Gets error code from error as int

client_test.go

@@ -327,6 +327,7 @@ func TestReadStreamRangeUnkownLength(t *testing.T) {
 func TestStat(t *testing.T) {
 	cli, srv, _, _ := newServer(t)
 	defer srv.Close()
+	wantErrCode := 404
 
 	info, err := cli.Stat("/hello.txt")
 	if err != nil {
@@ -343,6 +344,9 @@ func TestStat(t *testing.T) {
 	if !IsErrNotFound(err) {
 		t.Fatalf("got: %v, want 404 error", err)
 	}
+	if GetStatusCode(err) != wantErrCode {
+		t.Fatalf("got: %v, want %d", err, wantErrCode)
+	}
 }
 
 func TestMkdir(t *testing.T) {

errors.go

@@ -3,6 +3,7 @@ package gowebdav
 import (
 	"errors"
 	"fmt"
+	"net/http"
 	"os"
 )
 
@@ -55,3 +56,16 @@ func NewPathErrorErr(op string, path string, err error) error {
 		Err:  err,
 	}
 }
+
+// GetStatusCode returns status code of the error
+func GetStatusCode(err error) int {
+	var pe *os.PathError
+	if !errors.As(err, &pe) {
+		return http.StatusInternalServerError
+	}
+	var se StatusError
+	if !errors.As(pe.Err, &se) {
+		return http.StatusInternalServerError
+	}
+	return se.Status
+}