Improved error message

parser/parser_test.go

@@ -28,6 +28,7 @@ LICENSE
 package parser
 
 import (
+	"fmt"
 	"io/ioutil"
 	"log"
 	"os"
@@ -68,9 +69,10 @@ func TestH264Parser(t *testing.T) {
 		select {
 		case parser.InputChan() <- data[i]:
 		case frame := <-parser.OutputChan():
-			out, err := os.Create("testOutput/" + strconv.Itoa(n) + ".h264_frame")
+			path := fmt.Sprintf("testOutput/" + strconv.Itoa(n) + "h264_frame")
+			out, err := os.Create(path)
 			if err != nil {
-				t.Errorf("Should not have got error creating output file!")
+				t.Errorf("Unexpected error creating %q: %v", path, err)
 				return
 			}
 			out.Write(frame)