {
t.Fatalf("didn't wrap: %#v", stdout.String())
}
}
func TestWrapped(t *testing.T) {
stdout := new(bytes.Buffer)
p := helperProcess("wrapped", "child")
p.Stdout = stdout
if err := p.Run(); err != nil {
t.Fatalf("err: %s", err)
}
if !strings.Contains(stdout.String(), "true") {
t.Fatalf("bad: %#v", stdout.String())
}
}
func TestWrapped_parent(t *testing.T) {
stdout := new(bytes.Buffer)
p := helperProcess("wrapped")
p.Stdout = stdout
if err := p.Run(); err != nil {
t.Fatalf("err: %s", err)
}
if !strings.Contains(stdout.String(), "false") {
t.Fatalf("bad: %#v", stdout.String())
}
}
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