From 3c8582d2b1ab14bc0475ba2491c5738fb9c8063d Mon Sep 17 00:00:00 2001
From: qydysky <32743305+qydysky@users.noreply.github.com>
Date: Sun, 16 Oct 2022 12:47:18 +0800
Subject: [PATCH] fix

---
 file/FileWR.go      | 4 +---
 file/FileWR_test.go | 8 ++++++++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/file/FileWR.go b/file/FileWR.go
index f021e48..063b6a1 100644
--- a/file/FileWR.go
+++ b/file/FileWR.go
@@ -127,11 +127,9 @@ func (t *File) ReadUntil(separation byte, perReadSize int, maxReadSize int) (dat
 		n, e = t.read().Read(tmpArea)
 
 		if n == 0 && e != nil {
-			if errors.Is(e, io.EOF) {
-				e = nil
-			}
 			return
 		}
+
 		maxReadSize = maxReadSize - n
 
 		if i := bytes.Index(tmpArea[:n], []byte{separation}); i != -1 {
diff --git a/file/FileWR_test.go b/file/FileWR_test.go
index 4753577..801c0ee 100644
--- a/file/FileWR_test.go
+++ b/file/FileWR_test.go
@@ -2,6 +2,8 @@ package part
 
 import (
 	"bytes"
+	"errors"
+	"io"
 	"testing"
 
 	"golang.org/x/text/encoding/simplifiedchinese"
@@ -156,6 +158,12 @@ func TestReadUntil(t *testing.T) {
 		t.Fatal(string(data))
 	}
 
+	if data, e := f.ReadUntil('\n', 5, 20); e == nil || !errors.Is(e, io.EOF) {
+		t.Fatal(e)
+	} else {
+		t.Log(string(data))
+	}
+
 	if e := f.Close(); e != nil {
 		t.Fatal(e)
 	}
-- 
2.39.2