chore: add more tests (#3338)

core/proc/goroutines.go

@@ -18,7 +18,11 @@ const (
 	debugLevel       = 2
 )
 
-func dumpGoroutines() {
+type creator interface {
+	Create(name string) (file *os.File, err error)
+}
+
+func dumpGoroutines(ctor creator) {
 	command := path.Base(os.Args[0])
 	pid := syscall.Getpid()
 	dumpFile := path.Join(os.TempDir(), fmt.Sprintf("%s-%d-goroutines-%s.dump",
@@ -26,10 +30,16 @@ func dumpGoroutines() {
 
 	logx.Infof("Got dump goroutine signal, printing goroutine profile to %s", dumpFile)
 
-	if f, err := os.Create(dumpFile); err != nil {
+	if f, err := ctor.Create(dumpFile); err != nil {
 		logx.Errorf("Failed to dump goroutine profile, error: %v", err)
 	} else {
 		defer f.Close()
 		pprof.Lookup(goroutineProfile).WriteTo(f, debugLevel)
 	}
 }
+
+type fileCreator struct{}
+
+func (fc fileCreator) Create(name string) (file *os.File, err error) {
+	return os.Create(name)
+}