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|
package logrus
import (
"io/ioutil"
"log"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"testing"
"time"
)
func TestRegister(t *testing.T) {
current := len(handlers)
var results []string
h1 := func() { results = append(results, "first") }
h2 := func() { results = append(results, "second") }
RegisterExitHandler(h1)
RegisterExitHandler(h2)
if len(handlers) != current+2 {
t.Fatalf("expected %d handlers, got %d", current+2, len(handlers))
}
runHandlers()
if len(results) != 2 {
t.Fatalf("expected 2 handlers to be run, ran %d", len(results))
}
if results[0] != "first" {
t.Fatal("expected handler h1 to be run first, but it wasn't")
}
if results[1] != "second" {
t.Fatal("expected handler h2 to be run second, but it wasn't")
}
}
func TestDefer(t *testing.T) {
current := len(handlers)
var results []string
h1 := func() { results = append(results, "first") }
h2 := func() { results = append(results, "second") }
DeferExitHandler(h1)
DeferExitHandler(h2)
if len(handlers) != current+2 {
t.Fatalf("expected %d handlers, got %d", current+2, len(handlers))
}
runHandlers()
if len(results) != 2 {
t.Fatalf("expected 2 handlers to be run, ran %d", len(results))
}
if results[0] != "second" {
t.Fatal("expected handler h2 to be run first, but it wasn't")
}
if results[1] != "first" {
t.Fatal("expected handler h1 to be run second, but it wasn't")
}
}
func TestHandler(t *testing.T) {
testprog := testprogleader
testprog = append(testprog, getPackage()...)
testprog = append(testprog, testprogtrailer...)
tempDir, err := ioutil.TempDir("", "test_handler")
if err != nil {
log.Fatalf("can't create temp dir. %q", err)
}
defer os.RemoveAll(tempDir)
gofile := filepath.Join(tempDir, "gofile.go")
if err := ioutil.WriteFile(gofile, testprog, 0666); err != nil {
t.Fatalf("can't create go file. %q", err)
}
outfile := filepath.Join(tempDir, "outfile.out")
arg := time.Now().UTC().String()
err = exec.Command("go", "run", gofile, outfile, arg).Run()
if err == nil {
t.Fatalf("completed normally, should have failed")
}
data, err := ioutil.ReadFile(outfile)
if err != nil {
t.Fatalf("can't read output file %s. %q", outfile, err)
}
if string(data) != arg {
t.Fatalf("bad data. Expected %q, got %q", data, arg)
}
}
// getPackage returns the name of the current package, which makes running this
// test in a fork simpler
func getPackage() []byte {
pc, _, _, _ := runtime.Caller(0)
fullFuncName := runtime.FuncForPC(pc).Name()
idx := strings.LastIndex(fullFuncName, ".")
return []byte(fullFuncName[:idx]) // trim off function details
}
var testprogleader = []byte(`
// Test program for atexit, gets output file and data as arguments and writes
// data to output file in atexit handler.
package main
import (
"`)
var testprogtrailer = []byte(
`"
"flag"
"fmt"
"io/ioutil"
)
var outfile = ""
var data = ""
func handler() {
ioutil.WriteFile(outfile, []byte(data), 0666)
}
func badHandler() {
n := 0
fmt.Println(1/n)
}
func main() {
flag.Parse()
outfile = flag.Arg(0)
data = flag.Arg(1)
logrus.RegisterExitHandler(handler)
logrus.RegisterExitHandler(badHandler)
logrus.Fatal("Bye bye")
}
`)
|
